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RSS2015 Vol. 2, No. S1
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2015, 2(S1): 1-4.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.001
Abstract:
Power direct exchange (PDE) for power users and power companies can independently negotiate power and determine the exchange price. Power direct exchange is an important measure to promote the reform of the China. According to this paper, the situation of direct exchange of China and abroad is introduced briefly. Characteristics and evolution of power direct exchange is analyzed. Power direct exchange mode in future is prospected. In one case, social benefits and necessity of power direct exchange is studied in one province, to provide a reference for the implementation of the power direct exchange.
Power direct exchange (PDE) for power users and power companies can independently negotiate power and determine the exchange price. Power direct exchange is an important measure to promote the reform of the China. According to this paper, the situation of direct exchange of China and abroad is introduced briefly. Characteristics and evolution of power direct exchange is analyzed. Power direct exchange mode in future is prospected. In one case, social benefits and necessity of power direct exchange is studied in one province, to provide a reference for the implementation of the power direct exchange.
2015, 2(S1): 5-9.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.002
Abstract:
Energy storage technology, as an important element of the micro-grid, the rationality of its capacity configuration seriously impacts the operation performance and economy benefit of the micro-grid. This paper mainly focus on three purposes: Short-time power supply, Electric peak regulation & hot standby and Distributed generation power smoothing. And it proposed according to the main effect of BESS in micro-grid, with considering the requirement of the project on power supply reliability and power quality, and the operating condition of the battery, optimization calculation method on flexibly configuring BESS capacity, which provided theoretical basis of micro-grid project design.
Energy storage technology, as an important element of the micro-grid, the rationality of its capacity configuration seriously impacts the operation performance and economy benefit of the micro-grid. This paper mainly focus on three purposes: Short-time power supply, Electric peak regulation & hot standby and Distributed generation power smoothing. And it proposed according to the main effect of BESS in micro-grid, with considering the requirement of the project on power supply reliability and power quality, and the operating condition of the battery, optimization calculation method on flexibly configuring BESS capacity, which provided theoretical basis of micro-grid project design.
2015, 2(S1): 10-14.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.003
Abstract:
In view of the present fly ash carbon content measurement method for thermal power plant coal-fired boiler exists the problems such as time delay and low precision, on the basis of the boiler fly ash carbon content influencing factors' analysis, using the thought that the combination of multiple models can improve the model accuracy and robustness, we proposed a multi-model dynamic soft sensor modeling method based on support vector machine (SVM) fusion. This modeling method uses the time series data to build a model, each submodel express the estimate of the output in one condition, and each submodel's predicted output realizes the variable weighting fusion through SVM method. We did a modeling study of fly ash carbon content soft sensor, using the historical data of thermal power plant, and the result shows that the method can achieve better measurement effect.
In view of the present fly ash carbon content measurement method for thermal power plant coal-fired boiler exists the problems such as time delay and low precision, on the basis of the boiler fly ash carbon content influencing factors' analysis, using the thought that the combination of multiple models can improve the model accuracy and robustness, we proposed a multi-model dynamic soft sensor modeling method based on support vector machine (SVM) fusion. This modeling method uses the time series data to build a model, each submodel express the estimate of the output in one condition, and each submodel's predicted output realizes the variable weighting fusion through SVM method. We did a modeling study of fly ash carbon content soft sensor, using the historical data of thermal power plant, and the result shows that the method can achieve better measurement effect.
2015, 2(S1): 15-18,14.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.004
Abstract:
By the analysis on F advanced class combined cycle power plant operation conditions, sizing calculation method of air compressor and air receiver is investigated as per gas turbine special requirements. The calculated results show that 4 air compressors with capacity of 25 Nm3/min and 4 receivers with capacity of 30 m3 can make units running in safe condition and meet the minimum static investment requirement. The optimization design of the compressed air system has improved plant service air system to enable the air receiver to be served for the instrument air system during emergency condition. With the engineering practice in this project, it will provide reference to future similar engineering calculation for compressed air system.
By the analysis on F advanced class combined cycle power plant operation conditions, sizing calculation method of air compressor and air receiver is investigated as per gas turbine special requirements. The calculated results show that 4 air compressors with capacity of 25 Nm3/min and 4 receivers with capacity of 30 m3 can make units running in safe condition and meet the minimum static investment requirement. The optimization design of the compressed air system has improved plant service air system to enable the air receiver to be served for the instrument air system during emergency condition. With the engineering practice in this project, it will provide reference to future similar engineering calculation for compressed air system.
2015, 2(S1): 19-25.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.005
Abstract:
Recently, many thermal power unit is put into service.Those thermal power units, especially supercritical unit, have high operating parameters, complex process system, various high equipment. Those characters put forward higher request to automatic control system. Making Full rational use of the automatic control system is a key method to operate equipment safely, reduce energy consumption, improve the economic benefit in thermal power plant. In this paper Automatic unit start-up and shut-down system (APS) of thermal power unit is introduced in detail, and put forward switch control strategy design method of whole process, full condition, automatic control system. Finally, the paper gives application case of whole process, full condition, automatic control system. switch control strategy design method of whole process, full condition, automatic control system. This switch control strategy design method is proved to be effective by application case.
Recently, many thermal power unit is put into service.Those thermal power units, especially supercritical unit, have high operating parameters, complex process system, various high equipment. Those characters put forward higher request to automatic control system. Making Full rational use of the automatic control system is a key method to operate equipment safely, reduce energy consumption, improve the economic benefit in thermal power plant. In this paper Automatic unit start-up and shut-down system (APS) of thermal power unit is introduced in detail, and put forward switch control strategy design method of whole process, full condition, automatic control system. Finally, the paper gives application case of whole process, full condition, automatic control system. switch control strategy design method of whole process, full condition, automatic control system. This switch control strategy design method is proved to be effective by application case.
2015, 2(S1): 26-29.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.006
Abstract:
The conception, classification, and detection methods of electrochemical noise are presented, and the basic principle of analysis methods of electrochemical noise, such as frequency-domain analysis, time-domain analysis and wavelet analysis has been discussed. In this paper, examples for application of electrochemical noise in corrosion research have been introduced, and exception of future research is described.
The conception, classification, and detection methods of electrochemical noise are presented, and the basic principle of analysis methods of electrochemical noise, such as frequency-domain analysis, time-domain analysis and wavelet analysis has been discussed. In this paper, examples for application of electrochemical noise in corrosion research have been introduced, and exception of future research is described.
2015, 2(S1): 30-34.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.007
Abstract:
A 500 kV Saturated Iron-core Superconductive Fault Current Limiter (SISFCL) has been designed to be installed in an EHV transmission system in southern China. We carried out studies on compatibility and coordination problems in the application of this kind of device in an EHV network. In this paper, the operational principle of an SISFCL and the protection configuration of transmission lines are briefly introduced. The influence of an SISFCL on the zero-sequence current protection of the grid, taking into consideration both the fault of SISFCL itself and fault of the power lines, is discussed. In order to coordinate the SISFCL and the grid protection scheme, requirements and recommendations are proposed. A model of a 500 kV double-circuit transmission system with SISFCLs is built using Electromagnetic Transient Program including DC (EMTDC) software package. The simulation results are in good agreement with the theoretical analyses.
A 500 kV Saturated Iron-core Superconductive Fault Current Limiter (SISFCL) has been designed to be installed in an EHV transmission system in southern China. We carried out studies on compatibility and coordination problems in the application of this kind of device in an EHV network. In this paper, the operational principle of an SISFCL and the protection configuration of transmission lines are briefly introduced. The influence of an SISFCL on the zero-sequence current protection of the grid, taking into consideration both the fault of SISFCL itself and fault of the power lines, is discussed. In order to coordinate the SISFCL and the grid protection scheme, requirements and recommendations are proposed. A model of a 500 kV double-circuit transmission system with SISFCLs is built using Electromagnetic Transient Program including DC (EMTDC) software package. The simulation results are in good agreement with the theoretical analyses.
2015, 2(S1): 35-37,92.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.008
Abstract:
This article represents the simulation model of switching over voltage in black start process by implementing Matlab/psb model and EMTP software separately. Comparing the EMTP with an analyzed simulation of a real system could prove the reliability of Matlab/psb result for an over voltage simulation, and Matlab/psb could be one of the powerful instrument for a power system simulation. Meanwhile it could be concluded that lightning protector would effectively reduce over voltage for several fold, and make switch close successful in early stage during black start.
This article represents the simulation model of switching over voltage in black start process by implementing Matlab/psb model and EMTP software separately. Comparing the EMTP with an analyzed simulation of a real system could prove the reliability of Matlab/psb result for an over voltage simulation, and Matlab/psb could be one of the powerful instrument for a power system simulation. Meanwhile it could be concluded that lightning protector would effectively reduce over voltage for several fold, and make switch close successful in early stage during black start.
2015, 2(S1): 38-45.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.009
Abstract:
With flexible HVDC technology gradually matured, VSC-MTDC transmission system has the features of multiple power supplies and multidrop powered. This makes it as a way of more flexible and efficient transmission got great development. Firstly, this paper make the overview of VSC-MTDC transmission through its topological structure and basic control principle. Then two aspects about the VSC-MTDC transmission system engineering examples and the research status quo at home and abroad are introduced to analyze the VSC-MTDC development present situation. Finally, the application prospects of VSC-MTDC transmission system, such as renewable power integration, power supply of weak power system and island, nonsynchronous connecting of bulk grid, DC power supply and distribution of large city and other areas, are provided.
With flexible HVDC technology gradually matured, VSC-MTDC transmission system has the features of multiple power supplies and multidrop powered. This makes it as a way of more flexible and efficient transmission got great development. Firstly, this paper make the overview of VSC-MTDC transmission through its topological structure and basic control principle. Then two aspects about the VSC-MTDC transmission system engineering examples and the research status quo at home and abroad are introduced to analyze the VSC-MTDC development present situation. Finally, the application prospects of VSC-MTDC transmission system, such as renewable power integration, power supply of weak power system and island, nonsynchronous connecting of bulk grid, DC power supply and distribution of large city and other areas, are provided.
2015, 2(S1): 46-49.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.010
Abstract:
VSC-HVDC technology development has been gradually maturing, in the field of wind power grid interconnection and power grid connection has a large number of applications, has accumulated plenty of engineering experience. Because of the characteristics of VSC-HVDC technology, it has the congenital advantage for using in the field of island power supply. This paper combed the VSC-HVDC technology development situation, basic principle and technical characteristics, summarized the development of the technology and the characteristics of the engineering application, analyzed the application in the field of island power supply, and put forward a typical application plan for island power supply system, and put forward some positive ideas and Suggestions.
VSC-HVDC technology development has been gradually maturing, in the field of wind power grid interconnection and power grid connection has a large number of applications, has accumulated plenty of engineering experience. Because of the characteristics of VSC-HVDC technology, it has the congenital advantage for using in the field of island power supply. This paper combed the VSC-HVDC technology development situation, basic principle and technical characteristics, summarized the development of the technology and the characteristics of the engineering application, analyzed the application in the field of island power supply, and put forward a typical application plan for island power supply system, and put forward some positive ideas and Suggestions.
2015, 2(S1): 50-54.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.011
Abstract:
To ensure rationality of voltage source converter station layout and operational safety, reasonable air clearance is needed as design basis. G parameter method is adopted to calculate the minimum air clearance, and atmospheric correction is discussed when altitude is below 2 000 m. +160 kV converter station for large-scale wind plant integrated with power system based on VSC technology demonstration project is used as an example to analyze air clearance calculating method using g parameter method. The harshest operating condition is calculated by simulation as input of atmospheric correction, and actual air clearance for design is determined.
To ensure rationality of voltage source converter station layout and operational safety, reasonable air clearance is needed as design basis. G parameter method is adopted to calculate the minimum air clearance, and atmospheric correction is discussed when altitude is below 2 000 m. +160 kV converter station for large-scale wind plant integrated with power system based on VSC technology demonstration project is used as an example to analyze air clearance calculating method using g parameter method. The harshest operating condition is calculated by simulation as input of atmospheric correction, and actual air clearance for design is determined.
2015, 2(S1): 55-59.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.012
Abstract:
Xiluodu right bank-Guangdong ±500 kV double circuit DC transmission project is the first ±500 kV double circuit DC transmission line in China. This paper introduces the key point of the tower designing. The SJ101 was subjected to design and test under cooperation conditions including wind, anchor-wire, broken wire etc. After comparing the test results with the theoretical calculation, the main causes of test error are analyzed. The result show that the actual displacement and stress of the tower SJ101 are in agreement with the theoretical calculation. Finally, the tower collapsed with the test overload 120%. The results are consistent with the design expectations, and show that the tower design is safe and reasonable, and provide the scientific basis and reference for the engineering design.
Xiluodu right bank-Guangdong ±500 kV double circuit DC transmission project is the first ±500 kV double circuit DC transmission line in China. This paper introduces the key point of the tower designing. The SJ101 was subjected to design and test under cooperation conditions including wind, anchor-wire, broken wire etc. After comparing the test results with the theoretical calculation, the main causes of test error are analyzed. The result show that the actual displacement and stress of the tower SJ101 are in agreement with the theoretical calculation. Finally, the tower collapsed with the test overload 120%. The results are consistent with the design expectations, and show that the tower design is safe and reasonable, and provide the scientific basis and reference for the engineering design.
2015, 2(S1): 60-65.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.013
Abstract:
±200 MVar STATCOM is by far the largest-capacity dynamic reactive power compensation device in the world. Because of the voltage-supporting function and higher cost, it is necessary to discuss protection strategies of commutation devices and auxiliary equipment; and then, to make it safety and reliable. In this paper, on the basic of analyzing main circuit design and H-bridge structure of cascaded STATCOM, select and discuss several aspects of relay-protection including device-level protection strategies of STATCOM, module-level protection strategies of STATCOM, breaker malfunction protection strategies; finally propose optimizations for protection scheme. A Clearer protection configuration and optimization strategies have a greater significance for multi-H-bridge cascade STATCOM in engineering applications.
±200 MVar STATCOM is by far the largest-capacity dynamic reactive power compensation device in the world. Because of the voltage-supporting function and higher cost, it is necessary to discuss protection strategies of commutation devices and auxiliary equipment; and then, to make it safety and reliable. In this paper, on the basic of analyzing main circuit design and H-bridge structure of cascaded STATCOM, select and discuss several aspects of relay-protection including device-level protection strategies of STATCOM, module-level protection strategies of STATCOM, breaker malfunction protection strategies; finally propose optimizations for protection scheme. A Clearer protection configuration and optimization strategies have a greater significance for multi-H-bridge cascade STATCOM in engineering applications.
2015, 2(S1): 66-70,114.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.014
Abstract:
By solving the current distribution equation of submarine cable's core wire, sheath and armor, the influence of grounding style, grounding resistance and armored material to the reflux characteristic of sheath and amour were analyzed in normal operation. The calculation results show that the reflux characteristic of sheath and amour is closely related to the ground state of submarine power cables. When the parallel distance is short and the parallel length is long, a submarine power cable on the magnetic induction effect of adjacent signal cable should not be ignored.
By solving the current distribution equation of submarine cable's core wire, sheath and armor, the influence of grounding style, grounding resistance and armored material to the reflux characteristic of sheath and amour were analyzed in normal operation. The calculation results show that the reflux characteristic of sheath and amour is closely related to the ground state of submarine power cables. When the parallel distance is short and the parallel length is long, a submarine power cable on the magnetic induction effect of adjacent signal cable should not be ignored.
2015, 2(S1): 71-75.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.015
Abstract:
According to the relationship between the electrical equipment current-carrying fault and contact resistance, loaded-current, surface environmental temperature and board dimension,this paper study and set up high-voltage electrical equipment current-carrying patch board fault temperature rise fault finite element approach, by means of heat transfer theory, build temperature rise model. According to a 35 kV current transformer loaded-current patch board heating-fault, this paper analysis by the ANSYS simulation calculation way,and research focus on current-carrying temperature rais effect of current size, surface environmental temperature and board dimension. Analytic result has important references for the current-heating fault judgment of the electrical equipment, and has important references for the manufactures selecting board dimension on high-voltage electrical equipment.
According to the relationship between the electrical equipment current-carrying fault and contact resistance, loaded-current, surface environmental temperature and board dimension,this paper study and set up high-voltage electrical equipment current-carrying patch board fault temperature rise fault finite element approach, by means of heat transfer theory, build temperature rise model. According to a 35 kV current transformer loaded-current patch board heating-fault, this paper analysis by the ANSYS simulation calculation way,and research focus on current-carrying temperature rais effect of current size, surface environmental temperature and board dimension. Analytic result has important references for the current-heating fault judgment of the electrical equipment, and has important references for the manufactures selecting board dimension on high-voltage electrical equipment.
2015, 2(S1): 76-79.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.016
Abstract:
Shenzhen substation is ultra-scale extending the NO.3 connecting transformer. 500 kV XLPE cable and GIB incoming feeder schemers of the NO.3 connecting transformer were analysed through techno-economic comparison in this paper. Compering to XLPE cable, GIB is more technically mature, superior performance and reliable. On the other side of life cycle cost (LCC), GIB schemer is economically feasible. The NO.3 connecting transformer incoming feeder finally adopt GIB schemer with length of 750 meters, its aerial installation path contains roof, wall, road and narrow area. Engineering experiences are summarized from three aspects of technical parameters, schemer design and foundation constructing. These experiences could be used for reference in other substation extending, where the tension space is too difficult to arrange and GIB is adopted.
Shenzhen substation is ultra-scale extending the NO.3 connecting transformer. 500 kV XLPE cable and GIB incoming feeder schemers of the NO.3 connecting transformer were analysed through techno-economic comparison in this paper. Compering to XLPE cable, GIB is more technically mature, superior performance and reliable. On the other side of life cycle cost (LCC), GIB schemer is economically feasible. The NO.3 connecting transformer incoming feeder finally adopt GIB schemer with length of 750 meters, its aerial installation path contains roof, wall, road and narrow area. Engineering experiences are summarized from three aspects of technical parameters, schemer design and foundation constructing. These experiences could be used for reference in other substation extending, where the tension space is too difficult to arrange and GIB is adopted.
2015, 2(S1): 80-82,9.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.017
Abstract:
The conception of the wind load on tower is introduced, and the calculation formula for anti-wind capacity of the transmission line tower is derived. The study shows that the anti-wind capacity of the tower can be evaluated quickly and accurately by this method.
The conception of the wind load on tower is introduced, and the calculation formula for anti-wind capacity of the transmission line tower is derived. The study shows that the anti-wind capacity of the tower can be evaluated quickly and accurately by this method.
2015, 2(S1): 83-87.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.018
Abstract:
According to the established offshore wind power development goal of National Energy Administration, about 100 offshore substation platforms will be built until 2020 which means large construction scale of offshore substations will appear in China. "Offshore substation"(OSS) epitomizes the combination of electrical engineering and ocean engineering, what becomes the key issue of developing offshore wind power is to build OSS for transmitting electricity power generated by offshore wind farms. This paper shows ideas, principles, contents of OSS structural design and then puts emphasis on design considerations and analysis contents of different OSS structural design stages, provides a set of feasible method for structural design of Offshore substation.
According to the established offshore wind power development goal of National Energy Administration, about 100 offshore substation platforms will be built until 2020 which means large construction scale of offshore substations will appear in China. "Offshore substation"(OSS) epitomizes the combination of electrical engineering and ocean engineering, what becomes the key issue of developing offshore wind power is to build OSS for transmitting electricity power generated by offshore wind farms. This paper shows ideas, principles, contents of OSS structural design and then puts emphasis on design considerations and analysis contents of different OSS structural design stages, provides a set of feasible method for structural design of Offshore substation.
2015, 2(S1): 88-92.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.019
Abstract:
Early transformer substation outdoor trusses are all structured in reinforced concrete. Du to the structure feature of the concrete, technical limit and construction quality in the old days, with years' operation, corrosion of craze and peeling wildly appears on the surface concrete of these trusses which seriously affects transformer substation's operation and safety. Lately years,more substation framework are rein forced by FRP. In this Paper, a range of tests about the durability of FRP strengthening structures with wet-condition have been accomplished, and a comprehensive control strategy have been obtained.
Early transformer substation outdoor trusses are all structured in reinforced concrete. Du to the structure feature of the concrete, technical limit and construction quality in the old days, with years' operation, corrosion of craze and peeling wildly appears on the surface concrete of these trusses which seriously affects transformer substation's operation and safety. Lately years,more substation framework are rein forced by FRP. In this Paper, a range of tests about the durability of FRP strengthening structures with wet-condition have been accomplished, and a comprehensive control strategy have been obtained.
2015, 2(S1): 93-97.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.020
Abstract:
In this paper, the fire protection design of offshore wind farm is established, including the offshore wind turbines, offshore wind farm substation and land control center building. Each offshore wind turbine, offshore wind farm substation and land control center building set up independent fire alarm system, mainly adopt the suction type smoke detector and point type compound smoke temperature detector for the confirmation of the secondary alarm. At the same time, their fire extinguishing system are: high pressure CO2 fire extinguishing system, water mist fire extinguishing system and water spray extinguishing system respectively. Finally, combining with an engineering case, the fire protection design of offshore wind farm is designed specifically.
In this paper, the fire protection design of offshore wind farm is established, including the offshore wind turbines, offshore wind farm substation and land control center building. Each offshore wind turbine, offshore wind farm substation and land control center building set up independent fire alarm system, mainly adopt the suction type smoke detector and point type compound smoke temperature detector for the confirmation of the secondary alarm. At the same time, their fire extinguishing system are: high pressure CO2 fire extinguishing system, water mist fire extinguishing system and water spray extinguishing system respectively. Finally, combining with an engineering case, the fire protection design of offshore wind farm is designed specifically.
2015, 2(S1): 98-100,104.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.021
Abstract:
The spray bank is the most important system of absorber in wet limestone-gypsum FGD plant. The design will affect the performance data and operation reliability of FGD. For large-scale absorber, how to ensure the nozzles with high removal efficiency without slurry injecting and wearing absorber and support beam, is critical problem in the design of spray bank. This article introduces the process design principle of spray bank in order to provide reference experience for the similar FGD project in domestic.
The spray bank is the most important system of absorber in wet limestone-gypsum FGD plant. The design will affect the performance data and operation reliability of FGD. For large-scale absorber, how to ensure the nozzles with high removal efficiency without slurry injecting and wearing absorber and support beam, is critical problem in the design of spray bank. This article introduces the process design principle of spray bank in order to provide reference experience for the similar FGD project in domestic.
2015, 2(S1): 101-104.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.022
Abstract:
Finite element analysis will be chosen to do the anti-seismic calculation of large natural draft cooling tower in most conditions.Due to the large size of cooling tower, however, it will take a long time to calculate with a fine meshed modal.At the same time, a thin meshed modal will not guarantee the accuracy of the results. In this paper, methods of finite element analysis with a fine meshed modal which focus on the week part of the structure is proposed. It is based on the holistic finite element analysis of a large natural draft cooling tower.This paper proves that deformation of the cooling tower appears mainly on the pillars.
Finite element analysis will be chosen to do the anti-seismic calculation of large natural draft cooling tower in most conditions.Due to the large size of cooling tower, however, it will take a long time to calculate with a fine meshed modal.At the same time, a thin meshed modal will not guarantee the accuracy of the results. In this paper, methods of finite element analysis with a fine meshed modal which focus on the week part of the structure is proposed. It is based on the holistic finite element analysis of a large natural draft cooling tower.This paper proves that deformation of the cooling tower appears mainly on the pillars.
2015, 2(S1): 105-107.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.023
Abstract:
Based on nonlinear FEM method, the author adopt concrete damage plastic model, analyze the structure nonlinear behavior in different load cases, and obtain the occurrence and development of the plastic damage of cooling tower. The analysis reveals that the damage of cooling tower occur at the top firstly and some paralleling damage zones occur at the height of half the tower which will develops 45 degrees downward. The development of the damage will continue until the cooling tower losing bearing capacity. The results is very meaningful for the design of nuclear power plant cooling tower as well as the safety evaluation.
Based on nonlinear FEM method, the author adopt concrete damage plastic model, analyze the structure nonlinear behavior in different load cases, and obtain the occurrence and development of the plastic damage of cooling tower. The analysis reveals that the damage of cooling tower occur at the top firstly and some paralleling damage zones occur at the height of half the tower which will develops 45 degrees downward. The development of the damage will continue until the cooling tower losing bearing capacity. The results is very meaningful for the design of nuclear power plant cooling tower as well as the safety evaluation.
2015, 2(S1): 108-114.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.024
Abstract:
Based on the Fluent software, we used the standard k-ε model to close the Reynolds average equations and analyze the flow field in the three-dimensional of the air cooled condenser system (ACC) for the specific project.We calculated the fields of air velocity and temperature and established the relevant equations and theory models. Combined with the actual situation of the project, we deeply analyze the flow field of the ACC: 1)Installation of windshield board in high-temperature and specially wind environment improve the most effective measures to the thermal performance for the ACC. 2) Increase the number of windshield board to improve the thermal performance for the ACC, four or more windshield board to improve the heat dissipation rate of increase is very small, and we suggest that they're installed in the lower portion of the fan draft tube. 3) Although the windshield board have obviously effect, and it can greatly change the fan inlet into the wind conditions, fans need to run safely and operate effectively.
Based on the Fluent software, we used the standard k-ε model to close the Reynolds average equations and analyze the flow field in the three-dimensional of the air cooled condenser system (ACC) for the specific project.We calculated the fields of air velocity and temperature and established the relevant equations and theory models. Combined with the actual situation of the project, we deeply analyze the flow field of the ACC: 1)Installation of windshield board in high-temperature and specially wind environment improve the most effective measures to the thermal performance for the ACC. 2) Increase the number of windshield board to improve the thermal performance for the ACC, four or more windshield board to improve the heat dissipation rate of increase is very small, and we suggest that they're installed in the lower portion of the fan draft tube. 3) Although the windshield board have obviously effect, and it can greatly change the fan inlet into the wind conditions, fans need to run safely and operate effectively.
2015, 2(S1): 115-118.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.025
Abstract:
the importance of displacement and deformation calculation is obvious while designing spring supported TG foundation. Major TG manufacturers like ALSTOM, SEIMENS and Mitsubishi all provided their foundation designer design guidelines, which are described in this paper. Finally, a design case is introduced to show the importance of displacement and deformation calculation during the design of spring elements.
the importance of displacement and deformation calculation is obvious while designing spring supported TG foundation. Major TG manufacturers like ALSTOM, SEIMENS and Mitsubishi all provided their foundation designer design guidelines, which are described in this paper. Finally, a design case is introduced to show the importance of displacement and deformation calculation during the design of spring elements.
2015, 2(S1): 119-122.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.026
Abstract:
turbo generator is the heart of the power plant, and is a precision instrument for high speed operation. In order to ensure the normal operation of the turbo generator, as the foundation of its supporting structure, the design requirement (especially settlement control) is very high. The settlement calculation method provided by the foundation design specification is applicable to the independent foundation, and the calculation result is a settlement of a point, which is not suitable for the turbine generator foundation. There are three parts in this paper. First, through appropriate assumption, the settlement calculation method based on the independent foundation is extended to other arbitrary foundation forms. Second, based on the actual engineering practice example, the design method based on the above assumptions is shown; third, the author tries to simplify the design process, and to establish a more general standard for the eccentric design of dynamic machine and other building and structure, which is sensitive to uneven settlement.
turbo generator is the heart of the power plant, and is a precision instrument for high speed operation. In order to ensure the normal operation of the turbo generator, as the foundation of its supporting structure, the design requirement (especially settlement control) is very high. The settlement calculation method provided by the foundation design specification is applicable to the independent foundation, and the calculation result is a settlement of a point, which is not suitable for the turbine generator foundation. There are three parts in this paper. First, through appropriate assumption, the settlement calculation method based on the independent foundation is extended to other arbitrary foundation forms. Second, based on the actual engineering practice example, the design method based on the above assumptions is shown; third, the author tries to simplify the design process, and to establish a more general standard for the eccentric design of dynamic machine and other building and structure, which is sensitive to uneven settlement.
2015, 2(S1): 123-127,49.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.027
Abstract:
Circulating water pump house open caisson of a larger thermal power plant is built on a 20~30m depth soft soil layer. Use cement mixing piles under the blade feet for controlling open caisson sinking, and pile cement mixing piles around the open caisson in case water and mud flow into the open caisson. Pump room ground treatment uses rigid pipe pile foundation treatment scheme, at the same time, uses lattice type cement mixing pile to protect pipe pile foundation. This paper introduces the design of large pump house open caisson and controlling sinking in deep soft soil layer in details. It could provide a reference for similar engineering and construction.
Circulating water pump house open caisson of a larger thermal power plant is built on a 20~30m depth soft soil layer. Use cement mixing piles under the blade feet for controlling open caisson sinking, and pile cement mixing piles around the open caisson in case water and mud flow into the open caisson. Pump room ground treatment uses rigid pipe pile foundation treatment scheme, at the same time, uses lattice type cement mixing pile to protect pipe pile foundation. This paper introduces the design of large pump house open caisson and controlling sinking in deep soft soil layer in details. It could provide a reference for similar engineering and construction.
2015, 2(S1): 128-130.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.028
Abstract:
For power plant, there are all kinds of water basins, many of which are underground. When the unground water level is high, anti-floating design of underground water basins is another technique except anti-seepage. When the anti-floating capacity of basins is not enough due to the design or construction, the basins might float or overall unstability, accident such as upper deflection or crack of bottom slab might happen. The accident will take influence to the normal usage of other buildings and increase the maintenance cost. In this paper, caparison between different anti-floating design options of the project is made and a new anti-floating design for large underground water basin is provided to reduce the project cost and shorten the construction period. The application of new anti-floating design will provide design method and experience for similar projects.
For power plant, there are all kinds of water basins, many of which are underground. When the unground water level is high, anti-floating design of underground water basins is another technique except anti-seepage. When the anti-floating capacity of basins is not enough due to the design or construction, the basins might float or overall unstability, accident such as upper deflection or crack of bottom slab might happen. The accident will take influence to the normal usage of other buildings and increase the maintenance cost. In this paper, caparison between different anti-floating design options of the project is made and a new anti-floating design for large underground water basin is provided to reduce the project cost and shorten the construction period. The application of new anti-floating design will provide design method and experience for similar projects.
2015, 2(S1): 131-134.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.029
Abstract:
China's thermal power plant construction has been a peak, plant site resources is more and more less after the peak. Good site resources has basically been used, most of the site resources which are reserved are poor conditions, many of which are located in remote and a mountainous area. The natural elevation difference of site is larger, the specific performance is large amount of earthwork, slope and retaining wall project, more site step etc. In mountainous area of thermal power plant, fine design on the general layout, can reduce earthwork, slope and retaining wall project, reduce the plant area, and reduce the removing project, bring great economic benefit and social benefit.
China's thermal power plant construction has been a peak, plant site resources is more and more less after the peak. Good site resources has basically been used, most of the site resources which are reserved are poor conditions, many of which are located in remote and a mountainous area. The natural elevation difference of site is larger, the specific performance is large amount of earthwork, slope and retaining wall project, more site step etc. In mountainous area of thermal power plant, fine design on the general layout, can reduce earthwork, slope and retaining wall project, reduce the plant area, and reduce the removing project, bring great economic benefit and social benefit.
2015, 2(S1): 135-139.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.030
Abstract:
By the project, the author tries to analyze the design characteristics of "large power plant replace small one" rebuild project on fixed site, especially on site utilized, the utilized and rebuild establishments of the old power plant, the influences on the power plant, the relations of this rebuild project and the old power plant, and so on. At last, the characteristics of the rebuild project layout are summarized. The author wishes to exchange each other.
By the project, the author tries to analyze the design characteristics of "large power plant replace small one" rebuild project on fixed site, especially on site utilized, the utilized and rebuild establishments of the old power plant, the influences on the power plant, the relations of this rebuild project and the old power plant, and so on. At last, the characteristics of the rebuild project layout are summarized. The author wishes to exchange each other.
2015, 2(S1): 140-142.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.031
Abstract:
The same and different points of basic wind speed were obtained after analyzing the elements of basic wind speed such as category of ground surface roughness, standard height, mean recurrence interval, time interval etc. in Chinese code and Bangladesh code. Based on comparison and analysis results of basic wind speed, further discussion was made to the conversion of basic wind speed in the two different codes. Furthermore, by the comparison and analysis between the seismic design codes of China and Bangladesh about peak ground acceleration, exceedance probability, the seismic fortification objective of buildings etc., the conversion relationships between the parameters of ground motions in Chinese code and Bangladesh code are proposed to provide. Hope to give some reference for wind load and seismic design of overseas projects in the future.
The same and different points of basic wind speed were obtained after analyzing the elements of basic wind speed such as category of ground surface roughness, standard height, mean recurrence interval, time interval etc. in Chinese code and Bangladesh code. Based on comparison and analysis results of basic wind speed, further discussion was made to the conversion of basic wind speed in the two different codes. Furthermore, by the comparison and analysis between the seismic design codes of China and Bangladesh about peak ground acceleration, exceedance probability, the seismic fortification objective of buildings etc., the conversion relationships between the parameters of ground motions in Chinese code and Bangladesh code are proposed to provide. Hope to give some reference for wind load and seismic design of overseas projects in the future.
2015, 2(S1): 143-146,177.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.032
Abstract:
With the deepening of electric system reform, keeping equipment operating efficiently, enhancing labor productivity, increasing economic benefits have turned to be target of power plant development. The automation level of the Balance of Plant (BOP) has a direct influence on plant's economic benefits, as BOP's process automation plays a crucial role in the whole plant. Basing on current BOP centralized control system, whose net structure and control mode has been elaborated studied and optimized, a reliable control mode with national conditions is proposed in this paper.
With the deepening of electric system reform, keeping equipment operating efficiently, enhancing labor productivity, increasing economic benefits have turned to be target of power plant development. The automation level of the Balance of Plant (BOP) has a direct influence on plant's economic benefits, as BOP's process automation plays a crucial role in the whole plant. Basing on current BOP centralized control system, whose net structure and control mode has been elaborated studied and optimized, a reliable control mode with national conditions is proposed in this paper.
2015, 2(S1): 147-150.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.033
Abstract:
Diverse communication facilities form bi-directional data network, providing commincation guarantee for the effective and reliable grid performance. Considering the operation and maintenance of communication network in Yunnan power grid, this paper proposes an evaluation approach of communication facilities. This approach grade the status in aspects of operation, environment and auxiliary factors. The simple and practical approach gives valuable reference for faciliy operation and maintenance.
Diverse communication facilities form bi-directional data network, providing commincation guarantee for the effective and reliable grid performance. Considering the operation and maintenance of communication network in Yunnan power grid, this paper proposes an evaluation approach of communication facilities. This approach grade the status in aspects of operation, environment and auxiliary factors. The simple and practical approach gives valuable reference for faciliy operation and maintenance.
2015, 2(S1): 151-154.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.034
Abstract:
The power of the business systems and devices require time synchronization, study PTN network set up 1588 time synchronization network specific programs, and PTN network time synchronization performance testing, test results fully able to meet the operational time of the power system synchronization accuracy requirements.
The power of the business systems and devices require time synchronization, study PTN network set up 1588 time synchronization network specific programs, and PTN network time synchronization performance testing, test results fully able to meet the operational time of the power system synchronization accuracy requirements.
2015, 2(S1): 155-160.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.035
Abstract:
With the continuous development of electric power information technology, the construction of large capacity, high bandwidth OTN network by electric power enterprises has become a trend. According to the Guangdong power OTN network's engineering characteristics, this papar gives an analysis on network structure, cross technology, network protection, and it selects a three-layer structure including the core layer, backbone layer and access layer, the backbone layer uses OPGW to build MESH network based on power grid structures. There are no less than 2 connections between backbone layer and core layer, the same to backbone layer and access layer, which improves the network reliability besides controling the investment. This paper also gives the technology choice of the cross technology and the network protection, giving reference to OTN network construction by electric power enterprises. At the end, this paper gives an application case using OTN idle channels to provide emergency support for Guangdong power grid, which in the typhoon prone area.
With the continuous development of electric power information technology, the construction of large capacity, high bandwidth OTN network by electric power enterprises has become a trend. According to the Guangdong power OTN network's engineering characteristics, this papar gives an analysis on network structure, cross technology, network protection, and it selects a three-layer structure including the core layer, backbone layer and access layer, the backbone layer uses OPGW to build MESH network based on power grid structures. There are no less than 2 connections between backbone layer and core layer, the same to backbone layer and access layer, which improves the network reliability besides controling the investment. This paper also gives the technology choice of the cross technology and the network protection, giving reference to OTN network construction by electric power enterprises. At the end, this paper gives an application case using OTN idle channels to provide emergency support for Guangdong power grid, which in the typhoon prone area.
2015, 2(S1): 161-164.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.036
Abstract:
This paper analyzes PTN security access and network capacity from a business transfer process, proposed PTN network security capabilities, although higher than the average of data network equipment, but also belong to the logical isolation in nature. Proposed wide-area control and protection business is power production control class of business, can not be used PTN network management business mix with other bearer.
This paper analyzes PTN security access and network capacity from a business transfer process, proposed PTN network security capabilities, although higher than the average of data network equipment, but also belong to the logical isolation in nature. Proposed wide-area control and protection business is power production control class of business, can not be used PTN network management business mix with other bearer.
2015, 2(S1): 165-168.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.037
Abstract:
Rapid restoration system has been lack of adequate technical support to low voltage fault location ever since. This paper design and realize a fault location technology analysis and rapid restoration system, basing on data which provided by grid model of information integration platform and fault information from distribution network automation system, and variable terminal real-time information. According to the user alarm information, fault information and terminal data, this system can automatically find out low-voltage fault location, offer technical support to customer service first-hand blackout range information, also support effective guide to salvage crews restoring electricity. Research results set an example and apply in Zhongshan power supply bureau, and the effect is good.
Rapid restoration system has been lack of adequate technical support to low voltage fault location ever since. This paper design and realize a fault location technology analysis and rapid restoration system, basing on data which provided by grid model of information integration platform and fault information from distribution network automation system, and variable terminal real-time information. According to the user alarm information, fault information and terminal data, this system can automatically find out low-voltage fault location, offer technical support to customer service first-hand blackout range information, also support effective guide to salvage crews restoring electricity. Research results set an example and apply in Zhongshan power supply bureau, and the effect is good.
2015, 2(S1): 169-171.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.038
Abstract:
Equipped with power grid automation launched a comprehensive pilot work in the country, has achieved initial results. In the pilot, the communication network has adopted the technology route of optical fiber communication, carrier and wireless assistant. But there are obvious defects in the above technology. This paper will in the description of the principle and the technical characteristics of a new generation of carrier communication technology based on proposed application in intelligent equipped with grid communication better comprehensive solution model
Equipped with power grid automation launched a comprehensive pilot work in the country, has achieved initial results. In the pilot, the communication network has adopted the technology route of optical fiber communication, carrier and wireless assistant. But there are obvious defects in the above technology. This paper will in the description of the principle and the technical characteristics of a new generation of carrier communication technology based on proposed application in intelligent equipped with grid communication better comprehensive solution model
2015, 2(S1): 172-177.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.039
Abstract:
In this paper, two kinds of cooling solutions for data center are studied and analyzed from the comparison of the theoretical and practical aspects of the advantages, cost and power consumption. In the end,the paper expounds that the row-oriented cooling will be the optimal solution for the high power-density data center through comparative analysis.
In this paper, two kinds of cooling solutions for data center are studied and analyzed from the comparison of the theoretical and practical aspects of the advantages, cost and power consumption. In the end,the paper expounds that the row-oriented cooling will be the optimal solution for the high power-density data center through comparative analysis.
2015, 2(S1): 178-182.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.040
Abstract:
This paper is focus on material properties of steel mill ball and give a completed definition of reduce ball technology. Then the application of high-Cr steel ball was introduced. The performance and price of steel mill balls have a very different in the market. An economic research was studied according to a project case for different steel mill balls. The suggestion of steel ball and lining board selection were presented in this article.
This paper is focus on material properties of steel mill ball and give a completed definition of reduce ball technology. Then the application of high-Cr steel ball was introduced. The performance and price of steel mill balls have a very different in the market. An economic research was studied according to a project case for different steel mill balls. The suggestion of steel ball and lining board selection were presented in this article.
2015, 2(S1): 183-186.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.041
Abstract:
The investment control index of feasibility study has an important role in estimating the investment of power grid, calculating the cost of preliminary work and auditing the investment of the project. To promote the precision of the investment control index of substations and make that index practical, this paper applies the modularization design concept to measure and calculate the investment of substations on feasibility study. The result show that: the modularization design concept could be applied into achieving the accuracy of the predictions.
The investment control index of feasibility study has an important role in estimating the investment of power grid, calculating the cost of preliminary work and auditing the investment of the project. To promote the precision of the investment control index of substations and make that index practical, this paper applies the modularization design concept to measure and calculate the investment of substations on feasibility study. The result show that: the modularization design concept could be applied into achieving the accuracy of the predictions.
2015, 2(S1): 187-192.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.042
Abstract:
Data from 26 national reference weather stations, 101 regional automatic weather stations and 6 ocean observation stations in Guangdong coastal area are collected. Inverse Distance Weighting scheme, Cressman Interpolation scheme, Radial Basis Function scheme and Kriging method are then empolyed to study the continuous extreme wind speed distribution spatial interpolation experiment of 10 min averaged extreme wind speed at 10 meters above ground with a return peroid of 50 years. Cross-validation shows that the Mean Absolute Error of Cressman Interpolation is least while Universe Kriging interpolation lead to the least Root-Mean-Square Error and the best correlation coefficient. It is indicated that Universe Kriging interpolation is more appropriate for extreme wind speed spatial interpolation in Guangdong coastal area.
Data from 26 national reference weather stations, 101 regional automatic weather stations and 6 ocean observation stations in Guangdong coastal area are collected. Inverse Distance Weighting scheme, Cressman Interpolation scheme, Radial Basis Function scheme and Kriging method are then empolyed to study the continuous extreme wind speed distribution spatial interpolation experiment of 10 min averaged extreme wind speed at 10 meters above ground with a return peroid of 50 years. Cross-validation shows that the Mean Absolute Error of Cressman Interpolation is least while Universe Kriging interpolation lead to the least Root-Mean-Square Error and the best correlation coefficient. It is indicated that Universe Kriging interpolation is more appropriate for extreme wind speed spatial interpolation in Guangdong coastal area.
2015, 2(S1): 193-197.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.043
Abstract:
Linear regression analysis, anomaly value analysis, five-year moving average method and Mann-Kendall method are used to analyze the variation characteristics of global solar irradiance and sunshine duration in Wanshan islands area. Results show that the global solar irradiance has a slightly increasing trend, and monthly global solar irradiance has a unimodal distribution with the highest value in July and lowest value in February. The sunshine duration has a slightly downward trend, and monthly sunshine duration shows a bimodal distribution with the highest value in July and lowest value in March. Analysis and evaluation results of solar energy resource of Wanshan islands show that the average value of global solar irradiance is 4996.25 MJ/m2, which is abundant in solar energy resource. The stability of solar energy resources is 3.7, which is fairly stable.
Linear regression analysis, anomaly value analysis, five-year moving average method and Mann-Kendall method are used to analyze the variation characteristics of global solar irradiance and sunshine duration in Wanshan islands area. Results show that the global solar irradiance has a slightly increasing trend, and monthly global solar irradiance has a unimodal distribution with the highest value in July and lowest value in February. The sunshine duration has a slightly downward trend, and monthly sunshine duration shows a bimodal distribution with the highest value in July and lowest value in March. Analysis and evaluation results of solar energy resource of Wanshan islands show that the average value of global solar irradiance is 4996.25 MJ/m2, which is abundant in solar energy resource. The stability of solar energy resources is 3.7, which is fairly stable.
2015, 2(S1): 198-202.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.044
Abstract:
Shallow landslide induced by rainstorm can pose great threats to public safety and social and econormic development, but the knowledge of shallow landslide formation mechanism is limited so far. There is no reilable analysis method on shallow landslide hazard. In this paper, hydrodynamic model of heavy rainfall-induced flash flood is developed. The model can better simulate the hydrological processes of rainstorm runoff, convergence and infiltration, etc. The rainstorm hydrodynamic landslide model is used to assess rainstorm-induced shallow landslide hazard, with the limit equilibrium method of slope. The model has been applied to a typical shallow landslide-prone area. The calculation results show that the hydrodynamic model can better simulate the process of rainfall infiltration, the assessment of shallow landslide hazard, based on the model, is more reasonable. It provided a new technology to defense effectively rainstorm-induced shallow landslide.
Shallow landslide induced by rainstorm can pose great threats to public safety and social and econormic development, but the knowledge of shallow landslide formation mechanism is limited so far. There is no reilable analysis method on shallow landslide hazard. In this paper, hydrodynamic model of heavy rainfall-induced flash flood is developed. The model can better simulate the hydrological processes of rainstorm runoff, convergence and infiltration, etc. The rainstorm hydrodynamic landslide model is used to assess rainstorm-induced shallow landslide hazard, with the limit equilibrium method of slope. The model has been applied to a typical shallow landslide-prone area. The calculation results show that the hydrodynamic model can better simulate the process of rainfall infiltration, the assessment of shallow landslide hazard, based on the model, is more reasonable. It provided a new technology to defense effectively rainstorm-induced shallow landslide.
2015, 2(S1): 203-206.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.045
Abstract:
Oblique photography is a new technology that developed recent years in the area of surveying and mapping. It can demonstrate the 3D environment more realistic than ortho-photo. The results of the image can be used in measuring height, length, acreage, volume, angle and gradient, etc. In the meanwhile, it can cut the cost of 3D modeling by bulk texture mapping. This research uses oblique photography in the application of UHV transmission line optimization, provides intuitive and accurate 3D data for the optimizing and ranking of UHV transmission lines, as well as the decision-making basis for the electric power line design.
Oblique photography is a new technology that developed recent years in the area of surveying and mapping. It can demonstrate the 3D environment more realistic than ortho-photo. The results of the image can be used in measuring height, length, acreage, volume, angle and gradient, etc. In the meanwhile, it can cut the cost of 3D modeling by bulk texture mapping. This research uses oblique photography in the application of UHV transmission line optimization, provides intuitive and accurate 3D data for the optimizing and ranking of UHV transmission lines, as well as the decision-making basis for the electric power line design.
2015, 2(S1): 207-211,229.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.046
Abstract:
The paper mainly introduced the data process and analysis method about sensor corrected (SC) level images of China high resolution ZY-3 survey satellite, including the method of high precision DEM process using the stereo image and CORS image control points, and the method of orthophoto image process using DEM and image control points. And then it used Guangzhou as the test region, and had accuracy analysis and verification of products using the method it presented. Based on the results, it discussed the ZY-3 satellite image feasibility and applicability in electrical power engineering.
The paper mainly introduced the data process and analysis method about sensor corrected (SC) level images of China high resolution ZY-3 survey satellite, including the method of high precision DEM process using the stereo image and CORS image control points, and the method of orthophoto image process using DEM and image control points. And then it used Guangzhou as the test region, and had accuracy analysis and verification of products using the method it presented. Based on the results, it discussed the ZY-3 satellite image feasibility and applicability in electrical power engineering.
2015, 2(S1): 212-217,225.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.047
Abstract:
Based on the operating characteristics and maintenance strategies of secondary equipment, This paper constructs a lifecycle technical transformation policy model of secondary device using fixed benefit method, analyzed secondary equipment life cycle costs,determine the quantitative calculation method, and the evaluation index and evaluation standard of fixed benefit method. Finally, this paper conducted a Examples Analysis using the Automation System Data of Guangdong power grid.
Based on the operating characteristics and maintenance strategies of secondary equipment, This paper constructs a lifecycle technical transformation policy model of secondary device using fixed benefit method, analyzed secondary equipment life cycle costs,determine the quantitative calculation method, and the evaluation index and evaluation standard of fixed benefit method. Finally, this paper conducted a Examples Analysis using the Automation System Data of Guangdong power grid.
2015, 2(S1): 218-221.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.048
Abstract:
The standards of different versions on return period, reference height and maximum design wind speed for overhead distributed net were compared in this paper. This comparison showed that the design standards on windbreak of designed distributed nets have been gradually advanced. Then, the calculation for the typical straight-line pole and the angle pole showed that in this current standard, the design base moment of the reinforced concrete pole has been increased. Finally, some measures of windbreak for distributed nets were advised.
The standards of different versions on return period, reference height and maximum design wind speed for overhead distributed net were compared in this paper. This comparison showed that the design standards on windbreak of designed distributed nets have been gradually advanced. Then, the calculation for the typical straight-line pole and the angle pole showed that in this current standard, the design base moment of the reinforced concrete pole has been increased. Finally, some measures of windbreak for distributed nets were advised.
2015, 2(S1): 222-225.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.049
Abstract:
With the advent of the era of big data, data is considered to be an important factor of production. Great importance has been attached to improving the management level of unstructured data by the power grid enterprises. This paper analyzes the current situation of the management of the unstructured data in the power grid enterprises, and proposes to construct the unstructured data management platform based on the big data technology. The platform uses the Hadoop parallel distributed computing architecture and the hybrid storage architecture. This paper describes the technical architecture and application architecture, and discusses the advanced nature of the technical architecture in the power grid enterprise.
With the advent of the era of big data, data is considered to be an important factor of production. Great importance has been attached to improving the management level of unstructured data by the power grid enterprises. This paper analyzes the current situation of the management of the unstructured data in the power grid enterprises, and proposes to construct the unstructured data management platform based on the big data technology. The platform uses the Hadoop parallel distributed computing architecture and the hybrid storage architecture. This paper describes the technical architecture and application architecture, and discusses the advanced nature of the technical architecture in the power grid enterprise.
2015, 2(S1): 226-229.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.050
Abstract:
EPC(Engineering Procurement Construction) is the mainstream pattern of international engineering construction. It is the development trend of engineering construction in our country. Under the circumstances of One Belt And One Road (OBAOR), EPC is more significant. But there are still many urgent problems in the actual, restricting its development. Through the analysis of these problems, this article put forward that in order to play the advantages of EPC and achieve a win-win situation, the regime, concepts and processes should be adjusted continuously.
EPC(Engineering Procurement Construction) is the mainstream pattern of international engineering construction. It is the development trend of engineering construction in our country. Under the circumstances of One Belt And One Road (OBAOR), EPC is more significant. But there are still many urgent problems in the actual, restricting its development. Through the analysis of these problems, this article put forward that in order to play the advantages of EPC and achieve a win-win situation, the regime, concepts and processes should be adjusted continuously.
2015, 2(S1): 230-233.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.051
Abstract:
Introduce the engineering characteristics of coal-fired power plants project briefly and choose a theoretical calculation model-bid section division model based on the theory of transaction cost. Use the bid section division model based on the theory of transaction costs to calculate the result of DUYEN HAI 1 THERMAL POWER PLANT PROJECT's bid sections division, discuss the advantage and disadvantage of this model and put forward the improvement of the theoretical calculation model in actual application.
Introduce the engineering characteristics of coal-fired power plants project briefly and choose a theoretical calculation model-bid section division model based on the theory of transaction cost. Use the bid section division model based on the theory of transaction costs to calculate the result of DUYEN HAI 1 THERMAL POWER PLANT PROJECT's bid sections division, discuss the advantage and disadvantage of this model and put forward the improvement of the theoretical calculation model in actual application.
2015, 2(S1): 234-238.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.052
Abstract:
This paper is aimed at the contradiction between the security and convenience of data access security and convenience in the enterprise information system. The 4A subsystem of the enhanced function with multiple authentication is designed and implemented in this paper for the role of user authority control. By the the construction of corporate identity, authority, certification, audit 4 system, the user in a log process only need one step and system automaticly carry on authentication operation. It uses smart strategy to autoconfigure the system, guarantee the authentication strengeh of resources, effectively ensure the data access security and simplify the loging procedure.
This paper is aimed at the contradiction between the security and convenience of data access security and convenience in the enterprise information system. The 4A subsystem of the enhanced function with multiple authentication is designed and implemented in this paper for the role of user authority control. By the the construction of corporate identity, authority, certification, audit 4 system, the user in a log process only need one step and system automaticly carry on authentication operation. It uses smart strategy to autoconfigure the system, guarantee the authentication strengeh of resources, effectively ensure the data access security and simplify the loging procedure.
2015, 2(S1): 239-243.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.053
Abstract:
Based on the analysis of practical project in electric power engineering community,This paper studied and analyzed many issues including the model of prefabricated building, material application, its cost keeping and construction period. mainly discussing the prefabricated Building design, technical difficulties and construction points of Electric Power Engineering, aiming to provide reference for popularization and application of prefabricated building in electric power engineering community.
Based on the analysis of practical project in electric power engineering community,This paper studied and analyzed many issues including the model of prefabricated building, material application, its cost keeping and construction period. mainly discussing the prefabricated Building design, technical difficulties and construction points of Electric Power Engineering, aiming to provide reference for popularization and application of prefabricated building in electric power engineering community.
2015, 2(S1): 244-248.
doi: 10.16516/j.gedi.issn2095-8676.2015.S1.054
Abstract:
With the development of electric power, capacitance of power grid grows faster, short-circuit current increase year by year, many equipments of substation are unable to meet the requirements of safety operation so that these substations require retrofit. Power-off retrofit for center substation will have great influence on the power grid and cost a lot; On the basis of analyzing the characteristic and the key point of live retrofit in 500 kV Jiangmen substation, an approach to solve the difficulties of live retrofit is proposed in this paper to lay the foundation for the safety of substation live retrofit.
With the development of electric power, capacitance of power grid grows faster, short-circuit current increase year by year, many equipments of substation are unable to meet the requirements of safety operation so that these substations require retrofit. Power-off retrofit for center substation will have great influence on the power grid and cost a lot; On the basis of analyzing the characteristic and the key point of live retrofit in 500 kV Jiangmen substation, an approach to solve the difficulties of live retrofit is proposed in this paper to lay the foundation for the safety of substation live retrofit.
