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RSS2016 Vol. 3, No. S1
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2016, 3(S1): 1-4,13.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.001
Abstract:
Traditional architectures of decision support system are most based on database cluster of SMP or MPP with a high cost of storage and computing. It is difficult to expand, and the performance bottleneck of large scale offline computing and streaming computing. By analyzing the challenges of DSS, this paper puts forward a fusion architecture of DSS based on big data, which satisfies the requirements of relational operations, large-scale offline distributed computing and streaming computing. It supports the analysis and processing of structured data, semi-structured data and unstructured data.
Traditional architectures of decision support system are most based on database cluster of SMP or MPP with a high cost of storage and computing. It is difficult to expand, and the performance bottleneck of large scale offline computing and streaming computing. By analyzing the challenges of DSS, this paper puts forward a fusion architecture of DSS based on big data, which satisfies the requirements of relational operations, large-scale offline distributed computing and streaming computing. It supports the analysis and processing of structured data, semi-structured data and unstructured data.
2016, 3(S1): 5-8,13.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.002
Abstract:
The distribution network planning method based on grid meshing can solve the contradiction between large size of urban distribution network and request of fine plan. This method has been applied to practical urban distribution network planning. As meshing has the purpose of completing target-network construction for long-term planning, ealuation for target-network is the priority key step of meshing planning. This article put forward a evaluation index system for evaluating distribution network meshing planning in several dimensions. It is an analytic hierarchy process (AHP) based on Hausdauff Distance, and a target-network planning evaluating model in quantity conbined with Technique for order preference by similarity to ideal solution (TOPSIS). This process overcome the shortcoming of limitation on practice for traditional AHP. On this basis, the target-network planning for Guangzhou Zhujiang newtown is evaluated in quantity.
The distribution network planning method based on grid meshing can solve the contradiction between large size of urban distribution network and request of fine plan. This method has been applied to practical urban distribution network planning. As meshing has the purpose of completing target-network construction for long-term planning, ealuation for target-network is the priority key step of meshing planning. This article put forward a evaluation index system for evaluating distribution network meshing planning in several dimensions. It is an analytic hierarchy process (AHP) based on Hausdauff Distance, and a target-network planning evaluating model in quantity conbined with Technique for order preference by similarity to ideal solution (TOPSIS). This process overcome the shortcoming of limitation on practice for traditional AHP. On this basis, the target-network planning for Guangzhou Zhujiang newtown is evaluated in quantity.
2016, 3(S1): 9-13.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.003
Abstract:
Investment optimization according to technological rationality and investment benefit of projects is an critical issue as the huge investment in construction of distribution system. In this paper, an index system is established for quantitative evaluation of construction projects in distribution system from the aspects of technical rationality and economic rationality. Furthermore, a mixed weighting method based on the ahp and entropy method is proposed for comprehensive evaluation of priority of different projects, so a quantitative basis can be provided for investment optimization in distribution system construction.
Investment optimization according to technological rationality and investment benefit of projects is an critical issue as the huge investment in construction of distribution system. In this paper, an index system is established for quantitative evaluation of construction projects in distribution system from the aspects of technical rationality and economic rationality. Furthermore, a mixed weighting method based on the ahp and entropy method is proposed for comprehensive evaluation of priority of different projects, so a quantitative basis can be provided for investment optimization in distribution system construction.
2016, 3(S1): 14-17.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.004
Abstract:
In this article, based on the heat balance diagram of 1 000 MW ultra-supercritical coal-fired unit, through calculating &analyzing the influence of HP heater superheated steam cooling section outlet design temperature on HP heater heat transfer area and HP heater upper terminal difference; and influence of HP heater terminal difference(upper/lower) on heat transfer area, unit heat consumption value, has presented the HP heater upper terminal difference should not be set to -2℃ according to the specification, but determined by calculation on specific project conditions, and has provided reference for energy conservation of power units.
In this article, based on the heat balance diagram of 1 000 MW ultra-supercritical coal-fired unit, through calculating &analyzing the influence of HP heater superheated steam cooling section outlet design temperature on HP heater heat transfer area and HP heater upper terminal difference; and influence of HP heater terminal difference(upper/lower) on heat transfer area, unit heat consumption value, has presented the HP heater upper terminal difference should not be set to -2℃ according to the specification, but determined by calculation on specific project conditions, and has provided reference for energy conservation of power units.
2016, 3(S1): 18-21.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.005
Abstract:
Optimization design of chiller capacity allocation between the steam double effect Libr unit and electricity-powered chiller has been analyzed in supply cooling system in energy station. And several simulation models had been set up for several typical buildings based on DeST software, and the all-around year hourly cooling load had been calculated. Considering the initial investment and the annual operating cost, the life cycle cost (LCC) method had been adopted to analysis the optimization design of chiller capacity allocation between steam double effect LiBr unit and electricity-powered chiller for the energy station. And the calculated results shown that the optimized LiBr unit ratio is 61.8% in the typical condition. Then, the effects of COP of electricity-powered chiller and steam price on the chiller capacity allocation had been researched, the results shown that the optimized LiBr unit ratio is decrease along with the increase of the COP, and is also decrease along with the increase of the steam price. And this paper can provide the reference for optimization design of chiller capacity allocation for supply cooling system in the similar energy station.
Optimization design of chiller capacity allocation between the steam double effect Libr unit and electricity-powered chiller has been analyzed in supply cooling system in energy station. And several simulation models had been set up for several typical buildings based on DeST software, and the all-around year hourly cooling load had been calculated. Considering the initial investment and the annual operating cost, the life cycle cost (LCC) method had been adopted to analysis the optimization design of chiller capacity allocation between steam double effect LiBr unit and electricity-powered chiller for the energy station. And the calculated results shown that the optimized LiBr unit ratio is 61.8% in the typical condition. Then, the effects of COP of electricity-powered chiller and steam price on the chiller capacity allocation had been researched, the results shown that the optimized LiBr unit ratio is decrease along with the increase of the COP, and is also decrease along with the increase of the steam price. And this paper can provide the reference for optimization design of chiller capacity allocation for supply cooling system in the similar energy station.
2016, 3(S1): 22-26.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.006
Abstract:
At present, Boiler feedwater pump in thermal power plant is generally adopts hydraulic coupler as adjusting device; However, due to the limitations of the mechanical structure and regulation of hydraulic coupling, hydraulic coupler is low efficiency with small adjustable range. With the development of science and technology, a variety of new regulating device can be used as adjusting device for boiler feedwater pump.This paper mainly introduces principle, performance, renovation plan and cost for the planetary gear torque speed (VORECON) and Variable Frequency Drive (VFDS); The detailed comparison of effect and cost of two solutions is given by actual cases.Through a series of contrast analysis, this paper consider that Variable Frequency Drive solution is better than the planetary gear torque speed solution.
At present, Boiler feedwater pump in thermal power plant is generally adopts hydraulic coupler as adjusting device; However, due to the limitations of the mechanical structure and regulation of hydraulic coupling, hydraulic coupler is low efficiency with small adjustable range. With the development of science and technology, a variety of new regulating device can be used as adjusting device for boiler feedwater pump.This paper mainly introduces principle, performance, renovation plan and cost for the planetary gear torque speed (VORECON) and Variable Frequency Drive (VFDS); The detailed comparison of effect and cost of two solutions is given by actual cases.Through a series of contrast analysis, this paper consider that Variable Frequency Drive solution is better than the planetary gear torque speed solution.
2016, 3(S1): 27-30.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.007
Abstract:
Wet electrostatic precipitator is terminal flue gas purification equipment which can remove PM2.5, SO3, and heavy metals effectively in coal fired power plant. The working principle, classification, technical features, the application in coal-fired power plants at home and abroad, and the improvement on the introduced WESP technology were introduced in detail. WESP will be more widely used in coal-fired power plants.
Wet electrostatic precipitator is terminal flue gas purification equipment which can remove PM2.5, SO3, and heavy metals effectively in coal fired power plant. The working principle, classification, technical features, the application in coal-fired power plants at home and abroad, and the improvement on the introduced WESP technology were introduced in detail. WESP will be more widely used in coal-fired power plants.
2016, 3(S1): 31-34.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.008
Abstract:
The measuring accuracy of the coal mill inlet air flow rate is very important to the safety, stability and economic operation of the boiler. In this investigation we analyses the characteristics of various coal mill air flow measurement device of the positive pressure direct injection system, and the requirement of air duct before and after the straight section.We research various air duct layout scheme of the flow measurement device and provide the optimized layout scheme.The results shown that we shall select the measurement device with good performance at design time,and ensure the layout design of the straight section length, at the same time need to consider a cold mixed length, and try to create a favorable operating conditions for the air flow measuring device.
The measuring accuracy of the coal mill inlet air flow rate is very important to the safety, stability and economic operation of the boiler. In this investigation we analyses the characteristics of various coal mill air flow measurement device of the positive pressure direct injection system, and the requirement of air duct before and after the straight section.We research various air duct layout scheme of the flow measurement device and provide the optimized layout scheme.The results shown that we shall select the measurement device with good performance at design time,and ensure the layout design of the straight section length, at the same time need to consider a cold mixed length, and try to create a favorable operating conditions for the air flow measuring device.
2016, 3(S1): 35-38,50.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.009
Abstract:
In the production process of thermal power plant, measurement precision requirement of heating media flow measurement for charge is high, and the heating media flow range is very large. General flow measurement scheme could not meet the requirements of precise measurement for such heating media flow. To solve this problem, this paper introduced several common flow measurement schemes, and proposed precise heating media flow measurement schemes and cost for several common conditions. Those schemes have been applied for several engineering. Effect of this proposes is satisfied. Those schemes can be used widely in thermal power plants for similar applications.
In the production process of thermal power plant, measurement precision requirement of heating media flow measurement for charge is high, and the heating media flow range is very large. General flow measurement scheme could not meet the requirements of precise measurement for such heating media flow. To solve this problem, this paper introduced several common flow measurement schemes, and proposed precise heating media flow measurement schemes and cost for several common conditions. Those schemes have been applied for several engineering. Effect of this proposes is satisfied. Those schemes can be used widely in thermal power plants for similar applications.
2016, 3(S1): 39-42.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.010
Abstract:
Lithium battery has many excellent features, especially in high-power or high-capacity battery has a good charge-discharge characteristics and thermal stability, causing widespread concern in all walks of life. In this paper, the application of lithium iron phosphate in power system, combined with its working principle and technical characteristics, analysis of lithium battery in the future application prospects, put forward the work of lithium power system in the work of the proposed recommendations.
Lithium battery has many excellent features, especially in high-power or high-capacity battery has a good charge-discharge characteristics and thermal stability, causing widespread concern in all walks of life. In this paper, the application of lithium iron phosphate in power system, combined with its working principle and technical characteristics, analysis of lithium battery in the future application prospects, put forward the work of lithium power system in the work of the proposed recommendations.
2016, 3(S1): 43-50.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.011
Abstract:
One of the emission technologies of smoke tower is to use the huge heat enthalpy of cooling tower to lift the smoke into the atmosphere, and the effect is better than that of the traditional chimney. In this paper, through the study of Southern China high temperature and high humidity area atmospheric environment, topography and other factors after the technology of flue gas emissions on the surrounding environment of the smoke tower, and quasi conditions using cooling tower emissions assessment (Froude) method to determine the parameters of Froude, the number of monthly plan on the construction of each load is calculated and the calculation of the load the research project of flue gas emission influence on atmospheric environment by using modulus test method.
One of the emission technologies of smoke tower is to use the huge heat enthalpy of cooling tower to lift the smoke into the atmosphere, and the effect is better than that of the traditional chimney. In this paper, through the study of Southern China high temperature and high humidity area atmospheric environment, topography and other factors after the technology of flue gas emissions on the surrounding environment of the smoke tower, and quasi conditions using cooling tower emissions assessment (Froude) method to determine the parameters of Froude, the number of monthly plan on the construction of each load is calculated and the calculation of the load the research project of flue gas emission influence on atmospheric environment by using modulus test method.
2016, 3(S1): 51-54.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.012
Abstract:
In this paper nuclear power plants conventional island main steam system transient calculation under different conditions were analyzed. Through qualitative analysis and simulation results, obtains the steam hammer force of main steam system under different conditions. By comparing steam hammer loads of main steam valve in different conditions, get the maximum load condition. This paper mainly provides the way to choose main steam system transient calculation conditions.
In this paper nuclear power plants conventional island main steam system transient calculation under different conditions were analyzed. Through qualitative analysis and simulation results, obtains the steam hammer force of main steam system under different conditions. By comparing steam hammer loads of main steam valve in different conditions, get the maximum load condition. This paper mainly provides the way to choose main steam system transient calculation conditions.
2016, 3(S1): 55-60.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.013
Abstract:
One Nuclear Power Station No. 3 Unit reconstruction project has improved the transformer design due to No. 1&2 Units had ever suffered failures of the interconnecting transformer coil by VFTO, so the new No.3 interconnecting transformer should be fully considered the impact of VFTO to avoid the similar incidents. This article analyzed 10 routine operations about the VFTO impact to the equipment by using the ATP electromagnetic transient calculation program. The results shown that the overvoltage value near isolating switch is the highest, which is 2.95 p.u., the maximum overvoltage at the transformer entrance is 1.60 p.u., the insulation level of the equipment could fulfill the requirement of VFTO.
One Nuclear Power Station No. 3 Unit reconstruction project has improved the transformer design due to No. 1&2 Units had ever suffered failures of the interconnecting transformer coil by VFTO, so the new No.3 interconnecting transformer should be fully considered the impact of VFTO to avoid the similar incidents. This article analyzed 10 routine operations about the VFTO impact to the equipment by using the ATP electromagnetic transient calculation program. The results shown that the overvoltage value near isolating switch is the highest, which is 2.95 p.u., the maximum overvoltage at the transformer entrance is 1.60 p.u., the insulation level of the equipment could fulfill the requirement of VFTO.
2016, 3(S1): 61-67.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.014
Abstract:
Grouted connection of offshore wind turbine foundation is a key point in the design and construction process. The connection is affected by axial force, bending and coupling during the long-term operation of wind turbine. In this paper, the static mechanism of grouted connection is mainly studied from the aspects of axial compression and bending moment. Firstly, the axial compression mechanism of grouted connection with/without shear keys is described in detail, and then bending mechanism of the grouted connection is expounded. Finally, the static mechanism research of grouted connection is summarized.
Grouted connection of offshore wind turbine foundation is a key point in the design and construction process. The connection is affected by axial force, bending and coupling during the long-term operation of wind turbine. In this paper, the static mechanism of grouted connection is mainly studied from the aspects of axial compression and bending moment. Firstly, the axial compression mechanism of grouted connection with/without shear keys is described in detail, and then bending mechanism of the grouted connection is expounded. Finally, the static mechanism research of grouted connection is summarized.
2016, 3(S1): 68-72.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.015
Abstract:
Self-weight as well as wind and wave loading cause the axial load and bending moment in the part of grouted connection of offshore wind turbine foundation. Due to the time variation of the wind and wave, stochastic direction and size of the loa, the turbine and its foundation will withstand load effects as many as 109 cycles in the service period of 20 years or 25 years. Therefore, fatigue problem is severe. In this paper, the fatigue performance evaluation of steel structure, grouting material and integral structure is described, and then the fatigue mechanism of the connection with/without shear keys is studied. Finally, fatigue mechanism of grouted connection is summarized.
Self-weight as well as wind and wave loading cause the axial load and bending moment in the part of grouted connection of offshore wind turbine foundation. Due to the time variation of the wind and wave, stochastic direction and size of the loa, the turbine and its foundation will withstand load effects as many as 109 cycles in the service period of 20 years or 25 years. Therefore, fatigue problem is severe. In this paper, the fatigue performance evaluation of steel structure, grouting material and integral structure is described, and then the fatigue mechanism of the connection with/without shear keys is studied. Finally, fatigue mechanism of grouted connection is summarized.
2016, 3(S1): 73-76,81.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.016
Abstract:
In this paper, the typical failure causes of the type V52-850 fan produced by VESTAS in the southern mountain wind farm are analyzed, At the same time, the method and the improvement measures are put forward. The operation maintenance and fault treatment of the wind farm in the installation of the V52-850 type fan and similar models are of certain reference significance.
In this paper, the typical failure causes of the type V52-850 fan produced by VESTAS in the southern mountain wind farm are analyzed, At the same time, the method and the improvement measures are put forward. The operation maintenance and fault treatment of the wind farm in the installation of the V52-850 type fan and similar models are of certain reference significance.
2016, 3(S1): 77-81.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.017
Abstract:
During July and September each year, typhoon and rain often happen in Pearl River Estuary at Guangdong Province, where the typhoon from Western Pacific and South China Sea often lands. According to the geographical location and natural condition of Guangdong Province, this paper describes the typhoon distribution in this area, design of turbine's anti typhoon strategy and prevention measurements needed to consider during design of wind farm. From view of design, it also introduces some typhoon prevention measurements for new offshore wind farm. It provides a reference for the construction of offshore wind farm where typhoon often happens.
During July and September each year, typhoon and rain often happen in Pearl River Estuary at Guangdong Province, where the typhoon from Western Pacific and South China Sea often lands. According to the geographical location and natural condition of Guangdong Province, this paper describes the typhoon distribution in this area, design of turbine's anti typhoon strategy and prevention measurements needed to consider during design of wind farm. From view of design, it also introduces some typhoon prevention measurements for new offshore wind farm. It provides a reference for the construction of offshore wind farm where typhoon often happens.
2016, 3(S1): 82-87.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.018
Abstract:
This paper is based on the background of towers collapsing accidents of overhead transmission lines during "CaiHong" typhoon. The criterion on design reviewing of existing towers is discussed, and the wind load acting on the damage towers of the 220 kV overhead transmission line from typhoon attacking is calculated, as well as the reason for the tower collapsing was analyzed. Finally, some conclusions and suggestions are proposed to enhance design standards and tower strength on the coastal zones where typhoons landing always recur.
This paper is based on the background of towers collapsing accidents of overhead transmission lines during "CaiHong" typhoon. The criterion on design reviewing of existing towers is discussed, and the wind load acting on the damage towers of the 220 kV overhead transmission line from typhoon attacking is calculated, as well as the reason for the tower collapsing was analyzed. Finally, some conclusions and suggestions are proposed to enhance design standards and tower strength on the coastal zones where typhoons landing always recur.
2016, 3(S1): 88-92.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.019
Abstract:
The intelligent power distribution terminal is the intelligent devices that distributed in the intelligent power distribution network, which can achieve the date acquisition of power grid, fault detection, fault location and diagnosis, fault isolation and help the healthy area to restore power as well as accomplish the information exchange with advanced distribution automation system, it is an important part of intelligent power distribution network. This paper analyze the technology situation of intelligent power distribution terminal and aims to go further the technical personnel' research point, besides, this paper also discussed its market potential, providing a reference basis for the enterprises in the investment of intelligent power distribution terminanl.
The intelligent power distribution terminal is the intelligent devices that distributed in the intelligent power distribution network, which can achieve the date acquisition of power grid, fault detection, fault location and diagnosis, fault isolation and help the healthy area to restore power as well as accomplish the information exchange with advanced distribution automation system, it is an important part of intelligent power distribution network. This paper analyze the technology situation of intelligent power distribution terminal and aims to go further the technical personnel' research point, besides, this paper also discussed its market potential, providing a reference basis for the enterprises in the investment of intelligent power distribution terminanl.
2016, 3(S1): 93-98.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.020
Abstract:
The frequency of voltage drop, power grid harmonics, and voltage instability and so on in AC power distribution network is gradually increasing. The domestic and foreign research scholars now turn to the new field of DC power distribution network. Compared with AC power distribution network, DC power distribution network has the advantages of low cost, low transmission loss, high power supply capacity, high reliability, environmental protection, high power quality, easier for distributed power and energy storage to access and other characteristics. In this paper, the topology, advantages and characteristics, key technology of DC distribution network are described, and the development of intelligent DC power distribution network in China is summarized and prospected.
The frequency of voltage drop, power grid harmonics, and voltage instability and so on in AC power distribution network is gradually increasing. The domestic and foreign research scholars now turn to the new field of DC power distribution network. Compared with AC power distribution network, DC power distribution network has the advantages of low cost, low transmission loss, high power supply capacity, high reliability, environmental protection, high power quality, easier for distributed power and energy storage to access and other characteristics. In this paper, the topology, advantages and characteristics, key technology of DC distribution network are described, and the development of intelligent DC power distribution network in China is summarized and prospected.
2016, 3(S1): 99-102.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.021
Abstract:
LCC-HVDC transmission system has numbers applications in world. But the inherent technical characteristics of LCC-HVDC transmission system may cause some problems, such as the failure of commutation of converter station, unable to supply power to weak AC system. Hybrid DC transmission technology has the advantages of both two kinds of HVDC technology. It has the high flexibility control method and low cost, and has a good prospect in the energy convergence of renewable energy, asynchronous grid interconnection and long-distance transmission. In this paper, the DC field wiring scheme of the VSC-HVDC converter in hybrid HVDC system is proposed and optimized according to its characteristics. The performance of the system is improved and the investment cost is saved. And it has wide application prospect. for the reconstruction of LCC-HVDC converter station to VSC-HVDC converter station.
LCC-HVDC transmission system has numbers applications in world. But the inherent technical characteristics of LCC-HVDC transmission system may cause some problems, such as the failure of commutation of converter station, unable to supply power to weak AC system. Hybrid DC transmission technology has the advantages of both two kinds of HVDC technology. It has the high flexibility control method and low cost, and has a good prospect in the energy convergence of renewable energy, asynchronous grid interconnection and long-distance transmission. In this paper, the DC field wiring scheme of the VSC-HVDC converter in hybrid HVDC system is proposed and optimized according to its characteristics. The performance of the system is improved and the investment cost is saved. And it has wide application prospect. for the reconstruction of LCC-HVDC converter station to VSC-HVDC converter station.
2016, 3(S1): 103-106.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.022
Abstract:
The operation mode fast switching and change need to monitor AC tie line status in voltage source converter high-voltage direct-current (VSC-HVDC) power transmission system during the AC/DC parallel operation mode, In order to solve the problem of getting electric parameters by station control system. This paper proposes a scheme applying operational and monitoring device to get electric parameters, This paper analyses the discrimination strategy of operational and monitoring device and gives implementation plan to project, this paper can provide reference to project design.
The operation mode fast switching and change need to monitor AC tie line status in voltage source converter high-voltage direct-current (VSC-HVDC) power transmission system during the AC/DC parallel operation mode, In order to solve the problem of getting electric parameters by station control system. This paper proposes a scheme applying operational and monitoring device to get electric parameters, This paper analyses the discrimination strategy of operational and monitoring device and gives implementation plan to project, this paper can provide reference to project design.
2016, 3(S1): 107-111.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.023
Abstract:
The analysis on the total electric field under the HVAC-HVDC ajacent-tower hybrid transmission lines plays an important role in evaluating the electromagnetic environment nearby. However, few existing research considers the mutual effect of HVAC-HVDC hybrid transmission lines. This paper which considers the mutual effect calculates the total electric field. By comparing the results generated by the calculation with those in published literature, we consider the program reliable. This paper analyzes the influence of sub-conductor radius, sub-conductor splitting number, weather condition and space arrangement of lines. The results show that the total electric field can be effectively reduced by increasing the radius, increasing the splitting number, using the space arrangement with the positive polar closing to AC line. A significant increase in the total electric field on rainy condition should be given special attention.
The analysis on the total electric field under the HVAC-HVDC ajacent-tower hybrid transmission lines plays an important role in evaluating the electromagnetic environment nearby. However, few existing research considers the mutual effect of HVAC-HVDC hybrid transmission lines. This paper which considers the mutual effect calculates the total electric field. By comparing the results generated by the calculation with those in published literature, we consider the program reliable. This paper analyzes the influence of sub-conductor radius, sub-conductor splitting number, weather condition and space arrangement of lines. The results show that the total electric field can be effectively reduced by increasing the radius, increasing the splitting number, using the space arrangement with the positive polar closing to AC line. A significant increase in the total electric field on rainy condition should be given special attention.
2016, 3(S1): 112-115.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.024
Abstract:
With the western development drive and West-East power transmission project, HVDC technology in China has been rapid development. This article briefly describes several technical schemes of converter station secondary electrical design, including pole line CT installation location, pole line PT installation location, converter transformer valve side bushing PT, electrode line monitoring system. It reflects particularity of converter station secondary electrical design.
With the western development drive and West-East power transmission project, HVDC technology in China has been rapid development. This article briefly describes several technical schemes of converter station secondary electrical design, including pole line CT installation location, pole line PT installation location, converter transformer valve side bushing PT, electrode line monitoring system. It reflects particularity of converter station secondary electrical design.
Research on the Application of the Pin Definition of Prefabricated Optical Cable in Smart Substation
2016, 3(S1): 116-121.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.025
Abstract:
Modular construction technology of secondary system in intelligent substations refers to the use of modular technology to achieve standardized designing and factory processing, assembly-type construction, to enhance the overall efficiency and quality of construction. Prefabricated optical cables between equipments, cabins, and prefabricated cabin or chamber using standard sequence of pins are an important part of the modular construction technology. Summarizing the experience of modularized intelligent substation construction in recent 3 years, this standard focuses on the number and pins definition of prefabricated optical cables between intelligent cabinets and prefabricated cabin or secondary equipment rooms in Smart Substation, in order to achieve the standardization of prefabricated cable used in intelligent substation project.
Modular construction technology of secondary system in intelligent substations refers to the use of modular technology to achieve standardized designing and factory processing, assembly-type construction, to enhance the overall efficiency and quality of construction. Prefabricated optical cables between equipments, cabins, and prefabricated cabin or chamber using standard sequence of pins are an important part of the modular construction technology. Summarizing the experience of modularized intelligent substation construction in recent 3 years, this standard focuses on the number and pins definition of prefabricated optical cables between intelligent cabinets and prefabricated cabin or secondary equipment rooms in Smart Substation, in order to achieve the standardization of prefabricated cable used in intelligent substation project.
2016, 3(S1): 122-125.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.026
Abstract:
In this paper, according to the China Southern Power Grid Spatial Information Service (GIS) platform construction,Combined with electronic map and grid resources data quality status of each sub province company,Proposed suits the data of current technology of spatial data quality control system. And for each one of the key links in the technology system are carried out technical realization, Through the area proved to be scientific and economic benefits of the technology system. Further the technology system of landing long-term control mechanism for quality control, Provide technical support for spatial data for long-term stable operation of the GIS platform.
In this paper, according to the China Southern Power Grid Spatial Information Service (GIS) platform construction,Combined with electronic map and grid resources data quality status of each sub province company,Proposed suits the data of current technology of spatial data quality control system. And for each one of the key links in the technology system are carried out technical realization, Through the area proved to be scientific and economic benefits of the technology system. Further the technology system of landing long-term control mechanism for quality control, Provide technical support for spatial data for long-term stable operation of the GIS platform.
2016, 3(S1): 126-129.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.027
Abstract:
The design and implementation of a material management system for power grid enterprises, based on an initiative distribution mechanism has been the prime focus on our group. As the extant system cannot automatically remind the warehouse managers when shortage occurs, we firstly re-code the materials by merging the same kinds of materials which have different codes. Then, we design initiative distribution processes for first-level warehouses, second-level warehouses and emergency deposits respectively. According to the proposed processes, we design an initiative distribution management system with four functions which are material combination, material application, inventory management and allocating auxiliary. The application of the designed system demonstrates that it can improve inventory turnover rate, reduce the loss resulting from stockout, and release warehouse keepers' labor.
The design and implementation of a material management system for power grid enterprises, based on an initiative distribution mechanism has been the prime focus on our group. As the extant system cannot automatically remind the warehouse managers when shortage occurs, we firstly re-code the materials by merging the same kinds of materials which have different codes. Then, we design initiative distribution processes for first-level warehouses, second-level warehouses and emergency deposits respectively. According to the proposed processes, we design an initiative distribution management system with four functions which are material combination, material application, inventory management and allocating auxiliary. The application of the designed system demonstrates that it can improve inventory turnover rate, reduce the loss resulting from stockout, and release warehouse keepers' labor.
2016, 3(S1): 130-134.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.028
Abstract:
GIS geospatial data as the cornerstone of grid spatial information service platform,Its quality has a direct impact on the daily operations of the power grid spatial information service platform. This paper takes the construction of GIS platform in southern Power Grid Corp as the guiding principle in the construction of "sharing and cooperation service". This paper takes the construction of GIS platform in southern Power Grid Corp as the guiding principle in the construction of "sharing and cooperation service".
GIS geospatial data as the cornerstone of grid spatial information service platform,Its quality has a direct impact on the daily operations of the power grid spatial information service platform. This paper takes the construction of GIS platform in southern Power Grid Corp as the guiding principle in the construction of "sharing and cooperation service". This paper takes the construction of GIS platform in southern Power Grid Corp as the guiding principle in the construction of "sharing and cooperation service".
2016, 3(S1): 135-138.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.029
Abstract:
With the development of UAV technique, it has become a common trend to use it for transmission line inspection. However, the problems of current operation of UAV inspection still exist in relying on manual work for UAV operation, the collected image dates cannot be fully explored, extensive management of dates, etc. According the above problems, combined with a practical project of ultra high voltage transmission line, respectively improve the UAV data gathering methods under different inspection operation modes, and apply GIS system for the scientific management and application of UAV inspection dates. Practice has proved that the improving method can offer a more smarter, efficient way for UHV transmission line inspection, and provide a more forceful support for UAV inspection dates' application, management and decision-making.
With the development of UAV technique, it has become a common trend to use it for transmission line inspection. However, the problems of current operation of UAV inspection still exist in relying on manual work for UAV operation, the collected image dates cannot be fully explored, extensive management of dates, etc. According the above problems, combined with a practical project of ultra high voltage transmission line, respectively improve the UAV data gathering methods under different inspection operation modes, and apply GIS system for the scientific management and application of UAV inspection dates. Practice has proved that the improving method can offer a more smarter, efficient way for UHV transmission line inspection, and provide a more forceful support for UAV inspection dates' application, management and decision-making.
2016, 3(S1): 139-142.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.030
Abstract:
Guohua Taishan Power plant is a famous power plant, especially in the southern China. A lot of power investors will visit Taishan power plant in the preparation phase. Taishan power plant has received many awards in the construction industry and design industry. Taishan Power Plant achieved these awards because of superior unit performance and scientific operation management, but a good design is the premise, this article will introduce the excellent design of Taishan Power Plant in the plant general layout. The good general layout of the power plant is very important, it can be made to pave the way for saving investment, fast construction, low operation cost, fast convergence effect, as well as the long-term development of the site. The plant general layout of Taishan Power Plant is rational and forward-looking, it is worth reference for other large coastal thermal power plant.
Guohua Taishan Power plant is a famous power plant, especially in the southern China. A lot of power investors will visit Taishan power plant in the preparation phase. Taishan power plant has received many awards in the construction industry and design industry. Taishan Power Plant achieved these awards because of superior unit performance and scientific operation management, but a good design is the premise, this article will introduce the excellent design of Taishan Power Plant in the plant general layout. The good general layout of the power plant is very important, it can be made to pave the way for saving investment, fast construction, low operation cost, fast convergence effect, as well as the long-term development of the site. The plant general layout of Taishan Power Plant is rational and forward-looking, it is worth reference for other large coastal thermal power plant.
2016, 3(S1): 143-147,138.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.031
Abstract:
This paper puts forward a new type of anchorage, which uses steel bar and steel plate as anchorage element. Based on the main parameters of anchorage type, length, depth, number and spacing of anchorage element and concrete strength, we design a test to analyze the relationship between the ultimate bearing capacity and test parameters, the failure patterns and mechanism, and provide calculation formulas of ultimate bearing capacity of different types of anchorage.
This paper puts forward a new type of anchorage, which uses steel bar and steel plate as anchorage element. Based on the main parameters of anchorage type, length, depth, number and spacing of anchorage element and concrete strength, we design a test to analyze the relationship between the ultimate bearing capacity and test parameters, the failure patterns and mechanism, and provide calculation formulas of ultimate bearing capacity of different types of anchorage.
2016, 3(S1): 148-150.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.032
Abstract:
The research and application on tilting column top surface and tower leg base plate developed by Guangdong Electric Power Design Institute is to reduce the foundation cost of transmission lines and resolve construction, operation and maintenance problems. The results were initiated first in domestic transmission line industry. According to structure innovation and theoretical breakthrough, it has solved the engineering problems breakthrough, and obtained power engineering design proprietary technology in 2007.
The research and application on tilting column top surface and tower leg base plate developed by Guangdong Electric Power Design Institute is to reduce the foundation cost of transmission lines and resolve construction, operation and maintenance problems. The results were initiated first in domestic transmission line industry. According to structure innovation and theoretical breakthrough, it has solved the engineering problems breakthrough, and obtained power engineering design proprietary technology in 2007.
2016, 3(S1): 151-153,157.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.033
Abstract:
The paper set forth developments of present situation and tendency in the offshore wind farm. The survey and investigation on marine hydrometeorology and meteorological Information, geology and soil data are quite different between land and offshore, due to the conditions are difference. The paper expounds certain maners in survey and investigation and five points of proposal are put forward.
The paper set forth developments of present situation and tendency in the offshore wind farm. The survey and investigation on marine hydrometeorology and meteorological Information, geology and soil data are quite different between land and offshore, due to the conditions are difference. The paper expounds certain maners in survey and investigation and five points of proposal are put forward.
2016, 3(S1): 154-157.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.034
Abstract:
The purpose of this paper is to increase the efficiency of Mountain Torrent Disaster,and to enrich the investigation results by oblique photogrammetry. The combined tilted-cameras which was developmented independently was used in this investigation to obtain images. Then, aerotriangulation and data were made by professional software automatically. Real 3-D mode,ture orthophoto and digital elevation model were generated in the meanwhile. The results shown that the efficiency of Mountain Torrent Disaster is increased and the investigation results are enriched Thus,the application of oblique photogrammetry in Mountain Torrent Disaster is reliable and effective.
The purpose of this paper is to increase the efficiency of Mountain Torrent Disaster,and to enrich the investigation results by oblique photogrammetry. The combined tilted-cameras which was developmented independently was used in this investigation to obtain images. Then, aerotriangulation and data were made by professional software automatically. Real 3-D mode,ture orthophoto and digital elevation model were generated in the meanwhile. The results shown that the efficiency of Mountain Torrent Disaster is increased and the investigation results are enriched Thus,the application of oblique photogrammetry in Mountain Torrent Disaster is reliable and effective.
2016, 3(S1): 158-160,172.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.035
Abstract:
When deal with the coastal silt foundation, according to the geologic and actual condition of the project, dynamic consolidation method on rubble foundation is qualified as practical. After dynamic compaction,the result of roadbed load test, drilled core test and settlement observation showed that the bearing capacity and settlement control of the roadbed can meet the design requirements. The result of the treatment is good. For dynamic dompaction is simple in equipment usage, convenient in construction and economical, it can be widely used in coastal silt riprapped foundation treatment.
When deal with the coastal silt foundation, according to the geologic and actual condition of the project, dynamic consolidation method on rubble foundation is qualified as practical. After dynamic compaction,the result of roadbed load test, drilled core test and settlement observation showed that the bearing capacity and settlement control of the roadbed can meet the design requirements. The result of the treatment is good. For dynamic dompaction is simple in equipment usage, convenient in construction and economical, it can be widely used in coastal silt riprapped foundation treatment.
2016, 3(S1): 161-164.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.036
Abstract:
As our country promote construction industry transformation and upgrading, the belt and road initiative has been put forward. Engineering company focuses on informatization to promote business management innovating and to enhance core competitiveness. In this investigation we begin with the meaning of informatization and bussiness management, then analyse the relationship with each other, and discuss the informatization stage. The results shown that engineering company's information include four phases:information introducing, standaudizing, transmission and innovating. Through the four phases, we use information technology to promote business management innovation, which can reform business objective development and lead the engineering company to form a new profit growth point.
As our country promote construction industry transformation and upgrading, the belt and road initiative has been put forward. Engineering company focuses on informatization to promote business management innovating and to enhance core competitiveness. In this investigation we begin with the meaning of informatization and bussiness management, then analyse the relationship with each other, and discuss the informatization stage. The results shown that engineering company's information include four phases:information introducing, standaudizing, transmission and innovating. Through the four phases, we use information technology to promote business management innovation, which can reform business objective development and lead the engineering company to form a new profit growth point.
2016, 3(S1): 165-167,185.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.037
Abstract:
EPC projects focus optimization management. This paper addresses procurement and design cost control in project management, identify the critical points and risk points in this perspective and analyzes them. This paper describes the critical points and risk points in the process of design optimization management, and analyzes the essential points from the perspectives of contract management and risk management. Meanwhile, this paper emphasizes the importance of taxation planning in controlling the procurement cost. The role and initiative of the design team are critical to design optimization. An optimization group is set up to address the issues related to the benefits of concerned parties in the process of project execution. The contract is the embodiment of contract spirit, as well as the most effective means of binding on concerned parties of the project. Design management and procurement management are the focuses of project execution, as well as the hardest part of the project execution. To plan well is the prerequisite of all the later tasks.
EPC projects focus optimization management. This paper addresses procurement and design cost control in project management, identify the critical points and risk points in this perspective and analyzes them. This paper describes the critical points and risk points in the process of design optimization management, and analyzes the essential points from the perspectives of contract management and risk management. Meanwhile, this paper emphasizes the importance of taxation planning in controlling the procurement cost. The role and initiative of the design team are critical to design optimization. An optimization group is set up to address the issues related to the benefits of concerned parties in the process of project execution. The contract is the embodiment of contract spirit, as well as the most effective means of binding on concerned parties of the project. Design management and procurement management are the focuses of project execution, as well as the hardest part of the project execution. To plan well is the prerequisite of all the later tasks.
2016, 3(S1): 168-172.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.038
Abstract:
Along with Chinese government "one belt one road" policy going on, traditional Chinese design institutes will enter the oversea market to realize the strategic target of international engineering enterprise. During this process,the ability and methods of its project management shall be adjusted to satisfy the requirements of the overall contracting market for its further development. Hereby the author make the discussion regarding to quality management of the international EPC overall contracting based on the specification of PMI and his own oversea project executing experience.
Along with Chinese government "one belt one road" policy going on, traditional Chinese design institutes will enter the oversea market to realize the strategic target of international engineering enterprise. During this process,the ability and methods of its project management shall be adjusted to satisfy the requirements of the overall contracting market for its further development. Hereby the author make the discussion regarding to quality management of the international EPC overall contracting based on the specification of PMI and his own oversea project executing experience.
2016, 3(S1): 173-176.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.039
Abstract:
Procurement cost control in EPC projects has been the prime focus of our project teams. In this investigation, we analyzed the factors which had affected procurement cost in the thermal power projects by using the ABC analysis, and reviewed the practice effect of the lean management method in the Jiangxi Datang International Fuzhou power plant EPC project. The results point out the key equipment and materials which we should pay more attention to, and emphasize the important of reducing cost through the promotion of procurement management. Finally, it summarizes out three major means of procurement cost control in EPC projects. This work provides some guidance for procurement cost control in EPC projects.
Procurement cost control in EPC projects has been the prime focus of our project teams. In this investigation, we analyzed the factors which had affected procurement cost in the thermal power projects by using the ABC analysis, and reviewed the practice effect of the lean management method in the Jiangxi Datang International Fuzhou power plant EPC project. The results point out the key equipment and materials which we should pay more attention to, and emphasize the important of reducing cost through the promotion of procurement management. Finally, it summarizes out three major means of procurement cost control in EPC projects. This work provides some guidance for procurement cost control in EPC projects.
2016, 3(S1): 177-179.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.040
Abstract:
Regarding to the management in oversea thermal power plant EPC project, based on the requirement of management, this letter analyze the interface with other department or unit and their information input or requirement firstly; then describe the function in the process of procurement management, finally elaborate the key point for coding system in the information construction.
Regarding to the management in oversea thermal power plant EPC project, based on the requirement of management, this letter analyze the interface with other department or unit and their information input or requirement firstly; then describe the function in the process of procurement management, finally elaborate the key point for coding system in the information construction.
2016, 3(S1): 180-185.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.041
Abstract:
With the fierce competition of the power, more and more power companies start to expand the international market, while many companies has got great economic loss because of inexperience or making little of risk. With the risk analysis of the preliminary stage of project, engineering, procurement, construction and handing over, it proposes the corresponding counter measures,which can give a good reference to those expanding international market companies.
With the fierce competition of the power, more and more power companies start to expand the international market, while many companies has got great economic loss because of inexperience or making little of risk. With the risk analysis of the preliminary stage of project, engineering, procurement, construction and handing over, it proposes the corresponding counter measures,which can give a good reference to those expanding international market companies.
2016, 3(S1): 186-189.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.042
Abstract:
In order to study the influence of grid controllation, safety operetion and distribution grid maintenance while the distributed solar generation accessing to the power grid, based on the princeple and framework, and also by field research and theoretical calculation, this paper analyzes the risk of anti-delivery of current and the influence to short-circuit current, relay protection, automation, system stability, and then discusses the usage of some related standards and institutions. Finally, this paper gives some measures to fasten the safety controllation, it proposes to examine the equipment carefully and force the security measures strictly. All the suggestions will promote the safety of operation and maintenance, while the distributed solar generation developing vigorously.
In order to study the influence of grid controllation, safety operetion and distribution grid maintenance while the distributed solar generation accessing to the power grid, based on the princeple and framework, and also by field research and theoretical calculation, this paper analyzes the risk of anti-delivery of current and the influence to short-circuit current, relay protection, automation, system stability, and then discusses the usage of some related standards and institutions. Finally, this paper gives some measures to fasten the safety controllation, it proposes to examine the equipment carefully and force the security measures strictly. All the suggestions will promote the safety of operation and maintenance, while the distributed solar generation developing vigorously.
2016, 3(S1): 190-193.
doi: 10.16516/j.gedi.issn2095-8676.2016.S1.043
Abstract:
With the economic and social development, offshore wind power has become an important direction of renewable energy development. Compared with onshore wind farm, the difficulty and economic cost of offshore wind farm construction will be significantly increased, which become one of the constraints of its rapid development. In this paper, a typical offshore wind farm construction was studied. By using risk management process, risks of the main projects including offshore wind turbine foundation construction, turbine installation, submarine cable laying, offshore substation construction was identified, analyzed and treated. The corresponding treatments provide good reference for the similar offshore wind farm construction and installation.
With the economic and social development, offshore wind power has become an important direction of renewable energy development. Compared with onshore wind farm, the difficulty and economic cost of offshore wind farm construction will be significantly increased, which become one of the constraints of its rapid development. In this paper, a typical offshore wind farm construction was studied. By using risk management process, risks of the main projects including offshore wind turbine foundation construction, turbine installation, submarine cable laying, offshore substation construction was identified, analyzed and treated. The corresponding treatments provide good reference for the similar offshore wind farm construction and installation.
