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RSS2015 Vol. 2, No. 1
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2015, 2(1): 1-10.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.001
Abstract:
Energy consumption is the main source of carbon dioxide from human activity, and carbon mitigation has become an important constraint on the energy development in China. The total CO2 emission of the World in 2012 from energy consumption is up to 3.173 4×1010 t of CO2. The total CO2 emission from energy consumption in China occupies 26.0% of the World total. The per capita emission for the World in 2012 is 4 510 kg CO2, and it is 6 093 kg CO2 for China. The per capita emission for Guangdong province in 2012 is 5 224 kg CO2, which is higher than that for the world but lower than that for China. With the progress of the effort for energy conservation and emissions reduction as well as combating climate change, the per unit production energy consumption level in Guangdong Province is becoming lower year by year, and the energy mix is also improving, which suppressed the growth tendacy of the CO2 emission from fossil fuel consumption in the province. The total emission in 2012 is a little less than that in 2011. It is predicted according to the present trend situation, the total carbon emission from energy consumption in Guangdong province will reach 1.606 2×108 t carbon equivalent in 2020, about 9.69×106 t of carbon equivalent more than that in 2012. And the per capita emission will reach 5 287 kg, a little higher than the 5 224 kg in 2012. If the development of the third industry is accelerated during the thirteenth five-year period, the total consumption of fossil fuel in 2020 will be 2.7% less than that in 2012, and the total CO2 emission will be 3.5% less than that in 2012. The per capita CO2 emission will be lowered from 5 224 kg in 2012 to 4 795 kg in 2020, which will be approching the average level of the world then.
2015, 2(1): 11-16.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.002
Abstract:
Distributed Generation(DG) gradually infiltrates into the power grid with the advantages of environmental protection, high efficiency and agility, but also brings certain impact on the development planning of power transmission network and distribution network.This paper discusses the impact of DG integrating into the South China Power Grid in the construction planning of power transmission network, power supply reliability of distribution network, relay protection and so on. The research results provide important references and suggestions for the rapid development of DG in China Southern China Power Grid.
2015, 2(1): 17-21.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.003
Abstract:
Smart grid has become one of the main development trends of power grid all over the world. However, smart control depends on waste area and high frequency monitor. The huge size of the monitor data has exceeded traditional database's ability because it can only handle limited data size with the centralized and serialized data process method. Big data technologies using distributed parallelized approaches overcome the above shortcuts, and make a big success in many practical areas. In this paper, we focus on the challenges in smart grid data process, and discuss the methods how to adapt the technologies for smart grid. Our target is to establish an information platform for smart grid construction in near future.
2015, 2(1): 22-25.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.004
Abstract:
Private network is an important part of the distribution network. With the development of economy, more and more private users connect to the distribution network. To coordinate public network with private network , This paper presents the evaluation index system for the coordinated development between public network and private network, Then the percentage of private line occupancy, percentage of private line capacity below standard, load factor ratio of public line and private line are used to characterize the coordination of public network and private network. According to the current situation of a southern city in China, this paper carries out a detailed analysis of the problems, proposes methods and measures to improve the coordination between public network and private network which has high reference value for the plan, construction and assessment of urban network..
2015, 2(1): 26-31.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.005
Abstract:
To meet the social demand, energy planning should be designed from the aspect of energy consumption, which energy embodied in goods can be measured. With consumption-based energy planning, embodied energy consumptions and energy flows among provinces in China can be revealed to avoided unnecessary pressures for these provinces. In this paper, Interregional input-output table of China is built, and embodied energy intensities can be calculated. Beijing, Shanxi and Guangdong are chosen as cases of three kinds of typical provincial regions which include the type of resource dependency, resource supply and market interaction, respectively.
2015, 2(1): 32-36,41.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.006
Abstract:
With China's increasing demand for energy high-efficiency utilization, power investors, especially power producers with energy resources advantage have to face the challenge of green intelligent energy base. In this context, taking advantage of the information technology for energy base unified planning, unified construction, unified management service has become such an challenging issue that must be considered when the project is on the list awaiting for government green light. This paper from the perspective of the requirements, follows project construction of full life cycle, proposes building a digital dynamic energy base integrated platform, covering all stage of all data of project planning, design, construction, operations, and combineing three dimensional model, and geographic space information, and big data technology, and cloud technology, advanced of technology means. As a result, the integrat ed platform showcaseg a digital dynamic and operatable real scene of energy base.
2015, 2(1): 37-41.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.007
Abstract:
The evolution of low-carbon technology innovation and its interactive with regional policy, economic development is an urgent problem to be solved. For this reason, this article incorporates government, universities, enterprises, market, regional policy and economic environment into one system, and constructs the super-cycle model of low-carbon technology innovation. By analyzing the catalytic cycle of knowledge transfer as the core and super-cycle, this paper reveals the interactive development mechanism between main body of low-carbon technology innovation and regional economy, and expands the functional areas of innovation system. In addition, for local governments and enterprises to develop low-carbon development path in line with regional policy and economic characteristics, it provides a paradigm for reference which takes the China-UK CCUS center as the example.
2015, 2(1): 42-45,50.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.008
Abstract:
This paper firstly introduces the basic situation for the gasification technologies used in coal fired IGCC power plants that have been in operation and the running experiences gained by various types of gasifier. Then the paper continues to show the general information of gasifiers that would be adopted by several coal fired IGCC plants which are still under construction or being planned. The work of this present paper could be a beneficial reference for the determination of coal gasification methods in future IGCC power plants projects.
2015, 2(1): 46-50.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.009
Abstract:
To provide reference experiences and optimization methods for steam cycle performance of F advanced class combined cycle, impacts of high pressure main steam pressure drop are investigated by GTpro software. The calculation results show that the loss of power output becomes smaller caused by pressure drop when steam turbine inlet steam pressure grows higher. By the analysis of main steam flow measuring methods, flow meter along main steam piping could be cancelled, which makes steam turbine higher efficiency and produces more profits. The research and analysis could provide a optimized design method of main steam system for other gas-steam combined cycle projects.
2015, 2(1): 51-54,61.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.010
Abstract:
Based on the flow Accelerated Corrosion on the Secondary loop Piping of Nuclear Power Plant, this Paper Discussed About the Mechanism, Introduce the in Service Inspection Development in Different Country and also in China. To deal with FAC, this Paper Discussed the ways that can be Applied in the Design Process and Present the Available Scheme to Minimize it During the in Service Inspection, Whcih can be a Reference for such kind of Nuclear Power Plant.
2015, 2(1): 55-61.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.011
Abstract:
The current different main building arrangements of 350 MW power plants are introduced, then the design, optimization principle of main building arrangement are analyzed and given optimizing suggestion. Modular design is used to optimize, compare and select to get the best assemble scheme for turbine hall module and boiler house module to reduce the cubage of main power building, weigh of the four main steam pipes, construction period and investment. The research shows: there has obvious advantage in building cubage and investment by combining the side bunker bay arrangement scheme for main building arrangements of 350 MW power plants. Finally, the Huaneng Jingmen (2×350 MW) cogeneration project is taken as an example which adopts the side bunker bay arrangement scheme.
2015, 2(1): 62-65.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.012
Abstract:
This paper designs the feasible scheme of heat-supply reformation for 2×135 MW units by means of analyzing and comparing the current technology of heat-supply reformation. In consideration of the peak loader regulating of power system, the safety of turbine and boiler, the installation time and the unit operation, the power plant uses pressure matcher to inject and mix the main steam, hot-reheat steam and extraction steam for supplying heat, the heat-supply ability of each unit will reach 150 t/h finally. The annual standard coal consumption rate for power supplying in plant will be reduced from 353.4 g/kW·h to 333.1 g/kW·h and the benefit of energy-saving will be remarkable.
2015, 2(1): 66-70.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.013
Abstract:
With the peak valley difference of Guangdong power system increasing, system peak regulation problem is becoming prominent, and it puts up new request on cogeneration units involved in peak regulation. This paper discusses the selection of gas-fired cogeneration units and peak regulation capability, analyzes electricity prices mechanism, and puts forward suggestions to promote the development of guangdong gas-fired cogeneration science.
2015, 2(1): 71-76.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.014
Abstract:
The power quality of PV generation is greatly affected by the maximum power point tracking (MPPT) algorithm. Researching an improvement measure of MPPT algorithm, is an effective way to reduce the power quality problems caused by the PV generation system and improve the micro grid power quality. The drawbacks of a commonly used variable step perturbation algorithm and its effects on the power quality of micro-grid are analyzed. According with the drawbacks, an improved variable step perturbation algorithm is proposed combining with the mathematical model of PV cells. And the simulation analysis show that through improving the MPPT algorithm can effectively improve the power quality of micro-grid which contains PV generation system.
2015, 2(1): 77-80.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.015
Abstract:
LTE-based random access process becomes the bottleneck for tremendous increase of distribution/metering terminals in smart grid, since the access delay and block probability may degrade the real-time effective data collections. This paper introduces the main process of random access in LTE, then the limitation in smart grid is analyzed. The simulation platform for random access is established to evaluate the performance with the key indicators, such as block probability, access delay, the average number of preamble retransmissions. Finally, the principle for parameter configuration is proposed.
2015, 2(1): 81-87.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.016
Abstract:
Deepwater floating systems are mainly composed of floating hull, mooring system and riser system. The design analysis of floating platform and mooring/riser is very important for normal operation and running safely. For the design of floating platform, the hydrodynamic analysis is usually performed in frequency domain, and then the hydrodynamic loads are transferred to the finite element model to execute structural FE analysis. The design of the platform can be performed by combining the hydrodynamic analysis results and finite element analysis results with national standards. In addition, effective coupled analysis of the floating system in time domain must be executed due to the nonlinearity and dynamic properties. The results of global response can be used for the initial design of platform and mooring/riser system, and also can be used in the detailed design with the results as the dynamic boundary conditions of mooring/riser. According to these two design ideas, this paper gives a brief introduction of analysis flow, special problems and solution methods, and then introduce the steps of analysis of platform and mooring/riser by combining application of software.
2015, 2(1): 88-91.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.017
Abstract:
The dynamic responses of a transmission tower with angle section members under lateral wind loadings are actively investigated in this study. A real large scale transmission tower is taken as an example to establish the dynamic analytical model by using three dimensional beam elements. The wind loadings in the lateral direction, which are acted on the transmission tower, are simulated to investigate the structural dynamic responses. The observations indicate that the dynamic responses in both the lateral and longitudinal directions are observed if the tower is subjected to lateral wind loadings. The peak wind induced responses in the lateral direction are much larger than those in the longitudinal direction. In addition, the peak stresses of some major members are larger than the yielding strength of the steel material. Therefore, the effects of the lateral wind loadings should be taken into consideration in the design and construction of the transmission tower.
2015, 2(1): 92-97,114.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.018
Abstract:
The typical sandstone on dam foundation of Xiangjiaba hydropower station are taken samples. The creep characteristics of the sandstone are studied by triaxial compression tests. The damage characteristics of instability phase, axial strain, lateral strain and volume strain of the whole process of creep curve are analyzed, then the long-term strength of sandstone is evaluated. The results show that there is a starting stress threshold of sandstone under creepage, each creep curve has a instantaneous strain under each load which the instantaneous strain will decrease with the increase of confining stress and deviatoric stress, the axial instantaneous strain has well linear relation with the deviatoric stress. There are obvious three phases for lateral strain and volume strain, and the lateral strain and volume strain have higher growth rate than the axial strain while the creep curves are similar to each other. The lateral creep strain is higher than the axial and volume creep strain under the same confining stress or deviatoric stress. The long-term strength of sandstone can be determined by the partial stress-strain curve clusters which the volume partial stress-strain curve cluster is the best. Finally, the burgers model is most suitable model to simulate the creep characteristic of sandstone amond the current rheological constitutive models
2015, 2(1): 98-103.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.019
Abstract:
For the better compilation of new nuclear standard of technical code for geological drilling core preservation of nuclear power plants in 2013, the investigation plan is detailly drawn up for drilling cores library of nuclear power plants construction companies and marine investigation institutes in Guangzhou, Shenzhen, Lianyungang, Rongcheng and Dalian in China. The current situation and problems of core preservation are analyzed, and the important materials and contents for preliminarily building the framework of the standard are studied. The research shows that geological core preservation should be divided into at least three phases for nuclear power engineering. Permanent-preservation cores should be typical rock or soil specimens of nuclear safety-related building (structure) foundations.
2015, 2(1): 104-109.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.020
Abstract:
Pumped-storage power station project construction has the characteristics of long construction period and large investment, and it is reflected in the project cost management performance for periodic, dynamic and systemic characteristics, which making the project cost management considerablely difficult and effecting the healthy development of the power plant construction. This paper introduces that Hongping pumped-storage power station project management applies a new management mode which is similar to agent CM mode, then studies the measures of cost management for construction management department during the project implementation stage. Project cost management method is put forward from the organization, effective bidding design and construction drawing design, bidding, construction stage and information management, and the use of active control, dynamic control method and the combination of technology and economy of the whole process management of engineering cost are to maximize the owner of investment benefit.
2015, 2(1): 110-114.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.021
Abstract:
Grid line inspection field operation has characteristics of mobility and large-scale operation, which is difficult to be supervised in time and accurately and there are lack of effective collection standards and evaluation support tools for statistics of task workload, task execution situation, task execution, and operation time. This paper fully considers line inspection job characteristics and evaluation difficulty, then designs and implements a field operation evaluation system of line inspection based on location based service(LBS) technology. The results show that the evaluation system could effectively solve the existing problems of mobile workers in job evaluation and performance appraisal, then improve work efficiency of grid line inspection field operation and reduce human resources costs.
2015, 2(1): 115-119.
doi: 10.16516/j.gedi.issn2095-8676.2015.01.022
Abstract:
At present, Circuit breaker has been used as the main switch of reactive-load compensation equipment in 500 kV substation. The circuit breaker of the reactive power compensation circuit always has a short life expectancy and needs frequently replaced dued to the switching test of circuit breaker designed for connection with the short-circuit current. A specified load break switch is introduced to switch the high-capacity reactive power compensation. The load break switch is a mature technology and suitable for the actual condition with the frequent operation of reactive power circuit, so it can extremely extends the electrical life of the switches. According to the characteristic analysis of specified load break switches, BPA software is used to emulate the application feasibility of the load break switches in the 500 kV substation.
