Advanced Materials Research Vols. 986-987

Abstract: In order to determine the required live working safety distance for 750kV double circuit transmission line in different altitude areas of China, by using the test data of 750kV double circuit transmission line in the low altitude areas, and combining the common altitude correction methods, the live working safety distances of different altitude correction methods are obtained. By comparing and analyzing the results of different analysis methods, the required minimum approach distances and minimum combined gap distances of live working are recommended under different working conditions in the altitude of 1000m ~ 5000m areas. The results could provide technical reference for 750kV double circuit transmission line in different altitude areas.

Abstract: This paper regarded CNP1000 power plant system as the research object, which is the second-generation half Nuclear Reactor System in our country, and tried to set Westinghouse AP1000 passive residual heat removal system to the primary circuit of CNP1000. Then set up a simulation model based on RELAP5/MOD3.2 program to calculate and analyze the response and operating characteristic of passive residual heat removal system on assumption that Station Blackout occurs. The calculation has the following conclusions: natural circulation was quickly established after accident, which removes core residual heat effectively and keep the core safe. The residual heat can be quickly removed, and during this process the actual temperature was lower than saturation temperature in reactor core.

Abstract: For the simulation of wind turbine, the wind speed is extremely important parameters and indicators to measure the output power of the unit is the wind load. Therefore, in the airflow dynamics and simulation of wind loads before establishing an accurate wind speed model is crucial. At present, the application for wind turbines COMSOL fan, fan blades and wind load simulation field, the extremely important wind speed model is not perfect, most of the research is confined to a single constant wind speed, wind speed virtually ignored the magnitude and direction of change, on changes over time and space at the same time is one of the few studies of wind, so find a way to accurately describe the range of wind speeds, and can be combined well with COMSOL method can greatly improve the aerodynamic performance of wind turbines the overall level of .

Abstract: The rapid growth of power grid load put forward higher requirements on the transmission capacity of line, with the growing tension of line corridors, building new transmission lines is becoming more and more difficult. Therefore, it is of realistic significance to analyze the transmission capacity of existing transmission line and fully tap the existing power grid transmission capacity. On the basis of previous studies, and consulting a large number of references, this paper summarizes and expounds the methods of improving transmission capacity by using the thermal rating analysis, introducing static thermal rating and real-time static thermal rating. Also, this paper verifies applications of the above methods in actual running environment.

Abstract: Among all the factors influencing the capacity of wind power, peak regulation capability is commonly regarded as one of the most important constraint factors. From the perspective of peak regulation, the maximum peak-load regulating adequacy revised by the wind power characteristic coefficient is the limitation of the capacity of wind power. This paper proposes an assessment system on capacity of wind power integration into grid based on power balance. First of all, this assessment system takes the impact of wind power integration on the reserve capacity of the power system into consideration. Then calculate the reserve capacity based on power generation reliability index. Finally, evaluate the capacity of wind power based on the peak regulation capability of the units during the low load period. This paper analyses the capacity of wind power integration into Liaoning power grid based on power supply characteristics, load characteristics and peak-valley difference, and points out that the phenomenon of the “wind curtailment” is unavoidable. According to the specific situation of wind power limitation, this paper proposes measures to maximize the capacity of wind power.

Abstract: In this paper, case of hotel in Shanghai was studied, and three kinds of CCHP import solutions are discussed by this algorithm based on real working condition parameters of thermoelectric load. Then, put forward the relative conclusions based on comparison of each scheme and calculation of power supply benefits and heating benefits, from the point of power supply economics and heating economics. So it has certain realistic meaning for the application of CCHP system in city hotel buildings.

Abstract: Sustainable economic growth of a country needs support from energy industry. The limitation and environmental problems caused by energy makes the governments to re-examine their energy strategies. As an important tool for national macro-control, tax policy has an irreplaceable role on the promotion of conventional energy conservation, sustainable use and introduction of new energy sources. More and more theories and practices have proved that the energy tax is beneficial to conservation and utilization of energy. At present, China has yet to levy a special energy tax. There are many problems in energy taxes, so we have to reform our current energy taxes. Evaluation of the effect of the reforms can be judged in many ways. In this article, we will analyze it from a social welfare perspective, trying to build an optimization of the energy tax system in order to achieve social welfare maximization.

Abstract: Building integrated photovoltaic (BIPV) is an important direction of the green building. BIPV has developed rapidly in many developed countries and effectively saved resources. It owes to the government's effective promotion policy. The implementation of the on-grid tariff policy is a new stage of BIPV development. BIPV on-grid tariff pricing is a key point of BIPV promotion. Whether on-grid tariff is reasonable and applicable or not will directly affect the implementation effect of BIPV on-grid tariff policy. The current international common standard cost method is used to calculate on-grid tariff. Many countries implement unified on-grid tariff standard in their country, and often ignores the differences between different projects and areas. Based on the average on-grid tariff with standard cost method ,combined with the influence factors of BIPV on-grid tariff this paper build a corresponding on-grid tariff adjustment coefficient system with the current study method. Three methods used to get this goal are given and analyzed in this paper, the Delphi method, fuzzy mathematics method and neural network. This paper uses the Delphi method to build the on-grid tariff adjustment coefficient system model and choose three main factors, annual effective utilization hours, combination mode and PV system capacity, to build the on-gird tariff coefficient adjustment system model. This paper provides a reference basis of BIPV promotion policies and on-grid tariff pricing model for many countries.

Abstract: This paper introduce the necessity of the construction of offshore wind power projects, analysis of the impact on the marine transport of offshore wind power project after completion, and then use the fuzzy comprehensive evaluation method to carry out a comprehensive assessment of offshore wind power projects, by identifying risk assessment index system, establish model for risk assessment, the final task is use the model to evaluate the navigation safety of an offshore wind power project.

Abstract: Electricity market reform has brought new challenges to transmission grid planning, the traditional only considers a future scenarios of transmission grid planning, this method can’t meet the actual needs. In this paper, the uncertainty factors of market environment is analyzed, based on the relaxation factor and the way of wiring ,the transmission grid planning model is established. The security not only takes the N-1 breaking cases into account, but also includes the same tower Multiple-loop breaking at the same time. The model is solved using the methods based on Monte Carlo simulation and hierarchical genetic algorithm, ultimately the resulting meets reliability requirements and minimum total cost of transmission planning programmes under the future uncertainty environment. To build the simulation model, simulating the different methods of wiring way impacts on the investment and risk of the grid planning.