Study Of Wuqing Gas Distributed Energy Station Access System

Distributed power generation technology(DGT) usually refers to a small,highly efficient and reliable form of electricity generation which near the users. The distributed energy station develops to be an efficient form of energy supply when the distributed generation technology is combined with the traditional energy technology. Gas distributed energy station improve above 70% energy efficiency to the energy cascade utilization. Gas distributed energy station has 40 years of history in Europe, the United States and other western countries, which is still in its infancy in our country. But its bright future has shown.The access system of the gas distributed energy station is researched in this paper. It is the channel which the electric power being sent out and the starting power of the gas distributed station being sent into. The main research contents are as follows:(1) The necessity of the gas distributed energy station construction for Tianjin power grid and Wuqing district is proved based on Beijing, Tianjin and Hebei north power grid, Tianjin power grid structure and future capacity planning, as well as heating load demand of Wuqing district.(2) Three scheme of access system are presented based on the requirements of power system, directed against the structure of the region and the installed capacity of Wuqing gas distributed energy station. The specific parameters are determined while the transmission line selection, short circuit current and project cost of each scheme is achieved by analysis and calculation. The power flow and power system stability of each scheme is calculated, which verify that the solution meets safety requirements.(3)The three schemes are compared with each other. They are analyzed through the analytic hierarchy progress(AHP) being introduced and the corresponding hierarchy model being set up. Then the judgment matrix ranking is constructed, and the comparison result is proved to be scientific and reasonable by the consistency level being verified.Finally a comprehensive analysis of the plan is conducted in this paper, which completely meets the requirement of the present stage engineering construction, as well as the demand of the future distributed energy station expansion. The feasibility of the scheme and certain reference significance to other engineering research and design of access system is shown in the end.