The Analysis Of Large-scale Distributed Generation Access To Regional Power Grid

The combination of large power grid and distributed generation technology will be the trend of the future development of power system.It not only meets the needs of economic development,but also conforms to the strategy of sustainable development in China.Distributed power supply can reduce the user cost,improve the power quality of power supply,more flexible and improve the power supply reliability and sustainability,distributed power supply and traditional distribution network could complement each other and comprehensive utilization of clean energy and provide reliable power supply and voltage stability is the best choice for load.The development scale of distributed power supply has a great influence on the node voltage,line power flow and distribution network planning.And distributed power supply with different configurations on the distribution network and the degree of influence is different,the distributed power supply installation location and installation capacity must be carefully chosen,in order to bring the impact of distributed generation on regional power grid to a minimum.The access of the distributed power supply changes the original grid structure of the local electric network,and has great influence on the power flow of the local electric network.And the access of distributed generation has a substantial impact on the future planning of the regional power grid,and the network planning has to consider the factors of the distributed power supply.This paper first gives a detailed introduction to the distributed power supply,in-depth research on the different kinds of the distributed power generation characteristics and current developing situation.Then,it analyzes in detail the impact of the access of the distributed power supply on the original grid,especially the distribution of the node voltage and network loss in the distribution network.Effect of combined power in Shenyang region,for distributed access to regional power grid detailed simulation analysis,effects of different access location,different access capacity and different operating power factor of distributed power of regional power grid node voltage and the loss of the network,the simulation data will be explained.At last,the article puts forward a kind of based on the accurate calculation formula of network loss,and derived distributed power allocation method,through this method to calculate regional power grid with DG access the best location,access capacity and optimal operation of power factor.