Research On The Power Loss Of 10kV Distribution Network Consists Of Distributed Generation

Nowadays,the global fossil resources are gradually reduced,the environmental pollution is more and more serious,but the electricity consumption of people in various countries is gradually increasing.At this time,the distributed generation because of green,efficient,convenient installation and other advantages have been vigorously developed.With the integration of a large number of distributed generation into the distribution network,it has an impact on the original distribution network.The main research work and conclusions of this paper are summarized as follows:(1)The advantages and disadvantages of the theoretical power loss algorithm are analyzed by studying the calculation methods of power loss and combining with the characteristics of the distribution network.The traditional power loss algorithm is no longer suitable for distribution network with distributed generation.Power flow algorithm and particle swarm optimization are the most commonly used methods for power loss calculation at present,but sometimes the results of power loss calculation will fall into the local optimal solution.In this paper,particle swarm optimization algorithm is optimized to make the power loss calculation iterate to the global optimal solution.(2)In order to analyze the power loss of 10 k V distribution network including distributed generation,the most common distributed generation in the distribution network is studied,including the characteristics of distributed power output,grid-connected model and node type in power loss calculation.By building a model of the distributed generation integrated into the distribution network,it is concluded that the impact of the grid connection of the distributed generation on the power loss depends on the access capacity and access location of the distributed generation.Then,by establishing the IEEE33 distribution network node system simulation model,the access capacity and access node position of the distributed generation are changed respectively,and the optimal access capacity and the optimal access position of the distributed generation grid connection can reduce the power loss,which has reference value for the planning and design of the distributed generation access distribution network.(3)Calculate the power loss of 10 k V distribution network containing photovoltaic power generation in Genhe city,using the improved particle swarm optimization algorithm based on daily load curve.By using the fuzzy C-means class principle,the power industry of the distribution network is classified and synthesized,and the equivalent daily load curves of each industry are obtained.After considering the influence of daily load curve changes of each node on power loss calculation,the particle swarm optimization algorithm is improved by changing the inertia weight coefficient from maximum to minimum.The comparison between the power flow algorithm and the algorithm used in this paper verifies that the algorithm used in this paper improves the accuracy and speed of the calculation.Based on the calculation results of power loss,this paper finds out the high loss area,analyzes the causes of high loss,and puts forward loss reduction measures to improve the economic benefits of distribution network.