Study On Distribution Network Reconfiguration Considering The Impacts Of Distributed Generation

During the development process of distribution system, lower loss and higherefficiency has been the pursuit of power utility. As an important means of optimaloperation and control of distribution system, network reconfiguration has beenfavored by experts and scholars. In recent years, distributed generation(DG)technology has been considerable development with the worsening of the energycrisis and environmental problems. While distributed generations connected to powersystem, great changes have taken place in the structure, operation and control mode ofdistribution system. Those reasons make it significant to study on the optimaloperation and network reconfiguration of distribution system connecting DG.According to the recent research and literature, this paper mainly studies on the distributionnetwork reconfiguration after the distributed generations connected. The main contents areas follows:(1)Study on the impact of DG on the distribution network reconfiguration. Basedon the characteristics of the DG, it is divided into two categories that can be scheduled ornot.(2) Analysis the impact of the output, access location, access capacity and powerfactor of DG that can not be scheduled on the distribution network reconfiguration. Itwill provide a theoretical basis for the optimal connecting plan of the DG.(3) As a control variable, the injection of the DG that can be scheduled is used tooptimize distribution system operation with the network reconfiguration. The optimaloperation mode is found and makes the network to minimize losses under thecombined effect of network reconfiguration and optimization injection of DG.(4) Validate these methods using IEEE-33testing system. As we expected，testresults approve the effectiveness of the methods proposed in this paper.