Distributed Power Distribution Network In Locating And Sizing Study

With the rapid development of distributed power generation technology, traditional power system with distributed power has become a main trend of the development. If the distributed power grid technology get reasonable use, it can not only reduce pollution, but also reduce the network loss, and cooperate with reactive power compensation technology, it can effectively improve the network voltage distribution, increase the stability of the power system.Meanwhile, distributed power change the grid power supply form of single-ended, even make power flow reversing, influence normal operation of power system. And due to the access of distributed power supply, the relay protection also needs to set a new operation value.Because of the existence of these problems, the location and capacity optimization of distributed power is particularly important. To solve these problems, this paper first introduces different types of distributed power generation’s principle, make equivalent processing of the distributed power node types after access to distribution network, generally transformed into PQ node types and regard it as negative load for calculation. And making a appropriate plan for accessing to distribution network, choosing reasonable access scheme, at the same time, the forward-backWard sweep method can’t solve the problem of ring network, this paper put forward opening the distribution network ring in power separating point, equivalent to the form of a radial distribution network, and doing research of the distribution network after simulation, the results are convergence.Aiming at the problem of distributed power’s location and capacity. Regarding the distribution network’s minimum loss as target function, the power grid voltage fluctuations as penalty function, constructing the fitness function of the distributed power supply access, and using genetic algorithm to optimize33nodes distribution network contain two weak ring for simulation analysis, the simulation results show that in this paper, the distributed power distribution network optimization method is feasible and effective.