Research On Power Flow Calculation Of Distribution Network

Flow power calculation is basis for security analysis and calculation of power system. It can improve accuracy and rapidity of power system automation operation and real-time analysis systematically. The information of changing of distribution network power flow is absolutely necessary .Therefore, distribution network power flow calculation is trend.In this paper, in the basis of various power flow calculation methods, considering the accuracy and convergency, the three phase power flow calculation method bases of circuit calculation and back forward sweep is presented. The components of distribution network model is build. The different nodes conduction matrixes is build for different transformer wiring methods.The methods are presented for different source point in few loop network. Single source few loop network power flow calculation is implemented bases on superposition principle. It decomposes the network to radial network and loop network to calculate. The plused result is the result of few loop network power flow calculation result. Multi-sources network power flow calculation is implemented bases on equivalent source method. It equals the source node as a point. Then it can be treated according to the voltage amplitude and phase. And the node voltage can be calculated by back forward sweep method.The software is compiled by Matlab based on mathematic model and calculation method. The data test is accuracy and fulfill the convergence demands. To convenient user, the software operation interface is compiled by VC++.