Development On Reactive Power Optimization Soft Of 10kV Distribution Network In Beibei System

The problem of topological analysis, load flow and reactive power optimal of distribution network is deeply researched in this paper for the need of study on load flow and reactive optimal of distribution network. Combining the power system basic theory and modern optimal theory and successfully applying C++Builder, MATLAB and Access Database, a set of load flow and reactive power optimal software is developed. The content including:(1) According to the radial structure and multilayer characteristic of distribution network, a novel layer-by-layer backward/forward sweep method id developed. The branch power/voltage loss of the same layer can be parallel computed without relabeling buses and branches, that greatly increases the speed of load flow calculation.(2) The query function find of MATLAB is flexibly applied in general topological analysis and sharply reduce the code and complexity of program. The advanced evolution algorithm presented in this paper extend the topological function to querying loop network and querying connection line, which make a foundation for data check-up and data correction of radial analysis software.(3) Reactive power optimal of radial network is a very complex nonlinear discrete optimal problem. To ensure the speediness, feasibility and optimality, evolution algorithm is improved by combination with interior point sequence linear optimal algorithm and principle of var balance. The improved algorithm is applied to the reactive power optimization and achieves distinct effect.(4) Based on the C++ Builder, MATLAB and Access Database, a software for topological analysis, sensitivity analysis, load flow analysis and reactive power optimal compute of distribution network is independently developed. The software has convenient text input/output interface, flexible data query, data correction function and batch data guide-in, copy of multi-project and multi-work function. All this make the software to be a very practical advanced software for power system.(5) Test on the BeiBei distribution network proves that the algorithm is effective and the software is reliable.