基于路径搜索和戴维南等值的合环电流计算

Closing Loop Current Calculations Based On The Path Searching And Thevenin’s Equivalent

对配电网合环问题进行了研究。针对辐射型配电网,本文提出了一种合环路径自动拓扑搜索的方法,利用戴维南等值求解合环等值阻抗,对合环稳态电流和冲击电流及其有效值进行了理论分析推导,在环路拓扑搜索的基础上,根据叠加原理求解环路上各支路的电流。基于linux系统采用c++和Java语言开发了合环操作风险分析软件,并对某配电网络的合环操作进行仿真计算,计算结果验证了本文计算方法的实用性和有效性。

The method of closing loop in distribution power network is studied. For the Radiation type distribution network, this paper presented a automatic topology search method of closed loop path, using thevenin's equivalent to solve closed loop equivalent impedance, besides, steady-state current and impulse current was analyzed. According to superposition principle, currents of all closed loop branches were solved based on loop path searching. Based on Linux system a closed loop operation risk analysis software is complied with C++ and Java language,a loop closing test of a distribution network shows the practicality and effectiveness of the proposed methods in the paper.