适用于配电网潮流计算的改进回路电流法  

An Improved Loop Current Analysis Suitable to Power Flow Calculation of Distribution Network

作　　者：祁晓枫[1] 王承民[1] 孙伟卿[1] 段建民[2] 金义雄[2] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市闵行区200240 [2]上海电力学院电力与自动化学院,上海市杨浦区200090

出　　处：《电网技术》2011年第6期60-64,共5页Power System Technology

基　　金：国家863高技术基金项目(2009AA05Z213);国家自然科学基金项目(50907039)~~

摘　　要：为使回路电流法适于配电网潮流分析,在π型等值电气元件的基础上,以阻抗支路为链支、接地支路为树支,忽略了线路对地导纳和变压器对地支路,建立了配电网回路电流分析模型。采用恒阻抗负荷模型替代恒功率负荷模型,将回路电流方程简化为线性方程组进行求解,给出了对退化节点的处理方法,分析了回路电流法和回路阻抗法的异同。算例结果验证了该方法的有效性。To make loop current analysis suitable to power flow analysis for distribution network,on the basis of π-equivalent electrical components a loop current analysis model for distribution network,in which impedance branch are taken as chain branches and the grounded branch as the tree branches and the earth admittances of transmission lines as well as earth branches of transformer are neglected,is built.Substituting constant power load models by constant impedance load model,the loop current equations are simplified as linear equations and solved,and the processing method for generated nodes is given.Besides,the similarities and differences between loop current analysis and loop impedance analysis are analyzed.Simulation results show that the proposed method is effective.

关 键 词：配电网 回路电流法 回路阻抗法 潮流计算 节点退化 

分 类 号：TM744[电气工程—电力系统及自动化]