电力系统自动化2017，Vol.41Issue(14)：190-196,7.DOI:10.7500/AEPS20161118004
输电线路虚拟有功功率差动保护
Virtual Active Power Differential Protection for Transmission Lines
摘要
Abstract
The active power differential protection has unique advantages in dealing with distributed capacitance and high resistance faults.However,the defect of close metallic faults with small resistance limits its practical application.In order to overcome this shortcoming,a concept of virtual active power emanating from referring to the superposition principle is proposed,and the different characteristics for virtual active power under the internal fault and the external fault conditions are analyzed.On this basis,a split phase action criterion for virtual active power differential protection is proposed and its operation characteristics are analyzed qualitatively.By using the model of 500 kV transmission lines on PSCAD,a number of simulations have been conducted for different fault locations,fault types,transition resistances,reactive elements operations and asynchronous data to evaluate the influences on the protection scheme performance comprehensively.Theoretical analysis and simulation results show that the proposed protection scheme is able to correctly identify the fault sections without dead zone for close metallic faults but a great capability against fault resistance,less data exchanges,a low requirement for synchronization and no need of capacitance compensation.关键词
输电线路/故障分量/虚拟有功功率/有功差动保护Key words
transmission lines/fault components/virtual active power/active power differential protection引用本文复制引用
黄家凯,高厚磊,彭放,刘星..输电线路虚拟有功功率差动保护[J].电力系统自动化,2017,41(14):190-196,7.基金项目
国家重点研发计划资助项目(2016YFB0900600).本文研究得到许继集团有限公司科技研究项目(SGTYHT/14-JS-190)的资助,在此表示诚挚感谢.This work is supported by National Key Research and Development Program of China (No.2016YFB0900600). （2016YFB0900600）
