电流相位特征的配电网方向元件研究  

Research on the directional component using the current phase characteristics in distribution system

作　　者：饶楚 邵文权[1] 夏经德[1] 

机构地区：[1]西安工程大学电子信息学院,陕西西安710048

出　　处：《西安工程大学学报》2017年第6期781-787,共7页Journal of Xi’an Polytechnic University

基　　金：陕西省科技厅工业攻关项目(2016GY-101);西安工程大学博士启动基金资助项目(BS1018)

摘　　要：分布式电源(DG,distributed generation)接入后改变了传统配电网潮流特征,可能导致传统保护误动、拒动,所以快速识别其故障方向有利于保护正确动作.本文分析了含DG配电网发生相间故障时的电流特性,并针对含2条以上线路的配电网相间故障,利用配电网同一母线连接的非故障线路之间电流相位差接近0°,而非故障线路与故障线路之间电流相位差接近90°的特性,给出一种仅利用线路工频电流相位特征的方向元件判据.仿真计算结果表明,所给出的方向元件能有效判断配电网相间故障的故障方向,且仅利用电流量,具有较好适用性.The traditional distribution network of the tidal current characteristics is changed with the distributed generations.Conventional protection cannot ensure the correct action.Quick and accurate judgment of fault direction is helpful to the protection.Thus the phase to phase fault characteristic was analyzed.The current phase difference between two non-fault lines is close to zero degrees,but the current phase difference between non-fault line and fault line is close to ninety degrees on the same bus.This paper proposes a directional element using the current phase characteristics for two or more lines of the distribution network under phase to phase fault.Simulation results indicate that the directional element can judge the phase to phase fault direction effectively of the distribution network.The element using the current in-formation has a good applicability.

关 键 词：分布式电源 配电网 电流相位特征 方向元件 

分 类 号：TM727[电气工程—电力系统及自动化]