可变圆特性的故障分量距离继电器  

Fault Component Distance Relay With Changeable Circle Characteristics

作　　者：刘千宽[1] 柳焕章[2] 黄少锋[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,北京102206 [2]华中电力调度通信中心,武汉430077

出　　处：《电工技术学报》2007年第12期77-83,共7页Transactions of China Electrotechnical Society

摘　　要：通过对反应补偿电压变化量距离继电器边界动作特性的研究,提出了比幅式故障分量距离继电器的通用动作方程。为提高此类继电器的耐过渡电阻能力和避免因过渡电阻引起的同相问题的不正确动作,提出了一种可变圆特性的故障分量距离继电器及其具体实现方法。该继电器由三个动作方程分成两组动作判据构成。两组判据各采用不同的算法,一组判据通过采样值积分算法实现继电器的快速动作,另一组判据采用傅里叶算法实现保护的准确测量,两组判据相互补充,实现快速动作和提高耐过渡电阻能力的统一。并以750kV系统为模型进行了RTDS仿真实验。理论分析和仿真实验表明,该继电器安全可靠、快速,耐过渡电阻能力强。Based on the operating boundary of fault component distance relay, its general operating equation is presented in this paper. To improve its resistive tolerance, a novel type relay with changeable circular characteristics is put forward. And to prevent the relay from ＂in-phase＂ problem caused by high fault resistance, its blocking criterion in ＂in-phase＂ area is also proposed. The relay is comprised of three operation equations derived from the general operating equation. These equations are grouped under two criteria, where one is calculated by sampling integral arithmetic to achieve its fast operating while the other by Fourier arithmetic to enhance the protected range. Theoretical analysis and dynamic simulation test results show that the fault component distance relay with changeable circle characteristic is security with ultra-high speed and great capability against fault resistance.

关 键 词：距离继电器 故障分量 过渡电阻 线路保护 超高压线路 

分 类 号：TM588[电气工程—电器]