单相自适应重合闸相位判据的研究  

STUDY ON PHASE CRITERION FOR SINGLE-POLE ADAPTIVE RECLOSURE

作　　者：李斌[1] 李永丽[1] 黄强[1] 翟永昌[1] 曾治安[2] 马志宇[1] 贺家李[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津市300072 [2]重庆市电力公司,重庆市400014

出　　处：《电力系统自动化》2003年第22期41-44,共4页Automation of Electric Power Systems

基　　金：重庆市重点科学资助项目 (70 93)~~

摘　　要：自适应自动重合闸技术具有诸多传统重合闸技术所不具有的优势。提出了一种新型区分输电线路单相瞬时性故障与永久性故障的方法。当瞬时性故障发生时 ,短路点电弧熄灭后 ,在恢复电压阶段 ,断开相电压的大小及其相位都与永久性故障情况有本质不同。在详细分析断开相电压工频分量组成部分的基础上 ,利用它们的相位特性 ,提出了单相自适应重合闸的相位判据 ,并针对输电线路的实际参数、运行方式以及故障条件对判据的影响做了详尽分析 ,结果表明 ,相位判据可以准确判定故障性质。该判据方法简单、可靠 ,而且仅利用单端电气量 ,易于实现。Adaptive single-pole auto-reclosure offers many advantages over the conventional approach. Based on extensive investigation, this paper presents a method of distinguishing the transient faults and permanent faults on transmission lines. When a transient fault occurs, after the extinction of the fault arc, the magnitude and phase of fault voltage is essentially different to those in the permanent fault case during the stage of voltage recovery. This paper analyzes the characteristics of inductance coupling voltage and capacitance coupling voltage. Based on the characteristics of fault voltage phase, a phase criterion is proposed to realize the single-pole adaptive reclosure. The effect of actual line parameter, operation and fault conditions are analyzed. It is concluded that the phase criterion can distinguish the fault characteristics correctly. Electromagnetic Transits Program (EMTP) simulation and actual recording data show that the phase criterion is correct and valid.

关 键 词：自动重合闸 瞬时性故障 永久性故障 恢复电压 相位判据 

分 类 号：TM76[电气工程—电力系统及自动化]