基于补偿电压突变量的一种实用快速故障选相判据  

A practical rapid fault phase selection criterion with compensation voltage component

作　　者：余浩[1] 

机构地区：[1]广东电网公司电网规划研究中心,广东广州510080

出　　处：《电力科学与技术学报》2014年第1期59-64,共6页Journal of Electric Power Science And Technology

摘　　要：论述突变量选相应用于(超)高压电力系统的必要性,分析补偿电压突变量的优良特性,并指出现有基于补偿电压突变量的选相判据存在不足。在分析补偿电压突变量在不同故障情况下的特征基础上,基于"突变量元件"提出新的选相判据,该判据将突变量与接近于零的固定门槛值进行比较,解决了故障初期因突变相量未完全形成而造成选相不准确的问题。RTDS仿真结果表明补偿电压突变量选相可以在故障发生后快速、准确的选出故障相。This paper discussed the necessity of superimposed component based fault phase selec-tion for high voltage power systems,analyzed the excellent characteristics of compensation volt-age superimposed component,and proposed the deficiency of the fault phase selection criterion with the compensation voltage superimposed component.Based on analyzing different characteris-tics of compensation voltage superimposed component under different fault types,a new fault phase selection criterion with＆quot;Volume Element Fault Component＆quot;was proposed.The superim-posed component in the new criterion was only compared with threshold which is close to zero,It solved the problem that the superimposed component can＆#39;t be recorded during the fault initial stage which may lead to select fault phase inaccurately.RTDS results show that the proposed method can select faulted phase rapidly and accurately.

关 键 词：电力系统 故障选相 补偿电压突变量 突变量选相 

分 类 号：TM773[电气工程—电力系统及自动化]