摘要
电容式电压互感器(CVT)中包含有电容、电感等储能元件,其二次输出电压不能立即响应一次电压的变化。影响CVT暂态过程的因素众多,笔者重点分析了短路相角对其暂态过程的影响。运用MATLAB中的电气系统模块库PSB建立了CVT电磁暂态过程的仿真模型。仿真结果表明不同的短路相角对CVT的暂态过程影响有很大的差别,并给出了在不同短路角情况下其暂态响应的变化规律。同时针对不同的保护算法,分析了暂态过程对其算法准确度的影响,提出了相应的解决办法。
Capacitor voltage transformer consists of many capacitors and inductors, its secondary voltage output can not response immediately to the primary voltage changes. There exist many factors that influence the process of transient response of CVT. This paper lays emphasis on the impact of short circuit voltage phase on the transient process of CVT. Power system block （PSB） in MATLAB Simulink is adopted to establish a simulation model for analyzing electromagnetic transient process. The simulation analysis indicates that different short circuit voltage phase value exerts greatly varied influence on transient process of CVT. A group of transient response curves versus short circuit voltage phase is provided. Electromagnetic transient influence on precision of different relay protection algorithms is analyzed, and solutions to the influence are suggested.
出处
《高压电器》
CAS
CSCD
北大核心
2009年第4期34-36,共3页
High Voltage Apparatus
关键词
电容式电压互感器
暂态特性
继电保护装置
短路相角
capacitor voltage transformer（CVT）
transient response characteristic
relay protection
short circuit phase
