Research on Transient Characteristics of CVT and Corresponding Impacts on Microchip Relay Protection

YAO Jian-guang; ZOU Yi-yun; FENG Wei; WANG Suo-kou

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Research on Transient Characteristics of CVT and Corresponding Impacts on Microchip Relay Protection

更新时间：2025-05-17

- Research on Transient Characteristics of CVT and Corresponding Impacts on Microchip Relay Protection
- High VoltageApparatus Vol. 45, Issue 4, Pages: 34-36(2009)
- 作者机构：
  
  江苏省泰州市供电公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM451
- Published：2009
- 稿件说明：
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[1]姚建光,邹逸云,冯伟,王锁扣.电容式电压互感器的暂态特性及其对微机继电保护装置影响的研究[J].高压电器,2009,45(04):34-36.

YAO Jian-guang, ZOU Yi-yun, FENG Wei, et al. Research on Transient Characteristics of CVT and Corresponding Impacts on Microchip Relay Protection[J]. High voltageapparatus, 2009, 45(4): 34-36.
[1]姚建光,邹逸云,冯伟,王锁扣.电容式电压互感器的暂态特性及其对微机继电保护装置影响的研究[J].高压电器,2009,45(04):34-36. DOI：

YAO Jian-guang, ZOU Yi-yun, FENG Wei, et al. Research on Transient Characteristics of CVT and Corresponding Impacts on Microchip Relay Protection[J]. High voltageapparatus, 2009, 45(4): 34-36. DOI：

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。

Abstract

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.

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