Research on Start Criterion of DC Circuit Breaker Based on Wavelet Transform

DENG Chaoping; WANG Yuhong; LIN Guodong; FENG Xuemin; SHI Jiyin; HU Wenwang; GONG Hong

doi:10.13296/j.1001-1609.hva.2016.10.024

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Research on Start Criterion of DC Circuit Breaker Based on Wavelet Transform

更新时间：2025-04-26

- Research on Start Criterion of DC Circuit Breaker Based on Wavelet Transform
- High VoltageApparatus Vol. 52, Issue 10, Pages: 142-147+152(2016)
- 作者机构：
  
  1. 国网福建省电力有限公司电力科学研究院
  2. 四川大学电气信息学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2016.10.024
  CLC： TM561
- Published：2016
- 稿件说明：
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[1]邓超平,王渝红,林国栋,冯学敏,石吉银,胡文旺,龚鸿.基于小波分解的直流断路器启动判据研究[J].高压电器,2016,52(10):142-147+152.

DENG Chaoping, WANG Yuhong, LIN Guodong, et al. Research on Start Criterion of DC Circuit Breaker Based on Wavelet Transform[J]. High voltageapparatus, 2016, 52(10): 142-147+152.
[1]邓超平,王渝红,林国栋,冯学敏,石吉银,胡文旺,龚鸿.基于小波分解的直流断路器启动判据研究[J].高压电器,2016,52(10):142-147+152. DOI： 10.13296/j.1001-1609.hva.2016.10.024.

DENG Chaoping, WANG Yuhong, LIN Guodong, et al. Research on Start Criterion of DC Circuit Breaker Based on Wavelet Transform[J]. High voltageapparatus, 2016, 52(10): 142-147+152. DOI： 10.13296/j.1001-1609.hva.2016.10.024.

摘要

直流断路器的启动判据直接影响断路器的动作性能。分析了直流系统故障行波的特点

提出一种基于小波分解的直流断路器启动判据。首先利用小波变换对直流系统故障时电压行波进行多尺度分解

通过比较分解后的高尺度的模极大值的变化情况

判断直流系统的故障

再利用电流行波模极大值的正负性区分直流系统的区内、区外故障

并与电压行波模极大值判据共同组成直流断路器的启动判据。最后利用MATLAB与PSCAD对启动判据进行了仿真验证

仿真结果表明

该启动判据原理简单

容易实现

并且具有较高的可靠性高与快速性。

Abstract

The performance of DC circuit breaker is directly affected by the criterion of DC circuit breaker. The characteristics of fault traveling wave of DC system are analyzed and a start criterion of DC circuit breaker based on wavelet transform is proposed in this paper. Firstly

the voltage traveling wave of the system fault is decomposed through wavelet transform under different scales. By comparing the modulus maxima under high scales

the fault of DC system is distinguished. This paper utilizes the polarity of the modulus maxima of current traveling wave to determine the external fault or the internal fault and integrates those two criterions to form the start criterion of the DC circuit breaker. Finally

simulations are performed by MATLAB and PSCAD

and the simulation results show that the start criterion is simple

easy to implement

and has a high reliability and rapidity.

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