摘要
高压断路器灭弧室的真空度劣化会对断路器电气性能和使用寿命产生影响。提出了一种基于电容耦合法的高压断路器真空度在线监测装置的设计方案。通过耦合电容的方法获取断路器分合闸时的拉弧信号,利用FPGA采集该电压信号,并对其进行傅里叶变换,从而分析信号的频域特性,最终获得拉弧信号的频谱图。实验结果表明,该装置能够实时获取断路器分合闸时拉弧信号的频谱信息,从而判断其灭弧室的真空度优劣。该方案对保障高压断路器的稳定运行和延长其使用寿命具有重要意义。
The deterioration of vacuum degree in the arc extinguishing chamber of high-voltage circuit breakers will have an impact on the electrical performance and service life of the circuit breaker.Therefore,a design scheme for an online monitoring device for vacuum degree of high-voltage circuit breakers based on capacitance coupling method is pro-posed.By coupling capacitors,the arcing signal of the circuit breaker during opening and closing is obtained.The voltage signal is collected using FPGA,and Fourier transform is performed on it to analyze the frequency domain characteristics of the signal.Finally,the frequency spectrum of the arcing signal is obtained.The experimental results show that the device can obtain real-time spectral information of the arc pulling signal when the circuit breaker opens and closes,thereby judging the vacuum degree of its arc extinguishing chamber.This solution is of great significance to ensure the stable operation of high-voltage circuit breakers and extend their service life.
作者
陆旭锋
王霄峰
左昊忱
LU Xufeng;WANG Xiaofeng;ZUO Haochen(State Grid Shanghai Jiading Electric Power Supply Company,Shanghai 201800,China;College of Artificial Intelligence and Automation,Hohai University,Changzhou 213000,China)
出处
《仪表技术》
2024年第4期82-86,共5页
Instrumentation Technology
基金
国网上海嘉定供电公司2023年度群众性创新科技项目(520931230003)。
关键词
电容耦合法
断路器
真空度
在线监测
capacitance coupling method
circuit breaker
vacuum level
online monitoring
