中国电机工程学报2023，Vol.43Issue(23)：9010-9019,10.DOI:10.13334/j.0258-8013.pcsee.221667
MMC与混合式直流断路器开关操作的瞬态电场实测及其在状态监测中的应用
Transient Electric Field Caused by the Operation of the MMC and HVDC CB and Its Application in the Condition Monitoring
孔旭 1李跃波 1刘黎 2樊淑娴3
作者信息
- 1. 军事科学院国防工程研究院工程防护研究所,河南省洛阳市 471023
- 2. 电力传输与功率变换控制教育部重点实验室(上海交通大学电气系),上海市 闵行区 200240
- 3. 山东科技大学电气与自动化工程学院,山东省 青岛市 266590
- 折叠
摘要
Abstract
The transient electric field(Efield)generated by the switching operation of the IGBT of the modular multilevel converter(MMC)and hybrid DC circuit breaker(CB)in the converter station is measured.Moreover,its application in the on-line condition monitoring of the equipment is analyzed.First,it is proved that the switching transient Efield in the converter station is a quasi-static field and it has a linear relationship with the equipment voltage.This provides the theoretical basis for the condition monitoring method based on the switching transient Efield.Furthermore,in the artificial short-circuit test of Zhouding converter station,the high-frequency Efield waveforms of the MMC and the switching transient Efield pulses of the DC CB are measured.The characteristics of the high-frequency Efield signal under different working conditions of MMC are analyzed.It is found that the high-frequency Efield signal contains the high-order harmonic information that is not easy to measure by the self-contained waveform recording system of the converter station.On the other hand,it is found that based on the steep pulse front of the switching Efield pulse,the blocking moment of MMC and DC CB can be measured with an error of less than 0.005ms.Therefore,the measurement method based on transient electric field can make up for the limited measurement bandwidth of the self-contained waveform recording system of the converter station to a certain extent.It can supplement the high-order harmonics and other operating information of the system and improve the measurement accuracy of the blocking moment of the MMC and CB.It has potential application value for online condition monitoring of the MMC,HVDC CB and other equipment.关键词
在线状态监测/瞬态电场环境/混合式高压直流断路器/高压直流输电/模块化多电平换流器Key words
on-line condition monitoring/transient electric environment/hybrid HVDC circuit breaker/HVDC transmission/modular multilevel converter(MMC)分类
信息技术与安全科学引用本文复制引用
孔旭,李跃波,刘黎,樊淑娴..MMC与混合式直流断路器开关操作的瞬态电场实测及其在状态监测中的应用[J].中国电机工程学报,2023,43(23):9010-9019,10.
