摘要
换相失败是高压直流输电系统(HVDC)中逆变器典型的故障之一,本文以分析比较HVDC两类换相失败保护的特点为目的,在考虑基本控制系统、换相失败检测、直流故障检测和交流故障检测等环节的作用下,详细地分析了交流系统单相接地故障引起的换相失败故障下两类换相失败保护的动作情况。最后,对于换流器区内所有的故障,列出了两类换相失败保护的动作情况进行比较,结果表明:现有的两类换相失败保护均能够反应换流器的区内故障,并且对于不同的故障,两类保护的特点不同。实际中,应根据两类保护的特点选择合适的换相失败保护。
Commutation failure is one of the typical faults in inverter stations of HVDC transmission systems. In this pa- per, in order to analyze and compare the performance of two types of commutation failure protection, commutation failure due to single- phase fault of AC system is discussed in detail by considering of the regulator ~operating in the bas- ic control modes, the detection of commutation failure, DC faults and AC faults. In the end, the protection perform- ances under all fault cases in the converter are presented. The results showed that current two types of commutation failure protections can identify the faults in the converter, but the protection performances are different under differ- ent fault cases, which show that the two types of protection should be selected properly.
出处
《现代电力》
北大核心
2013年第3期44-48,共5页
Modern Electric Power
关键词
换相失败
HVDC
控制方式
保护动作
故障
commutation failure
HVDC
control system
protection performances
faults
