内蒙古电力技术2023，Vol.41Issue(6)：75-83,9.DOI:10.19929/j.cnki.nmgdljs.2023.0088
抑制直流输电换相失败方法研究
Research of Methods for Suppressing Commutation Failure in HVDC Transmission
摘要
Abstract
By analyzing the mechanism of phase change failure,it is analyzed that the main reason for phase change failure is that the current converter element thyristor used in high-voltage DC transmission based on the grid phase change converter is a semi-controlled device.When the turn-off angle is less than its inherent limit turn-off angle,commutation failure will occur,which will cause the converter transformer DC magnetic bias,converter valve overheating,overvoltage of the power grid at the sending end and the generator set offline and other problems.In serious cases,it may further lead to DC blocking,which may lead to the risk of large-scale power outage.The existing measures to suppress commutation failure are sorted out and summarized,and these measures are classified and described,one is to modify the controller setting,the other is to suppress commutation failure by adding additional components or equipment,the third is to carry out local transformation of converter topology,and finally points out the problems to be studied urgently,and puts forward feasible technical ideas for current and future research.关键词
高压直流输电/换相失败/晶闸管/抑制措施Key words
HVDC/commutation failure/thyristor/suppression measures分类
信息技术与安全科学引用本文复制引用
贺日星,杨宝峰,陈瀚栋,罗振鹏..抑制直流输电换相失败方法研究[J].内蒙古电力技术,2023,41(6):75-83,9.基金项目
内蒙古自治区高等学校科学研究项目"消除换相失败的电流源型换流器原理与关键技术研究"(NJZZ22366) （NJZZ22366）
内蒙古工业大学科学研究项目"抑制LCC换相失败的电流源型换流器原理与关键技术研究"(ZZ202122) （ZZ202122）
