电网技术2011，Vol.35Issue(5)：216-222,7.
天广直流系统中性母线过电压机制研究
Study on Neutral-Bus Overvoltage Mechanism of +500 kV DC Power Transmission Project From Tianshengqiao to Guangdong
摘要
Abstract
Based on post-innovation control and protection strategies for +500 kV DC power transmission project from Tianshengqiao to Guangdong, the overvoltages of neutral-bus under various fault conditions are researched and the overvoltage processes under different fault conditions are divided into several stages for the detailed analysis, and the overvoltage mechanism as well as the current direction during various stages are expounded. Research results show that the energy flowing through neutral-bus attester due to the grounding faults respectively occurred at outgoing line of valve side of converter transformer and that occurred at outgoing line of rectifier bridge cannot be controlled by the control and protection system, so the neutral-bus arrester has to exist enough adequate energy capability; the energy flowing through neutral-bus arrester due to the break fault occurred in DC system can be reduced while the time-delay of protection action is shortened.关键词
天广直流工程/PSCAD/EMTDC/过电压机制/中性母线避雷器/紧急停运/闭锁Key words
+500 kV DC power transmission project/PSCAD/EMTDC/ overvoltage mechanism/ neutral-bus attester/emergency switch off sequence (ESOF)/ blocking分类
信息技术与安全科学引用本文复制引用
袁士超,王东举,陈锡磊,黄志岭,卢宇,田杰,陈文翰,孙可,周浩..天广直流系统中性母线过电压机制研究[J].电网技术,2011,35(5):216-222,7.基金项目
国家重点基础研究发展计划项目(973项目)(2011CB209405). （973项目）
