高电压技术2011，Vol.37Issue(4)：888-896,9.
±800kV特高压直流线路故障选极的极波面积比值法
Polarity Wave Area Ratio Method of ±800 kV UHVDC Transmission Line Fault Line Selection
摘要
Abstract
For the DC system with bipolar operation, when a pole line fault occurs, the non-fault line is coupled to large change rates of voltage and current, by which the start criterion is easy to operate, so it is necessary for power system to select the fault pole. When fault occurs on DC line, the polarity wave of fault line is far from the zero axis, and the polarity wave of non-fault line changes in the vicinity of the zero axis,so the absolute value of integral a-long the zero axis of the polarity wave on fault line is higher than that on non-fault line. According to these characteristics, we propose a new method of UHVDC transmission line fault selection based on the ratio of polarity wave area of positive line and negative line. A large number of digital simulation results show that this method is of strong anti-interference ability and robustness to high resistance fault.关键词
故障选极/特高压直流输电线路/行波保护/极波/积分绝对值/极波波形面积比值Key words
fault line selection/ UHVDC transmission line/ traveling wave protection/ polarity wave/ absolute value of integral/ ratio of polarity wave area分类
信息技术与安全科学引用本文复制引用
束洪春,朱盛强,田鑫萃,杨毅..±800kV特高压直流线路故障选极的极波面积比值法[J].高电压技术,2011,37(4):888-896,9.基金项目
国家自然科学基金(50977039 （）
50847043 （）
90610024 （）
50467002 （）
50347026) （）
云南省自然科学基金(2005F0005Z). （2005F0005Z）
