摘要
针对某220kV线路发生的一起特殊跨线故障,利用等效电流和序分量法,求解线路故障时的电气量,分析故障时线路保护的动作行为。分析结果与录波数据和动作报告完全吻合,表明在跨线故障时传统的线路保护存在误选相和保护拒动的可能性。根据不同原理保护在跨线故障时的行为,提出同杆并架线路的保护配置方案。
According to a special cross-country fault occurs on certain 220 kV transmission lines,this paper calculates the fault components of current and voltage and analyzes the performance of line protection based on the method of equivalent current and sequence component.The analysis results agree with the protection operation reports and recorded data,which shows that the conventional protection may select the fault phase wrongly and may refuse to operate when the cross-country fault occurs.According to the performance of protections with different principles,this paper presents the configuration scheme for the parallel lines on the same pole.
出处
《电力系统自动化》
EI
CSCD
北大核心
2008年第15期104-107,共4页
Automation of Electric Power Systems
关键词
线路保护
跨线故障
等效电流
动作行为
保护配置
line protection
cross-country fault
equivalent current
operation performance
configuration scheme
