一起特殊跨线引起故障线路保护动作的分析  

Analysis on Line Protection Operation Caused by a Special Cross-country Fault

作　　者：陈水耀[1] 裘愉涛[1] 方愉冬[1] 

机构地区：[1]浙江电力调度通信中心,浙江省杭州市310007

出　　处：《电力系统自动化》2008年第15期104-107,共4页Automation of Electric Power Systems

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.

关 键 词：线路保护 跨线故障 等效电流 动作行为 保护配置 

分 类 号：TM773[电气工程—电力系统及自动化]