用于串联补偿线路的纵联距离保护改进方案  

Improvement of Longitudinal Distance Protection for Series Compensated Line

作　　者：赵安国[1] 刘巍 彭和平[1] 郑玉平[1] 

机构地区：[1]国电南瑞科技股份有限公司,江苏省南京市210061 [2]State Grid Brazil Holding S.A.,Rio de Janeiro-RJ 20020-080,巴西

出　　处：《电力系统自动化》2012年第24期84-88,共5页Automation of Electric Power Systems

摘　　要：纵联距离保护在串联补偿线路的某些特殊运行情况下可能出现区外故障误动的情况。文中利用一次实际的区外故障调查,分析了电压互感器在不同安装地点对保护的影响,得出在电源容量较小的系统中,双端串联补偿线路不宜使用常规的正反方向四边形距离继电器作为弱馈判别元件,进而给出纵联距离保护的改进措施。最后,讨论了在系统规划设计中对串联补偿电容保护级电流的选择以及串联补偿线路的保护配置。The longitudinal distance protection of series compensated line may appear external-area fault misoperation situations in certain special operating conditions. With an external-area actual fault investigation, the influence of potential transformer installed in different locations on protection is analyzed. It shows that for smaller capacity power system, the conventional forward and reverse direction quadrilateral distance relay as weak feed discriminant components should not be used for double- ended series compensated lines. Then, an improvement scheme for the longitudinal distance protection is given. Finally, the choice of protective level current of series compensation capacitance and protection configuration of series compensated line are discussed.

关 键 词：线路保护 串联补偿 纵联距离保护 

分 类 号：TM773[电气工程—电力系统及自动化]