适用于同杆并架线路的弱馈保护方案  

Weak-infeed Protection for Double-circuit Lines on the Same Tower

作　　者：岳蔚[1] 张兆云[1] 

机构地区：[1]国网电力科学研究院/南京南瑞集团公司,南京210083

出　　处：《华东电力》2013年第6期1235-1240,共6页East China Electric Power

摘　　要：同杆并架带弱馈线路发生跨线故障时,弱馈侧保护的选相和方向元件出现问题,可能导致线路失去纵联保护或出现非选择性的跳闸。在分析常见跨线故障时弱馈侧电压电流特征的基础上,提出了一种分相允许式的弱馈回音逻辑用来保证纵联保护正确动作。RTDS仿真结果验证了结论的正确性。When cross-line fault occurs on the double-circuit transmission lines on the same tower, the problems in phase selection and directional relay for weak-infeed side protection may lead to the line pilot protection loss or non- selective trip. By analyzing the weak-infeed side voltage-current characteristics in the case of typical cross-line faults, this paper proposes a new line pilot protection by weak-infeed echo logic with permission by phase. The conclusion is proved by RTDS simulation results.

关 键 词：电力线路 跨线故障 弱馈回音 

分 类 号：TM73[电气工程—电力系统及自动化]