考虑串补电容的超高压输电线路暂态保护判据研究  

Research of protection criterion for EHV transmission line with compensating series capacitor

作　　者：宋丽群[1] 徐波[1] 韩笑[1] 

机构地区：[1]南京工程学院电力工程系,江苏南京210013

出　　处：《电力自动化设备》2005年第1期37-39,共3页Electric Power Automation Equipment

摘　　要：超高压输电线路发生故障时,线路上的串补电容及其保护回路都将在故障时产生附加的暂态分量,利用同一时间段内不同频率分量的衰减程度不同区分区内、区外故障或利用高频暂态量电流信号奇异点(突变点)的奇异性区分区内、区外故障的单端暂态量保护判据,并不适用于带有串联补偿电容的输电线路。给出了一种适用于带有串补电容的输电线路暂态保护新判据,并通过理论分析及算例仿真,证明了其可行性。When fault occurs on EHV(Extra High Voltage) transmission lines,the compensating seriescapacitor and its protective circuit on the lines will cause additional transient components. The non-unit transient-based protection criterion,which uses the energy descent rates of different fre-quencies during a certain period or the Lipschiz degree at singularity point to distinguish internal and external faults,is inapplicable to EHV transmission line with compensating series capacitors.Thus a new transient-based protection criterion for EHV transmission lines with compensating series capacitors is provided. The theoretic analysis and simulative results show that the proposed method is feasible.

关 键 词：超高压 串补电容 单端暂态量保护 保护判据 

分 类 号：TM711[电气工程—电力系统及自动化]