变压器角接侧两相故障的远后备保护问题  

REMOTE BACKUP PROTECTION FOR PHASE-TO-PHASE FAULTSAT THE ANGLE-CONNECTED SIDE OF TRANSFORMERS

作　　者：杨旭东[1] 

机构地区：[1]河北省衡水供电公司,河北衡水053000

出　　处：《电力系统自动化》2001年第17期45-46,共2页Automation of Electric Power Systems

摘　　要：探讨了电力变压器的远后备保护问题 ,特别是当变压器角接侧 (非电源侧 )发生两相故障且变压器保护失去直流电源的情况下变压器的远后备保护问题。通过相量图分析此时变压器高、低压侧故障电流的特点 ,进而提出一种远后备保护方案 。This paper mainly discusses the remote backup protection of transformers, especially when the phase-to-phase fault occurs at the angle-connected side (non-power supply side) of transformers and the transformer protection loses its DC power supply. Through the phasor diagram analysis of the fault currents at both sides of transformer, a new remote backup protection scheme is proposed. The scheme completely solves the problem that the remote backup protection is not sensitive enough when phase-to-phase fault occurs at the angle-connected side of transformers.

关 键 词：继电保护 远后备保护 电力变压器 电力系统 微机保护 

分 类 号：TM772[电气工程—电力系统及自动化]