停送交直流电源对继电保护设备设计的影响分析  

Analysis of Cutoff AC/DC Power Supply Influence on Design of Relay Protection Equipment

作　　者：杨奇 YANG Qi(BEIH Shanxi Zhangshan Electric Power Co.,Ltd,Changzhi 046021,China)

机构地区：[1]京能集团山西漳山发电有限责任公司,山西长治046021

出　　处：《电工电气》2018年第4期28-31,共4页Electrotechnics Electric

摘　　要：基于断开直流分屏电源导致开关误分合及电压互感器二次空开送电导致低电压保护误动的两起事故案例,分析了含有电容、电感等储能元器件回路的电压变化过程。提出了电源监视继电器、中间继电器、分合闸线圈设计选型,并给出了保护动作逻辑判据在电压变化过程中的注意事项,为避免类似事故的发生提供了参考。By two cases that the cutoff direct current split-screen power supply leads to switch false tripping and voltage transformer secondary air switch power transmission leads to low voltage protection malfunction,this paper analyzed the voltage variation process with the energy storage circuits of capacitors and inductors.This paper raised power monitoring relay,intermediate relay,design and typeselection of making and breaking coil.This paper gave the matters needed attention of logic criterion of protection action in the process of voltage variation,to provide references for avoiding similar accidents.

关 键 词：误分闸 直流电源 零输入响应 电压变化 

分 类 号：TM77[电气工程—电力系统及自动化]