CAJ | 학술논문

　　电力系统中，对于出线间隔较多的变电站，110千伏、220千伏等电压等级母线采用双母线双分段接线的情况越来越普遍，由于双母线双分段接线特别复杂，且分段开关和电流互感器之间还可能会存在保护死区，母线发生故障时，母差保护、断路器失灵保护等如不能正确动作，会严重影响到电网的安全稳定运行。轻者会导致事故范围扩大、元件受损或烧毁，重者甚至会导致全站失电、局部电网解列等，造成不可估量的损失。本文以电网中最为常见的110千伏双母线双分段接线为例，提出了母差保护、断路器失灵保护等的配置方案，以及对应的二次回路原理及接线，重点解决110千伏分段开关可能存在的保护死区以及分段开关失灵的问题。具有较强的实用性和较高的典型性。
　　전력계통중，대우출선간격교다적변전참，110천복、220천복등전압등급모선채용쌍모선쌍분단접선적정황월래월보편，유우쌍모선쌍분단접선특별복잡，차분단개관화전류호감기지간환가능회존재보호사구，모선발생고장시，모차보호、단로기실령보호등여불능정학동작，회엄중영향도전망적안전은정운행。경자회도치사고범위확대、원건수손혹소훼，중자심지회도치전참실전、국부전망해렬등，조성불가고량적손실。본문이전망중최위상견적110천복쌍모선쌍분단접선위례，제출료모차보호、단로기실령보호등적배치방안，이급대응적이차회로원리급접선，중점해결110천복분단개관가능존재적보호사구이급분단개관실령적문제。구유교강적실용성화교고적전형성。
For substations with more outlet areas in the power system, its 110 kv, 220 kv bus offten adopts double busbar dual segmented wiring. As the double busbar dual segmented wiring is complex, there are dead zone of protection between the section switch and current transformer. When the bus is failure, the wrong operation of differential bus protection and breaker failure protection would seriously influence the safe operation of power grid. It would lead to the accident expending, components are damaged or destroyed;the worst thing is that it would lead to total loss of electricity, and part power grid is splitting, cause immeasurable loss. Based on the most common 110 kv double busbar double segmented wiring, the paper puts forward the configuration scheme of bus protection and breaker failure protection, presents the principle and wiring of corresponding secondary circuit. It solves the problems of dead zone of protection and section switch failure, which has practicability and typicality.