CAJ | 학술논문

本文对近年来10 kV框架式并联电容器装置中推出的差压保护接线用电容器单元的损耗过电压进行了简略计算和分析，得出这种装置中所使用的电容器单元内部只有两个串联段，正常运行时电容器电流大、附加损耗大，易出现发热问题。在电容器出现故障时，易发生过电压传递。由于电容器及连接件的发热和过电压传递而易引起电容器及完好串段破坏，给运行带来隐患。因此，在10 kV电压等级中框架式电容器装置应尽可能少用这种接线，以避免电容器装置故障扩大而危及电力系统安全。
본문대근년래10 kV광가식병련전용기장치중추출적차압보호접선용전용기단원적손모과전압진행료간략계산화분석，득출저충장치중소사용적전용기단원내부지유량개천련단，정상운행시전용기전류대、부가손모대，역출현발열문제。재전용기출현고장시，역발생과전압전체。유우전용기급련접건적발열화과전압전체이역인기전용기급완호천단파배，급운행대래은환。인차，재10 kV전압등급중광가식전용기장치응진가능소용저충접선，이피면전용기장치고장확대이위급전력계통안전。
In this paper, the loss and overvoltage of capacitor unit for differential protection wiring, which is launched recently for 10 kV frame type shunt capacitor devices, is simply calculated and analyzed, and it is concluded that inside the capacitor unit, used in this device, only two serial section, high current of capacitor in normal operation, additional loss increase, heating problems easy to appear. In case of capacitor failure, overvoltage transmission is easily happened. The capacitor and the intact series section are damaged by heating of capacitor and its connectors as well as overvoltage transmission, which will bring hidden danger for operation. Therefore,such wiring at 10 kV frame type capacitor type shall be used as less as possible so to avoid fault development of capacitor device endanger safety of power system.