CAJ | 학술논문

电厂UPS系统运行中，一点接地是经常发生的异常现象。由于UPS系统是悬浮系统且系统对地电容电流小，所以系统发生接地时，选择接地设备是件很棘手的事情。试拉负荷的方法工作量大，且影响设备正常工作。采用直接测量负荷回路差流的方法，则需要高精度钳形表，而且由于测量环境的电磁干扰，容易发生误判断。采用补偿电流，测量负荷分支差电流变化量的方法，可在不停电的状态下，准确地选出接地设备，以便快速隔离、消除接地点确保UPS系统安全运行。
전엄UPS계통운행중，일점접지시경상발생적이상현상。유우UPS계통시현부계통차계통대지전용전류소，소이계통발생접지시，선택접지설비시건흔극수적사정。시랍부하적방법공작량대，차영향설비정상공작。채용직접측량부하회로차류적방법，칙수요고정도겸형표，이차유우측량배경적전자간우，용역발생오판단。채용보상전류，측량부하분지차전류변화량적방법，가재불정전적상태하，준학지선출접지설비，이편쾌속격리、소제접지점학보UPS계통안전운행。
UPS power system operation,one point grounding is abnormal phenomenon often occurs.The UPS system is a suspension system and the system of small current to ground capacitance,so the system grounding,grounding selection device is tricky.Test method of tensile load workload big,and affect the normal work of equipments.Methods the direct measurement of load loop differential flow,need high precision clamp meter,and because the electromagnetic interference measurement environment,prone to error judgement. The compensation current,load difference measuring method of branch current variation,in the state of no power cut,accurately select earthing equipment,in order to quickly isolate,eliminate the ground to ensure the safe operation of UPS system.