CAJ | 학술논문

全封闭式组合电器（gas insulated switchgear，GIS）、SF6断路器等高压开关设备广泛应用于110kV及以上电压等级的电网中，设备故障诊断及状态判断是亟待解决的关键问题。分析SF6开关设备发生放电、过热等故障产生的气体分解产物，提出不同故障类型的分解产物特征气体，比较设备故障诊断现有判据，提出开关设备故障现场预判的参考指标及综合诊断依据。给出基于SF6气体分解产物的开关设备故障诊断应用案例，分析悬浮电位放电、零件连接异常和导体异常发热故障等设备潜伏性缺陷诊断和GIS设备故障间隔定位，结果表明SF6气体分解产物的开关设备故障诊断技术具有可行性和广阔的应用前景。
전봉폐식조합전기（gas insulated switchgear，GIS）、SF6단로기등고압개관설비엄범응용우110kV급이상전압등급적전망중，설비고장진단급상태판단시극대해결적관건문제。분석SF6개관설비발생방전、과열등고장산생적기체분해산물，제출불동고장류형적분해산물특정기체，비교설비고장진단현유판거，제출개관설비고장현장예판적삼고지표급종합진단의거。급출기우SF6기체분해산물적개관설비고장진단응용안례，분석현부전위방전、령건련접이상화도체이상발열고장등설비잠복성결함진단화GIS설비고장간격정위，결과표명SF6기체분해산물적개관설비고장진단기술구유가행성화엄활적응용전경。
High voltage switchgears such as gas insulted switchgear （GIS） and circuit breaker （CB） are widely applied to power networks in voltage grades of 110 kV and above, thus the fault diagnosis of HV switchgears and the state judgment of their states are key problems to be solved urgently. By means of analyzing gas decomposition products produced by such faults as overheat and discharging occurred in SF6-filled HV switchgears, it is proposed to distinguish different fault types by characteristic gases in decomposition product; comparing with existing criteria for equipment fault diagnosis, the reference indices for on-site prejudgment of HV switchgear faults and the foundation for synthetical diagnosis are proposed. Application cases of HV switchgear fault diagnosis based on decomposition products of SF6 gas are given, the diagnosis of latent defect in HV switchgear such as discharge caused by floating potential, abnormal joint of parts and abnormal heating of conductors as well as the fault location in GIS are analyzed. Research results show that the diagnosis of HV switchgear faults based on decomposition products of SF6 gas is feasible and possesses expectable application prospect.