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DIAGNOZING METHOD OF VOID DEFECT OF ELECTRIC APPARATUS ON THE BASIS OF PARTIAL DISCHARGING PHASE CHARACTERISTICS
DIAGNOZING METHOD OF VOID DEFECT OF ELECTRIC APPARATUS ON THE BASIS OF PARTIAL DISCHARGING PHASE CHARACTERISTICS
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机译:基于局部放电相特征的电气设备空缺诊断方法
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摘要
PURPOSE:To diagnoze rapidly and precisely the kind of a void defect and its generating position by finding out the partial discharging phase characteristics of a partial discharging pulse to applied voltage and detecting similarity of the found partial discharging phase characteristics to previously found diagnozing reference partial discharging phase characteristics. CONSTITUTION:Polarity discriminators 4, 5 for separating a partial discharging pulse into positive and negative polarity pulses, detectors 6, 7 for detecting generated phase angle phi for the level of the partial discharging pulse, i.e. apparent discharged charge (q), and an AC applied voltage and phi-q pattern detectors 8, 9 are formed. In addition, storage devices 10, 11 for storing a diagnozing reference phi-q distribution pattern and similar pattern detectors 12, 13 are also formed. The diagnozing reference cycle average phi-q distribution pattern read out from the storage devices 10, 11 are compared with a pattern obtained from a diagnozed apparatus. Consequently, the diagnosis of the kind of the void defect and its generating position and the forecasting diagnosis of deterioration can be performed rapidly and precisely.
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