Electrical Insulation Diagnosis and Breakdown Prediction of Gas Insulated Power Apparatus Based on Partial Discharge Mechanism
Partial discharge (PD) has been recognized as an important signal of pre-breakdown phenomenon and the PD measurement has been utilized for electrical insulation diagnosis of SF6 gas insulated equipment such as switchgears (GIS) and circuit breakers (GCB). However, it can be said that the PD measurements, so far, have not always been based on their physical mechanisms, because PD phenomena are very complicated and hard to be measured precisely. Thus, it is generally very difficult to predict breakdown (BD) and life time of electrical insulation.
KeywordsStreamer Discharge Partial Discharge Electron Avalanche Waveform Parameter Leader Discharge
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- 1.H.Okubo, T.Takahashi, N.Hayakawa, Investigation of Partial Discharge Mechanism and Breakdown Prediction Technique in SF6 Gas Insulated Systems, Fourth Workshop & Conference on EHV Technology, Workshop Papers, pp.8–14 (1998)Google Scholar