New diagnosis method of unknown phase-shifted PD signals for gas insulated switchgears
IEEE Transactions on Dielectrics and Electrical Insulation(2018)
Abstract
In many cases of on-site PD measurement, it is difficult to acquire the perfect phase angle of the PD signal synchronized with the applied voltage. This paper describes a new method of PD diagnosis which can classify the types of defects for unknown phase-shifted PDs using decision tree method. 327 cases of on-site PD data were collected in the field. 5 valid parameters were extracted and the deci...
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Key words
Partial discharges,Frequency measurement,Voltage measurement,Shape,Phase measurement,Decision trees,UHF measurements
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