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This paper presents a method for noise elimination when using frequency-tuned resonant system to conduct partial discharge measurement on MV cables. An additional pulse transformer is employed to detect the switching actions and identify the occurrence time. This method is verified through high voltage test on a 10 kV power cable.
This paper discussed the utilization of TEV-Transient Earth Voltage method in PD detection of GIS. The typical defect models in GIS concluding spikes fixed on HV conductor, voids defect in dielectric, suspended metals had been detected by TEV method, PMT, Rogowski monitor and PDCheck system synchronously. The TEV results showed good consistency with other three methods and had a good sensitivity....
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