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This paper presents a new on-line Partial Discharge Detection Method of cable with the capacitor sensors. The propagation rule of PD signal in the cable joint of the cross-bonding link-system was studied by the method of combining ATP simulation and actual measurement, laying the foundation for the practical application of such sensor.
The transmission characteristics of the PD signal and the interference signals in the cross-bonding link-system of XLPE cable was researched by experiment based on the cross-bonding link-system of cable made exactly according to the real engineering system where the PD detection is initialized in the cable accessories. The experimental results showed that the PD signal can be distinguished from the...
Based on the experiment carried out in the lab on several cable accessories in which there are some typical PD models(In this paper, they are the models of protrusion discharge and floating discharge), the method of VHF Combined with acoustic emission (AE) for detecting PD in the XLPE cable accessories was introduced. The time domain characters of the AE and VHF signals are researched and compared...
In this paper, four 110 kV prefabricated cable joints models containing four kinds of known representative insulation defects were designed. The models can simulate some typical PD phenomena, such as sliding discharge, floating discharge, cavity discharge and protrusion discharge. Based on them, type frequency spectrums of AE PD signals in XLPE cable joints were studied. The investigation indicated...
Based on the experiment carried out in the lab on several cables in which there are some typical PD models, the relationship between the single acoustic signal generated by the partial discharge and the apparent discharge magnitude in a line frequency cycle are researched. Further more, through the detection system which is combined of the VHF PD detection method and the acoustic emission detection...
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