Partial Discharge Detection Method of Ring Main Unit Based on Filtered UHF Signal

The conventional partial discharge detection method of the ring main unit mainly focuses on noise reduction, which extracts the characteristics of the partial discharge signal. It is easy to cause the failure of discharge signal detection due to the interference of electromagnetic filtering. Therefore, the partial discharge detection method of the ring main unit based on a filtered UHF signal is designed. The electromagnetic filter interference of the ring main unit bus is identified, the noise of the partial discharge signal is eliminated, the characteristics of the partial UHF discharge signal of the ring main unit are extracted, and the type and mechanism of partial discharge of the ring main unit are analyzed. Based on the filtered UHF signal, the partial discharge detection model is constructed, and the discharge pulse detection circuit is fixed, to realize the effective detection of partial discharge in the ring network cabinet. The simulation experiment verifies that the detection method has higher detection accuracy and can be applied in real life.