Study on Propagation Characteristics of Partial Discharge Optical Signals Based on Physical GIS Equipment Testing
The optical method is electromagnetically immune and is particularly suitable for partial discharge detection of gas insulated switchgear(GIS)with closed structures.However,the optical signal is easy to decay rapidly with the increase of propagation distance or component occlusion during the propagation process.Therefore,this paper carries out a partial discharge optical signal propagation characteristic test based on the actual 110 kV GIS equipment and explores the influence of propagation distance and insulator occlusion on the partial discharge optical signal of guide rod protrusion defect and floating potential defect.The results show that with the increase of propagation distance,the maximum amplitude and discharge numbers of the detected optical signal are attenuated,and the discharge spectrum does not change much.The amplitude of the optical signal of the floating defect discharge is obviously attenuated,the discharge number remains unchanged,and the characteristics of the discharge spectrum gradually lose the characteristic rectangular characteristic.In addition,when the optical signal propagates through an insulator with a vent,it is significantly attenuated and the amplitude fluctuates greatly.
gas insulated switchgear(GIS)optical measurement methodpropagation characteristicphysical equipmentdischarge spectrogram
万方数据
维普
