High Voltage Transformer Partial Discharge Detection System Design And Application Research

Discharge happening in some weak parts of high voltage transformer insulation in thestrong electric field is a common problem under high voltage insulation. Although partialdischarge will not cause insulation penetrating breakdown in general, but can lead to a localdamage for dielectric. If the partial discharge exists for a long time, it will be leading toinsulation degradation and breakdown under certain condition. Statistics of the failure in highvoltage transformer type of Anyang power supply company for nearly five years, insulationfault of high-voltage transformer equipment accounted for54.3%in the equipment failure,this paper research on the reason, type and hazards of high-voltage transformer, comparativeanalysis of methods of various partial discharge detection technology at home and abroadcurrently, determine the direction of partial discharge detection based on ultrasonic in thispaper; research directionally by five typical partial discharge model in laboratory, validatedhigh sensitivity by ultrasonic method; develop on-line monitoring devices by partial dischargeultrasonic method of high-voltage transformer, Widespread application of the technology as ofApril2014, found12cases of insulation fault of high voltage transformer equipmenteffectively, avoid the occurrence of accidents and expanding facilities.