高电压技术2023，Vol.49Issue(12)：5052-5060,9.DOI:10.13336/j.1003-6520.hve.20221386
开关柜局部放电超声-TEV融合检测技术
Ultrasonic-TEV Combined Detection Technology of Partial Discharge in Switchgear
摘要
Abstract
Switchgear is an important component of power system,and insulation defects will inevitably appear in its delivery and long-term operation,facilitating the failure of equipment.Partial discharge detection is an effective method to detect the insulation defects of switchgear.In order to improve the sensitivity of partial discharge detection in switch-gear,this paper proposes the ultrasonic-TEV combined sensing technology and designs the combined sensor,which realizes the synchronous measurement of ultrasonic signal and TEV signal in space and time.The calibration test results of the combined sensor show that the average sensitivity of ultrasound is 63.90 dB within 20～60 kHz,and the average sensitivity of TEV is 46.98 dB within 1～40 MHz,which meet the requirements of partial discharge detection in switch-gear.Partial discharge tests based on a defect model were carried out on 10 kV switchgear.The results show that the combined sensing technology proposed in this paper can accurately locate the discharge while accurately measuring the partial discharge signal,which provides a new idea and scheme for partial discharge detection in switchgear.关键词
局部放电/高压开关柜/超声/暂态对地电压/融合传感器Key words
partial discharge/high voltage switchgear/ultrasound/transient earth voltage/combined sensor引用本文复制引用
孙源,宋颜峰,王昊天,侯嘉琛,韩旭涛,李军浩..开关柜局部放电超声-TEV融合检测技术[J].高电压技术,2023,49(12):5052-5060,9.基金项目
国家自然科学基金联合基金重点项目(U22B20118).Project supported by State Key Program of National Natural Science Foun-dation Joint Fund of China(U22B20118). （U22B20118）
