高压互感器局部放电检测系统设计及应用研究

发布时间：2018-08-08 13:08

【摘要】：高压互感器在强电场的作用下发生局部放电往往存在于绝缘中的某些薄弱部位,该问题在互感器绝缘中普遍存在。一般情况下局部放电虽然不会引起穿透性绝缘击穿,但电介质可以导致局部损坏。局部放电若长期存在,绝缘在一定条件下会导致劣化甚至出现击穿。统计国网安阳供电公司近五年高压互感器故障类型,高压互感器设备的绝缘性故障占该设备故障的54.3%,本文通过调研高压互感器故障产生的原因、类型和危害,对比分析目前国内外各种局放检测技术的方法,确定本文基于超声波法检测局部放电的方向;通过实验室研究五种典型局部放电模型,验证了超声波法的高灵敏度;开发了高压互感器局部放电超声波法在线监测装置并进行了现场试验,截止2014年4月该项技术的应用,共发现高压互感器设备绝缘故障12起,由于发现及时有效地避免了设备事故的发生和扩大。
[Abstract]:The partial discharge of high voltage transformer under the action of strong electric field often exists in some weak parts of insulation, which is a common problem in the insulation of transformer. In general, partial discharge does not cause penetrating insulation breakdown, but dielectric can cause partial damage. If partial discharge exists for a long time, insulation will lead to deterioration or even breakdown under certain conditions. The fault types of high voltage transformers in Anyang Power supply Co., Ltd are counted in recent five years. The insulation faults of high voltage transformers account for 54.3 of the faults of the equipment. This paper investigates the causes, types and harms of the faults of high voltage transformers. By comparing and analyzing various methods of PD detection at home and abroad, this paper determines the direction of PD detection based on ultrasonic method, and verifies the high sensitivity of ultrasonic method by studying five typical PD models in laboratory. The on-line monitoring device of partial discharge ultrasonic method for high voltage transformer is developed and the field test is carried out. As of the application of this technology in April 2014, a total of 12 insulation failures of high voltage transformer equipment have been found. Due to the discovery of timely and effective to avoid the occurrence and expansion of equipment accidents.
【作者单位】：安阳供电公司;
【分类号】：TM855;TM45

【参考文献】