摘要
针对高压开关柜早期局部放电缺陷发现率低,故障信号源定性困难,定位准确率差的问题,结合现场实际案例进行分析,提出了基于暂态低电压、特高频和超声波的带电检测方法及幅值定位法和时差定位法的定位技术。应用结果表明:带电检测技术能够在开关柜早期缺陷诊断中发挥重大作用,并有利于设备状态评价与检修工作的开展。
Aiming at the problems such as low rate of the early partial discharge defect discovery, difficult determination of the fault signal sources and poor accuracy of the position for HV switchgear, combining with the practical cases the above problems were analyzed, and the live detection methods were put forward based on the transient earth voltage, ultra high frequency and ultrasonic methods, as well as the positioning technology based on the amplitude positioning method and time difference positioning method. The application results show that the live detection technology can play a significant role in the early defect diagnosis of the switchgear, which is beneficial to operate the state conditioning evaluation and maintenance of the equipments.
出处
《宁夏电力》
2017年第6期53-57,70,共6页
Ningxia Electric Power
关键词
高压开关柜
带电检测
定位技术
早期缺陷
HV switchgear
live detection
positioning technology
early defect
