开关柜局部放电抗干扰系统开发研究

Research and Development of Partial Discharge Anti Disturbance System for Switch Cabinet

在高压开关柜局部放电检测过程中,受工作现场外部电磁的干扰,高压开关柜的局部放电检测精度受到影响。基于开关柜局部放电抗干扰系统开发研究,分析了高压开关柜4种局部放电缺陷模型形成的原因以及各自的特点;介绍了开关柜局部放电缺陷模型检测方法的优缺点及原理;搭建了高压开关柜抗干扰检测系统的试验平台,通过试验验证了所开发的基于TEV和接收电磁波接收器双传感器,有效地抑制开关柜表面来自变电站通信干扰噪声以及开关柜外表面的电晕干扰,实现了开关柜局部放电及外部干扰的有效识别与分离。

In the process of partial discharge detection of high voltage switchgear,the partial discharge detection accuracy of high-voltage switchgear is affected by the external electromagnetic interference in the working field of high voltage switchgear. Based on the development and research of partial discharge anti-interference system of switchgear,the reason of the formation of four partial discharge defect models of high voltage switchgear and their respective characteristics were analyzed. The advantages,disadvantages and principles of partial discharge defect model detection in switchgear were introduced. The experimental platform of anti-interference detection system for high voltage switchgear was set up. The dual-sensor based on TEV and receiving electromagnetic wave receiver developed by the experiment is validated to effectively inhibit the interference from the communication noise and the corona interference on the outer surface of the switchgear. It realizes the effective identification and separation of switchgear partial discharge and external disturbance.