一种直流绝缘诊断装置及其检测方法

A kind of DC power system insulation diagnostic device and its detection method

变电站或发电厂设备的直流绝缘下降是一种常见故障,直流电源系统的绝缘选线排查是困扰运维人员的难点问题。本文介绍一种直流绝缘诊断装置及其检测方法,该装置主要由本体、专用线束和指示器组成,体积小,携带方便。装置通过平衡桥原理判断直流绝缘下降情况,再利用霍尔原理检测漏电流的方向,从而实现故障点查找及定位,操作方便,安全性好。实际应用表明,该直流绝缘诊断装置的选线准确性高,无需停电即可进行支路绝缘排查诊断,且省时省力。

DC insulation decline of the equipment in substation or power plant is a common fault.The insulation line selection and investigation of DC power supply system is a difficult point that puzzles operation and maintenance personnel.This paper introduces a DC insulation diagnostic device and its detection method.The device is mainly composed of body,special wiring harness and indicator,and it is small in size and convenient to carry.The balance bridge principle is used to judge the decline of DC insulation,and then Hall principle is used to detect the direction of leakage current,so as to find and locate the fault point,which is convenient to operate and safe.The practical application shows that the DC insulation diagnostic device has high accuracy in line selection,and it can perform insulation inspection and diagnosis without power outage,which is time-saving and labor-saving.