一种新型直流绝缘监测方法

摘要

直流绝缘监测系统是变电站直流系统的重要组成部分，对站内设备的安全可靠运行起着重大作用。本文总结了平衡电桥与不平衡电桥法、低频变频信号注入法、磁调制直流漏电流法等在直流监测系统中的应用原理并进行了优缺点讨论，在此基础上提出了一种新型的直流绝缘监测方法，为设计和制造性能良好的绝缘监测装置提供了技术基础。%Insulation monitoring system is an important part of the DC system in transformer substation, it plays a signiifcant role in keeping devices operating under a relatively safe and reliable station. The balanced bridge and unbalanced bridge method, low-frequency signal injection method and magnetic modulation method are summarized in this paper. Both of the advantages and disadvantages for those methods are widely discussed. Then a new method for insulation monitoring system is put forward. The summary and the new method lay a foundation for designing and manufacture a better insulation monitoring device in real application.