直流系统接地故障查找及预防措施

摘要

∶直流系统是变电站的一个重要组成部分，确保直流系统的可靠运行是保证电网安全、系统稳定运行的重要前提。随着设备的老化，天气潮湿等原因，直流系统接地现象频频出现，严重威胁着直流系统的稳定运行，给电网的可靠运行带来了一定的安全隐患。结合作者查找直流系统接地的事例，对直流系统的接地原因以及防止直流系统接地的措施进行分析，提出了预防直流系统接地的6项措施，为直流系统设计及运行维护提供一定的借鉴作用。%DC system is an important part of substation and an important precondition for safe and stable operation of power grid. In recent years, DC system grounding phenomenon appeared frequently due to aging of equipment and wet weather, which seriously threatens the system stability. Based on the examples of DC system grounding, the paper an-alyzes the causes and prevention measures thereon and puts forward six prevention measures, which can be well ref-erenced by similar projects.