摘要
小电流接地选线装置选线准确率低一直困扰着电力系统用户。文中分析了设备选型中的问题和影响选线正确性的因素,提出了现场接地选线的试验步骤,以及固定电阻接地、电弧接地和间歇接地3种现场接地试验方法及注意事项,通过运行5年的实际数据(选线正确率100%)证明了上述试验步骤对提高选线装置准确率的有效性。
Low accuracy rate for small current grounding line selection is always a problem for power system user. The paper analyzed the problems in equipment selection and the factors of influencing the correctness of line selection, put forward the test step as well as the 3 kinds of grounding test method on-site, such as regular resistance grounding, electric arc grounding and intermittence grounding, and its notice item. Through the actual data of 100% line selection accuracy rate in 5 years, the above-mentioned test step for improving the line selection accuracy rate is proved to be valid.
出处
《电力设备》
2007年第11期11-13,共3页
Electrical Equipment
关键词
小电流接地选线
设备选型
现场调试
接地试验
small current grounding line selection
equipment selectin
site commissiunin
grounding test
