广东电网变电站接地网安全性状态评估

The Evaluation of Substation Grounding Grid Security State in Guangdong Power Grid

南方电网变电站接地网预防性试验的重点已从单纯定期接地阻抗测量转到以必要时开展接地网安全性状态评估为主的模式。针对接地网状态评估这个全新的试验项目,在总结广东电网近年来变电站接地网状态评估工作的基础上,探讨了开展接地网状态评估的技术路线以及接地分析软件的数值分析作用,对所归纳的接地网安全性状态方面存在的问题,提出了解决方案和对策。

The focus of prevention test to the substation grounding grid of China Southern Power Grid has turned from simply regular measurement of the grounded impedance to mainly performing assessment of the grounding grid security state under necessity. Aiming at the new test project of grounding grid security assessment, and based on the practice of the test in Guangdong Power Grid in recent years, this paper discusses the technology roadmap for substation grounding grid assessment, as well as the important role of numeri-cal analysis with grounding analysis software. Solutions and strategies to deal with the summarized existing problems in grounding grid security state are proposed as well.