基于特勒根定理的接地网腐蚀诊断研究

Study on corrosion fault diagnosis for grounding grid based on the Tellegen's Theorem

接地网是保证电力系统可靠运行、保证工作人员以及电气设备安全的关键设施,一旦接地网因腐蚀等原因发生故障,将危及电力系统安全运行。针对接地网腐蚀故障,基于特勒根定理,建立接地网故障诊断方程并利用迭代法求解,辨识发生腐蚀故障的支路。实验结果表明,该方法能够有效判定接地网腐蚀故障,提高电力系统接地网的运行可靠性。

Grounding grid is the key measure for the safe operation of power system and the guarantee for the safety of workers and electrical equipment. Once the grounding grid fails due to corrosion and other reasons, the power system security will be in danger. Aiming at the corrosion fault diagnosis of grounding grid, this paper established diagnostic equations of grounding grid fault based on Tellegen＇ s Theorem, and used iteration method to solve the equations. As a result, we can find fault branch which is caused by corrosion. From the experimental result, we can see that the di- agnosis method can find the corrosion fault effectively, and increase the operational reliability of grounding grid in power system.