Testability Analysis of Corrosion Diagnosis for Grounding Grids
Niu Tao1, 2, Luo Xianjue1, Wang Sen3, Zhang Debo1, Liu Liqiang1, Zhang Yingjiao1
1. Xi’an Jiaotong University Xi’an 710049 China 2. Jiangsu Electric Power Design Institute Nanjing 211102 China 3. Shaanxi Electric Power Research Institute Xi’an 710045 China
Abstract:Testability of grounding grids is decided by network topology and reachable nodes’ location rather than resistance. In order to research the testability, a new method which applied to corrosion diagnosis is presented. In this method, unreachable nodes are eliminated by network transformation, and then the testability is confirmed gradually in reverse direction. Creditability index is firstly proposed to indicate the credibility of diagnosis result, and the calculating formula is also established. Simulation results show the validity of this approach, and the creditability index can well reflect the errors of diagnosis results. Testability results and creditability index provide valuable information for the actual diagnosis work.
牛涛, 罗先觉, 王森, 张德博, 刘利强, 张英娇. 接地网腐蚀故障诊断可测性分析[J]. 电工技术学报, 2010, 25(6): 192-198.
Niu Tao, Luo Xianjue, Wang Sen, Zhang Debo, Liu Liqiang, Zhang Yingjiao. Testability Analysis of Corrosion Diagnosis for Grounding Grids. Transactions of China Electrotechnical Society, 2010, 25(6): 192-198.