Research on Corrosion Diagnostic Model of Grounding Grid Based on Tellegen's Theorem

Abstract:

Grounding grid was considered as a pure-resistor network and its inner information was obtained through limited grounding leads. A set of diagnostic equations was established based on Tellegen’s theorem. Iteration method and Nonnegative Least Squares method (NNLS) were used to solve it. To verify this method, corrosion diagnosis of single-branch and two-branch was simulated. An optimal plan was proposed in the simulating calculation, which diagnosed step by step and added measurement nodes according to the result of each step. This method is able to determine the corrosion position and degree reliably and the optimal plan has higher efficiency and less workload.

• Periodical: Applied Mechanics and Materials (Volumes 672-674)
• Pages: 783-786
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.672-674.783
• Online since: October 2014
• Authors: Xin An Wu, Li Xue Li, Yi Hui Zheng*, Xin Wang, De Min Cui, Jing Sun
• Keywords: Corrosion Diagnosis, Grounding Grid, Iteration Method, NNLS, Optimal Plan, Pure-Resistor Network, Tellegen’s Theorem

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