Influence of Touchable Nodes Deviation on Grounding Grids Corrosion Diagnosis and Its Correction
Zhizhong Li · Gao dianya jishu · 2008
To evaluate the influence of the touchable nodes deviation due to the normalization of down lead line positions to the nearby nodes on grounding grids corrosion diagnosis,a Monte-Carlo based approach is put forward. The branch resistance vectors are set randomly,based on which,the accuracy and the testability of the results of grounding grids corrosion diagnosis are analyzed. A Tabu search based correction approach is suggested. The diagnosis results in case of deviation are used as the initial solution. The index is to minimize the summation of the squared differences between the observed voltages and the voltages after correction. The results of correction are accessed in quantity. An experimental grounding grid with sixty branches is used as an example,the results of which show that the proposed approach is feasible and that even if there is somewhat uneven corrosion,the correction still works well.y