Based on the actual situation of the substation grounding grid,a status evaluation system for the substation grounding grid is built.Through the establishment of a hierarchical structure model and priority judgement matrix,and by applying fuzzy analytic hierarchy process,the priority relationship matrix is transformed into a fuzzy consistent judgement matrix that meets the conditions of consistent convergence.The relational sorting method is used to determine the weight of each factor,so as to determine the relative importance of the selected index in the evaluation system.Then,the weighted average of each index is summed to obtain the current state of the grounding grid of the substation so as to judge the corrosion level.Finally,the evaluation results obtained by comparing with the three-index method prove the correctness and effectiveness of the evaluation method.
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