Model and Application of Corrosion Degree Evaluation for Lightning Protection Grounding Device

Corrosion of lightning protection grounding device greatly affects the safety operation of lightning protection system, and seriously causes hidden danger to the safety of lightning protection system. Firstly the corrosion factors affecting the grounding device were reasonably selected to establish a corrosion evaluation index system. Secondly the analytic hierarchy process was used to get the index weight set, and get the signal factor evaluation set based on the expert score. Then the fuzzy comprehensive model was established to evaluate the corrosion degree of lightning protection grounding device. With the instance analysis of lightning protection grounding device at somewhere in Chongqing, this model was used to get the grade of corrosion degree of the grounding device based on the maximum membership principle. The results show that the corrosion degree of grounding device there is medium of degree Ⅲ, and the anti-corrosion measurement is necessary.