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A Novel Method for Health Level Evaluation of Relay Protection

The defects in relay protection equipment could lead to the incorrect actions of protection equipment, it has occurred from time to time, thus, a lot of attentions have been paid to the health level of protection equipment. It is of great significance to evaluate the health level of relay protection equipment comprehensively. Considering that the health level of relay protection is closely related to its operation and maintenance, this paper establishes a comprehensive evaluation index system for the assessment of relay protection health. First, it presented the evaluation index system for the relay protection equipment with function realization ability, equipment reliability and maintenance efficiency. And then, it uses the improved analytic hierarchy process to obtained the weight of each basic evaluation index, and furthermore, it realizes the comprehensive evaluation for the relay protection health level. Finally, the effectiveness of the evaluation method is verified by different cases. And the measure to for improve the health level of relay protection are discussed.