Online Operation and Inspection Method of Grid Relay Protection Considering Disturbance of Uncertain Factors
The operation of power grid relay protection is disturbed by a large number of uncertain factors.For this reason,an on-line operation inspection method for power grid relay protection is proposed.The power grid relay protection evaluation in-dex system is constructed,and the constant weight and variable weight coefficient of the index are determined by introducing the fuzzy analytic hierarchy process of variable weight theory.This paper improves the set pair analysis model,refine the index set pair connection degree,calculate the index membership degree,and complete the index set pair analysis.This paper then in-tegrates the variable fuzzy set coupling method to build a comprehensive evaluation model based on set pair analysis-variable fuzzy set coupling,and normalize the evaluation indicators,calculate the improved fuzzy connection degree and comprehensive relative membership degree of the set pair.Experimentally verified that this method can analyze the state level of different relay protection indicators during operation,and can realize the correct action rate,device defect times,maintenance conditions and countermeasures of relay protection at different times.
uncertain factorsgrid relay protectiononline operation and inspectionfuzzy hierarchy analysis
万方数据
维普
