Duplex relay protection reliability evaluation method suitable for localization of core components

The invention provides a dual relay protection reliability evaluation method suitable for localization of core components. The method can quantitatively evaluate the reliability of a dual relay protection device after the domestic core components are replaced. The method comprises the following steps of firstly, based on the relay protection device defect data, determining the core components which urgently need to be localized in the double relay protection device; further, considering the core components urgently needing to be localized and a typical failure mode of the core components, neglecting or merging the situation that the actual probability of occurrence is extremely small, and constructing a dual relay protection Markov model suitable for the localization of the core components; establishing a corresponding state transition matrix based on the double relay protection Markov model, and establishing a reliability index according to an unavailable state in the double relay protection Markov model; an