経年電力設備の保全履歴と設備更新の見極め

概要

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This paper proposes the statistical concept of “maintenance sequence” for evaluating the whole maintenances done in the life of power equipment. Stochastic property of maintenance process is modeled by applying the Poisson process. Occurrence of the successive maintenance is sequentially triggered by the fault rate. In this paper, two types of maintenance sequence have been studied. One is the constant fault rate type; the fault rate is constant until the end of sequence, and this type of sequence is applicable to the repairable equipments such as the circuit breaker. Another is the diminishing maintenance period type; the fault rate explosively increases at the end of sequence, and this type of sequence is applicable to the non-repairable equipment such as the power transformer. This paper also discusses the similarity of the transition curve of maintenance sequence and the deterioration curve of the transmission network facilities.