抄録
Life-cycle management combined with degradation diagnosis is useful for preventing an unexpected failure and extending service life of electric power apparatuses, minimizing life-cycle cost. We examined a method of life-cycle management based on TBM (Time-Based Maintenance) and CBM (Condition Based Maintenance), and evaluated the economic effect of degradation diagnosis. To carry out reliable life cycle management, however, accurate data on the relation between extent of degradation and failure probability or remaining life as well as a well-established diagnostic method are necessary. In this paper, we examine the influence of accuracy of the data used to determine the optimum diagnostic parameters and evaluate how the life-cycle cost is affected by the employment of inaccurate data. As more condition-oriented life-cycle management, we discuss the effects of a method of life-cycle management based on two diagnosis intervals in terms of reliable life-cycle management. We also discuss the measurement sensitivity necessary for an effective asset management based on diagnosis.
