Study of hierarchical support technique for managing assets - development of support program for substation equipment

Abstract

Recently, the electric power industry has been facing of difficult problems, such as strong social request of cost cutting and the aging of facilities. Advanced diagnostic techniques are expected to rationalize and improve the operation and maintenance of electric power equipment, but their performance should be evaluated by some objective methods. The “asset management” or “managing assets” technique has been expected to support the rationalization of the maintenance and operation of electric power equipment, and the accountability of these activities. CRIEPI has been examining its introduction in Japan for more than 15 years. It has become apparent that actual maintenance-related data should be collected, and concrete evaluation should be carried out using these data, because individual situations generally differ depending on the equipment used and sometimes on the utility. For examination by the staff of each utility company, concrete support programs have been developed by considering the lifecycle cost for substation equipment (oil-immersed transformers, gas circuit breakers (GCB) and gas insulated switchgears (GIS)). In this paper, these support programs are presented and a trial study of hierarchical managing assets evaluation is carried out.