Power Transformation Equipment Management Based on Life Cycle Cost Theory

Based on the life cycle cost theory, the correlative charges during the operation of power transformation equipments are disassembled and a life cycle cost model of power transformation equipments is built.By means of linear regression, 20 sets of cost factor data impacting the secure operation of power transformation equipments are analyzed.Analysis results show that the factors such as being operated years of equipment, the processing frequency of common defects, the acquisition cost and the frequency of condition-based maintenance mainly impact power transformation equipments;the first two factors present positive correlation with failure time and the latter two factors present negative correlation with failure time.On this basis, taking the security control objective as constraint, following suggestions on cost management of power transformation equipments are proposed, they are:the purchase plan of power transformation equipment should be decided in accordance with the dependency degree of power consumers on power supply security;the economic service life of transformation equipments should be determined according to their secure operation and composite costs;the condition-based maintenance should take the place of the periodical planned maintenance.