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Evaluation method of transformer damage from auto-reclosing scheme in power distribution system

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5 Author(s)
Jung-Hwan Oh ; Dept. of Electr. Eng., Soongsil Univ., Seoul, South Korea ; Sang-Yun Yun ; Jae-Chul Kim ; Il-Dong Kim
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This paper presents how to evaluate the transformer damage caused by an auto-reclosing scheme in a power distribution system. We describe a quantitative relationship between the reclosing scheme and the number of fault currents flowing through a transformer using the probability of a reclosing success/failure. The transformer damage from the reclosing scheme is formulated as an index that forms a weight function and a damage function. This index is associated with the number of reclosing attempts, a reclosing deadtime and a transformer functional life. In the case studies, the transformer damage is simulated for the probability of a reclosing success. We carried out an evaluation of transformer damage using KEPCO's operation data

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Power Engineering Society Summer Meeting, 1999. IEEE  (Volume:2 )

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