| Title |
Evaluation of Damage from Reclosing Scheme for Power Transfromer |
| Authors |
오정환(O, Jeong-Hwan) ; 윤상윤(Yun, Sang-Yun) ; 임성정(Im, Seong-Jeong) ; 김재철(Kim, Jae-Cheol) |
| Keywords |
Reclosing Scheme ; Power Transformer ; Fault Current ; Cumulative Damage |
| Abstract |
This paper presents how to evaluate the transformer damage caused by reclosing scheme at the distribution substation. We describe a quantitative relationship between the reclosing scheme and the number of fault current flowing through transformer wsing the probability of a reclosing success/failure. The transformer damage from reclosing scheme is presented using a weight function and a damage function. A weight function is associated with the number of reclosing attempts and the reclosing deadtime to consider cumulative stress caused by reclosing scheme. A damage function is associated with a transformer impact ratio and a transformer functional life. In the case study, the transformer damage is simulated for the probability of a reclosing success. And the evaluation of transformer damage using KEPCO's operation data is performed. |