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논문 기본 정보

저자정보
(KEPCO Research Institute) (KEPCO Research Institute) (KEPCO Research Institute)
저널정보
대한전기학회 전기학회논문지 전기학회논문지 제75권 제11호
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    초록·키워드

    This study develops task-specific arc-flash incident-energy analysis and protection criteria using 41 accidents in power facilities from 2018 to 2023. Each case was reconstructed in PSCAD/EMTDC with system impedance, fault type, working distance, equipment geometry, and protective-device characteristics. Incident energy was calculated using IEEE Std 1584-2018 and a high-voltage arc model. The results ranged from 1.37 to 127.1 J/cm² for 14 low-voltage cases and from 12.7 to 613.6 J/cm² for 27 high-voltage cases. Low-voltage metering work was dominated by delayed upstream-fuse clearing, whereas high-voltage transformer, switchgear, VLF, and MOF tasks were affected by long clearing times or short working distances. Only the NFPA 70E incidentenergy analysis method was used for PPE selection; the PPE category table method was not applied. PPE arc ratings must equal or exceed residual incident energy after engineering controls, and de-energized work is prioritized when inputs are uncertain or residual energy exceeds the available protection system.

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