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논문 기본 정보

저자정보
(KEPCO Research Institute) (Daegu Catholic University) (Yonsei University) (KEPCO Research Institute) (KEPCO Research Institute)
저널정보
대한전기학회 전기학회논문지 전기학회논문지 제74권 제11호
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    초록·키워드

    On April 28, 2025, Spain experienced Sub-Synchronous Oscillation (SSO) caused by high penetration of inverter-based renewable energy in a weak grid environment with low Short Circuit Ratio (SCR), along with a blackout. This study simulates a comparable event in the Korean power grid using PSS/E. A three-phase fault in the Anjwa region resulted in voltage oscillations. After the voltage exceeded 1.1 pu, which led to the tripping of 6 GW of renewable generation, the frequency dropped below 59.3 ㎐, causing a further 4.5 GW of renewable generation to disconnect. STATCOM and GFM-ESS were implemented to mitigate voltage oscillations through dynamic reactive power support. Further analysis using PSCAD on a simplified grid revealed that the Power Plant Controller (PPC), combining VQ and PF control, effectively resolved the oscillation problem.

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      UCI(KEPA) : I410-151-26-02-094552908