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논문 기본 정보

저자정보
(Sangmyung University) (Sangmyung University) (Hyosung) (Hyosung) (Hyosung) (Hyosung) (Sangmyung University)
저널정보
대한전기학회 전기학회논문지 전기학회논문지 제75권 제3호
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    초록·키워드

    This paper introduces a novel farm-level controller designed to ensure stable and compliant grid integration for large-scale renewable energy power plants under Korea Electric Power Corporation (KEPCO) Technical Connection Code. In renewable farms operating without a plant controller, the uncoordinated control of individual generators, combined with internal cable impedances, creates challenges in managing voltage and reactive power at the Point of Measurement (POM), thus hindering KEPCO compliance. To address this, our proposed controller directly monitors POM conditions and coordinates turbine output through three functions: dynamic operation mode determination, precise active/reactive power setpoint calculation, and intelligent weighting factor distribution. PSCAD/EMTDC simulations of offshore wind farms confirm its effectiveness. The controller successfully met all KEPCO reactive power standards, including supply capability, output control, power factor, and voltage-reactive power control, which individual generator control could not achieve. Furthermore, fault ride-through simulations, utilizing a proposed current limitation, demonstrated robust grid support via preferential reactive current injection for voltage recovery. A STATCOM capacity assessment was also conducted. Ultimately, this farm-level controller significantly enhances reactive power control, vital for grid stabilization, and validates its adherence to KEPCO's stringent technical criteria.

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      UCI(KEPA) : I410-151-26-02-096344306