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PSCAD/EMTDC를 이용한 양방향 전력거래용 수배전반(USG) 모델링
조현식(HyunSik Jo),이우종(Wujong Lee),차한주(Hanju Cha),이동준(Dong-Zoon Lee),김재언(Jae-eon Kim) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7
본 논문에서는 PSCAD/EMTDC를 이용하여 분산전원의 효율적 활용을 위해 제안한 양방향 전력거래용 수배전반(USG)을 25㎾의 부하에 대하여 모델링 하였으며, 시뮬레이션을 통하여 성능을 확인하였다.
국제 핵융합실험로용 VS(Vertical Stabilization) 컨버터의 운전모드 및 보호동작
조현식(Hyunsik Jo),조종민(Jongmin Jo),오종석(Jong-Seok Oh),서재학(Jae-Hak Suh),차한주(Hanju Cha) 전력전자학회 2015 전력전자학회 논문지 Vol.20 No.2
This study describes the structure and operation modes of vertical stabilization (VS) converter for international thermonuclear experimental reactor (ITER) and proposes a protection method. ITER VS converter supplies voltage (±1000 V)/current (±22.5 kA) to superconducting magnets for plasma current vertical stabilization. A four-quadrant operation must be achieved without zero-current discontinuous section. The operation mode of the VS converter is separated in 12-pulse mode, 6-pulse mode and circulation current mode according to the magnitude of the load current. Protection measures, such as bypass and discharge, are proposed for abnormal conditions, such as over current, over voltage, short circuit, and voltage sag. VS converter output voltage is controlled to satisfy voltage response time within 20 msec. Bypass operation is completed within 60 msec and discharge operation is performed successfully. The feasibility of the proposed control algorithm and protection measure is verified by assembling a real controller and implementing a power system including the VS converter in RTDS for a hardware-in-loop (HIL) facility.