대한전기학회논문지:전기기기및에너지변환시스템부문B (The Transactions of the Korean Institute of Electrical Engineers B)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

전원 전압 불평형시 계통연계형 인버터의 유효전력 리플 억제를 위한 듀얼 전류제어기 구현과 출력 전력의 실시간 제한 알고리즘

Implementation of Dual Current Controller and Realtime Power Limiting Algorithm in Grid-connected Inverter during Unbalanced Voltage Conditions

  • 송승호 (전북대학교 전자정보공학부) ;
  • 김정재 (한국전기안전공사)
  • 발행 : 2006.01.01
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⟨ 이전 논문 다음 논문 ⟩

초록

A power limiting algorithm is proposed for stable operation of grid-connected inverter in case of grid voltage unbalance considering the operation limit of inverter. During the voltage unbalance the control performance of Inverter. is degraded and the output power contains 120Hz ripple due to the negative sequence of voltage. In this paper, conventional dual sequence current controller is implemented to solve these problems using separated control of positive and negative sequence. Especially the maximum power limit which guarantees the maximum rated current of the inverter is automatically calculated as the instant grid voltage changes. As soon as the voltage recovers the proposed algorithm can return to the normal power control mode accomplishing low voltage ride through. Proposed algorithm is verifed using PSCAD/EMTDC simulations and tested experimentally at 4.4kW wind turbine simulator set-up.

키워드

참고문헌

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