The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Determining the Compensation Voltages for Dynamic Voltage Restorers by use of PQR Instantaneous Power Theory

PQR 순시전력이론에 의한 동적전압보상기의 보상전압 결정

  • 김효성 (천안공업대학 제어계측과) ;
  • 이상준 ((주)로템 중앙연구소) ;
  • 설승기 (서울대학교 전기컴퓨터공학부)
  • Published : 2003.10.01
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Abstract

This paper discusses how to generate the reference compensation voltages in Dynamic Voltage Restorers (DVR) by use of PQR instantaneous power theory. Sensed three-phase terminal voltages are transformed to PQR coordinates without time delay. Since the reference voltage in PQR coordinates is a single dc value, the voltage controller for DVRs is simple and easy to design. Proposed control method can be implemented by feedforward controllers or by feedback controllers. This paper verified the theory by a feedforward controller of a DVR with simulation and experiment.

본 논문은 PQR 순시전력 이론을 이용하여 순시전압보상장치 (DVR)에서 기준보상전압을 결정하는 방법을 제시한다. 측정된 3상 단자 전압은 시간지연 없이 PQR 좌표계로 변환된다. PQR 좌표계의 기준전압은 단일한 직류값이므로 DVR의 전압제어기는 단순하고 쉽게 설계가 가능해 진다. 제안된 제어방식은 피드백 제어기나 피드포워드 제어기에 모두 적용될 수 있다. 본 논문에서는 피드포워드 제어기에 대하여 이론을 적용하였으며 실험 및 시뮬레이션으로 검증을 하였다.

Keywords

References

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