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

The Korean Institute of Power Electronics (전력전자학회)
권호 표지

The Optimization of Current Control in DC/AC Power Converters under Digital Control with Microprocessor

마이크로프로세서에 의한 디지탈 제어방식에서 직류/교류 전력변환장치 전류제어 성능의 최적화

  • 우명호 (광운대학교 전기공학과 졸업예정(공박)) ;
  • 목형수 (건국대 공대 전기공학과) ;
  • 정승기 (광운대학교 전기공학과)
  • Published : 1998.03.01

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Abstract

In this paper, discrete current control of voltage source inverters is proposed. As a current control scheme, the constant switching frequency predictive current control is adopted and implemented with DSP microprocessor system. In particular, the proposed method is for the compensation of the control lagging due to calculation delays in the microprocessor controller. In controlling the current, the inverter output voltage saturation problem is inevitable and usually affects the current control performance. So, the saturation boundary condition of the inverter output voltage and its effects on the current controal performance of the proposed current control scheme are investigated with experiment. Finally, the proposed scheme is applied to the active power filter system and some results are described for validation.

본 논문은 예측전류제어기의 연산시간에 의한 전압형 PWM 인버터의 과도상태 특성 저하를 개선하기 위한 부분보상 예측전류 제어기에 관한 연구로서, 먼저 부분보상 예측전류제어 시스템에 대한 해석을 통해 과도상태시 정정시간을 최소화할 수 있는 가중치를 구하였다. 또한 부분보상 예측전류제어에 의한 PWM 인버터의 출력전압 포화 경계조건을 유도하여 포화현상이 예측전류제어기의 과도응답 특성에 미치는 영향을 살펴보았다. 끝으로 부분보상 예측전류제어기를 능동전력필터에 적용하여 가중치에 따른 과도응답 특성을 실제전류와 샘플링전류를 중심으로 고찰하였다.

Keywords

References

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