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

The Korean Institute of Power Electronics (전력전자학회)
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Feedback Linearization Control of PWM Converters with LCL Input Filters

LCL 입력 필터를 갖는 PWM 컨버터의 궤환 선형화 제어

  • Published : 2008.02.20
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Abstract

This paper proposes a feedback linearization control scheme of AC/DC PWM converters with LCL input filters using no damping resisters. This feedback linearization scheme can eliminate the non-linearity of the system. So, the controller of the system can be designed by using linear control theory, which gives a good transient response. The cascade structure of the controller makes the converter current be controlled within a certain limit. To reduce the number of sensors, the source voltage and current is estimated. The validity of the proposed control algorithm is verified by simulation and experimental results.

본 논문에서는 댐핑저항을 사용하지 않고 LCL필터를 사용한 AC/DC PWM 컨버터를 제어하기 위해 다중 루프구조를 갖는 궤환선형화 제어기법을 제안한다. 궤환선형화 기법은 시스템의 비선형성을 제거하여 선형적으로 제어기를 설계할 수 있는 방법으로 우수한 동특성을 얻을 수 있다. 궤환선형화와 더불어 다중루프를 적용하여 컨버터입력전류를 제한함으로써 컨버터의 과전류를 방지할 수 있다. 사용되는 센서의 개수를 줄이기 위해 전원전압과 전원전류가 추정된다. 제시된 제어 알고리즘은 시뮬레이션 및 실험을 통해 그 타당성이 검증된다.

Keywords

References

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