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

The Korean Institute of Power Electronics (전력전자학회)
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A Study on Current Control using a Novel SVM-Based Hysteresis Controller in D-STATCOM

SVM 기반 히스테리시스 제어기를 이용한 D-STATCOM 전류 제어에 관한 연구

  • 최정혜 (현대.기아 연구개발본부) ;
  • 신은철 (고려대 전기공학과) ;
  • 유지윤 (고려대 전기전자전파공학부)
  • Published : 2006.08.01
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Abstract

This paper proposes a control algorithm for STATic synchronous COMpensator(STATCOM), based on Space Vector Modulation(SVM) and Hysteresis Current Controller(HCC) techniques. STATCOM is used to reactive power compensation on a distribution network. The proposed algorithm utilizes the advantages of the fast dynamic response of the hysteresis current control and the reduced switching number of the SVM scheme. The controller determines a set of space vectors from a region detector and applies a space vector. A set of space vectors including the zero vector, to reduce the number of switching, is determined from output signals of two hysteresis comparators. The presented control system was tested with digital simulation in the Borland C++ program and demonstrate the advantage of the proposed hysteresis current controller.

배전급 STATCOM(Distribution-network STATic synchronous COMpensator)에 적용 가능한 공간 벡터 변조 (Space Vector Modulation, SVM) 기법을 이용한 히스테리시스 전류제어기를 제안하였다. 히스테리시스 전류제어기는 빠른 응답 특성, 쉬운 구현, 파라미터 변화에 대한 둔감성 등 많은 장점에도 불구하고 높은 스위칭 주파수와 제한되지 않는 전류 오차 때문에 스위칭 주파수에 영향을 받는 배전급 STATCOM 전류제어기로는 적합하지 않았다. 또한 전압 벡터의 인가방식에서도 뚜렷한 근거가 없어 전류오차가 제한되지 않았다. 이에 본 논문에서는 구역판별기, SVM, 그리고 외부와 내부 히스테리시스 제어기를 이용하여 높은 스위칭 주파수를 저감하고 특정 밴드 내에서 전류 오차를 줄인 개선된 SVM 기반의 히스테리시스 전류제어기를 제안하고 모의실험을 통해 제안한 기법의 유효성을 입증하였다.

Keywords

References

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