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

The Korean Institute of Power Electronics (전력전자학회)
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A Grid-interactive PV Generation System with the Function of the Power Quality Improvement

전력품질개선기능을 갖는 계통연계형 태양광 발전시스템

  • 고성훈 (전북대 BK21-전북 전자정보 고급인력양성 사업단) ;
  • 조아란 (군산대 전자정보공학부) ;
  • 강대업 (군산대 전자정보공학부) ;
  • 박천성 (군산대 전자정보공학부) ;
  • 전칠환 (군산대 전자정보공학부) ;
  • 이성룡 (군산대 전자정보공학부)
  • Published : 2007.08.20
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Abstract

In this paper, a grid-interactive photovoltaic (PV) system with the function of the power quality improvement is presented. The proposed system requires only one current-controlled voltage source inverter, which control the current flow at low total harmonic distortion and unity power factor, as well as simultaneously provide reactive power support. The proposed system operation has been divided into two modes (sunny and night). In night mode, the system operates to compensate the reactive power demanded by nonlinear or variation in loads. In sunny mode, the system performs power quality control (PQC) to reduce harmonic current and to improve power factor as well as maximum power point tracking (MPPT) to supply active power from the PV arrays, simultaneously. To verify the proposed system a comprehensive evaluation included simulation and experimental results are presented.

본 논문에서는 전력품질개선기능을 갖는 계통연계형 태양광 발전시스템을 제안한다. 제안된 시스템은 전류제어형 전압원인버터 하나만을 사용하여 단위역률, 고조파저감 그리고 무효전력보상을 동시에 수행한다. 제안된 시스템의 동작모드는 2개의 모드로 구분할 수 있다. 야간모드에서는 PQC를 통해 부하에서 발생하는 무효전력을 보상한다. 주간모드에서는 고조파 저감 및 역률개선을 위한 PQC를 수행하면서 동시에 태양광의 최대전력을 발전하는 MPPT를 수행한다. 본 연구에서 제안한 시스템의 유용성을 확인하기 위해 시뮬레이션과 실험을 수행하였다.

Keywords

References

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