The Transactions of the Korean Institute of Electrical Engineers B (대한전기학회논문지:전기기기및에너지변환시스템부문B)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Digital PLL Control for Phase-Synchronization of Grid-Connected PV System

계통 연계형 태양광 발전 시스템의 위상 동기화를 위한 디지털 PLL 제어

  • 김용균 (경북대학교 전기공학과) ;
  • 최종우 (경북대학교 전자전기공학) ;
  • 김흥근 (경북대학교 전자전기공학부)
  • Published : 2004.09.01
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Abstract

The frequency and phase angle of the utility voltage are important in many industrial systems. In the three-phase system, they can be easily known by using the utility voltage vector. However, in the case of single phase system, there are some difficulties in detecting the information of utility voltage. In conventional system, the zero-crossing detection method is widely used, but could not obtain the information of utility voltage instantaneously. In this paper, the new digital PLL control using virtual two phase detector is proposed with a detailed analysis of single-phase digital PLL control for utility connected systems. The experimental results under various utility conditions are presented and demonstrate an excellent phase tracking capability in the single-phase grid-connected operation.

Keywords

References

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