Single-Phase Active Power Filter based on Digital Controller

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  • 배병열 (효성(주) 중공업연구소) ;
  • 이지헌 (명지대 공대 전기공학과) ;
  • 이혜연 (명지대 공대 전기공학과) ;
  • 주영아 (명지대 공대 전기공학과) ;
  • 한병문 (명지대 공대 전기공학과) ;
  • 박병주 (전력품질기술(주)) ;
  • 윤동철 (전력품질기술(주) 기술개발팀)
  • Published : 2008.05.01


This paper describes a single-phase active power filter based on a newly developed digital controller. The developed controller utilizes FFT(Fast Fourier Transform) algorithm to extract the reference signal from the load current, considering the phase-angle delay of each order of harmonics. Optimized technique was applied for whole control algorithm to implement the real-time operation of developed controller. The performance of developed controller for a single-phase active power filter was verified through computer simulations with PSCAD/EMTDC. The feasibility of hardware implementation was confirmed by building and testing a prototype. The developed digital controller for a single-phase active power filter can compensate the harmonic current generated by the power supply for digital equipment.


Active Power Filter;Digital Controller;THD;PSCAD/EMTDC


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