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

The Korean Institute of Power Electronics (전력전자학회)
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Current Control of Three-Phase PWM Converters under Unbalanced and Distorted Source Voltage

전원전압의 불평형 및 왜곡시 3상 PWM 컨버터의 전류제어

  • Published : 2007.02.20
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Abstract

This paper proposes a current control scheme of the PWM converters under nonideal source voltage conditions such as unbalance and distortion. For the distorted source voltage, the harmonic current controllers are introduced to the conventional current controller. These control loops can eliminate the 5th and 7th order harmonics which are hardly to be done by using filters. For the unbalanced source voltage, a negative sequence current controller is introduced either to reduce the DC-link voltage ripples or to eliminate the source current unbalance. Experimental results show the validity of the proposed control scheme.

본 논문은 전원전압이 불평형이고 왜곡될 경우의 3상 PWM 컨버터의 전류제어기법을 제안한다. 전원전압의 왜곡에 대한 대책은 종래의 일반적인 전류 제어기에 5차, 7차 고조파 전류제어기를 추가하여 전원전류에 저차고조파가 나타나는 것을 제거한다. 그리고 전원전압 불평형의 경우, 역상분 전류제어기를 추가함으로써 전원전류를 평형으로 제어하거나 직류출력 전압의 리플을 감소시킬 수 있다. 제안된 제어 알고리즘의 타당성을 실험을 통하여 검증하였다.

Keywords

References

  1. J. W. Dixon and B. T. Ooi, 'Indirect current control of a unity power factor sinusoidal boost type 3-phase rectifier,' IEEE Trans. Ind. Electron., vol. 35, pp. 508-515, Nov. 1988 https://doi.org/10.1109/41.9172
  2. V. Blasko and V. Kaura, 'A new mathematical model and control of a three-phase AC-DC voltage source converter,' IEEE Transactions on Power Electronics, vol. 12, issue 1, pp. 116-123, Jan. 1997 https://doi.org/10.1109/63.554176
  3. P. Enjeti and S. A. Choudhury, 'A new control strategy to improve the performance of a PWM AC to DC converter under unbalanced operating conditions,' in Proc. IEEE-PESC Conf., pp. 382-389, 1991
  4. H. S. Song and K. Nam, 'Dual current controller PWM converter under unbalanced input voltage conditions,' IEEE Trans. on Ind. Elec., vol. 46, no. 5, pp. 953-959, 1999 https://doi.org/10.1109/41.793344
  5. M. Liserre, R. Teodorescu, and F. Blaabjerg, 'Multiple harmonics control for three-phase grid converter systems with the use of PI-RES current controller in a rotating frame,' IEEE Trans. on Power Elec., vol. 21, no. 3, pp. 836-841, 2006 https://doi.org/10.1109/TPEL.2006.875566
  6. J. W. Choi and S. K. Sul, 'New current control concept-minimum time current control in the three-phase PWM converter,' IEEE Transactions on Power Electronics, vol. 12, issue 1, pp. 124-131, Jan. 1997 https://doi.org/10.1109/63.554177
  7. 기초전력공학공동연구소 교육강좌 교재, 전동기 구동시스템의 설계 및 실습-제 10회 하계교육강좌, 2000
  8. 설승기, 전기기기제어론, 홍릉과학출판사, pp. 344-350, 2005