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

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Implementation and Control of AC-DC-AC Power Converter in a Grid-Connected Variable Speed Wind Turbine System with Synchronous Generator

동기기를 사용한 계통연계형 가변속 풍력발전 시스템의 AC-DC-AC 컨버터 구현 및 제어

  • Published : 2005.12.01
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Abstract

A 30kW electrical power conversion system is developed for a variable speed wind turbine. In the wind energy conversion system(WECS) a synchronous generator with field current excitation converts the mechanical energy into electrical energy. As the voltage and the frequency of the generator output vary according to the wind speed, a 6-bridge diode rectifier and a PWM boost chopper is utilized as an ac-dc converter maintaining the constant dc-link voltage with only single switch control. An input current control algorithm for maximum power generation during the variable speed operation is proposed without any usage of speed sensor. Grid connection type PWM inverter converts dc input power to ac output currents into the grid. The active power to the grid is controlled by q-axis current and the reactive power is controlled by d-axis current with appropriate decoupling. The phase angle of utility voltage is detected using software PLL(Phased Locked Loop) in d-q synchronous reference frame. Experimental results from the test of 30kW prototype wind turbine system show that the generator power can be controlled effectively during the variable speed operation without any speed sensor.

Keywords

References

  1. D. Schreiber, 'Applied Designs of Variable Speed Wind Turbines And New Approaches' PCIM, pp. 2002
  2. F. Blaabjerg, Z. Chen, S.B. Kjaer, 'Power Electronics as Efficient Interface in Dispersed Power Generation Systems', IEEE Trans. on Power Electronics, Vol. 19 No. 5, pp. 1184-1194, Sept. 2004 https://doi.org/10.1109/TPEL.2004.833453
  3. 정병창, 임종연, 송승호, 김영민, 노도환, 김동용, '중대형급 풍력발전 시스템용 에너지 변환 방식에 대한 연구', 대한전기학회 전기기기 및 에너지변환시스템 부문학회 춘계학술대회 논문집, pp. 459-462, 2001
  4. L. Grzesiak, W. Koczara, M. da Ponte, 'Application of A Permanent-magnet Machine in the Novel Hygen Adjustable-Speed Load-Adaptive Electricity Generating System', IEEE International Electric Machines and Drives Conf., pp. 398-400, 1999 https://doi.org/10.1109/IEMDC.1999.769126
  5. Y. Higuchi, N. Yamamura, M. Ishida, T. Hori, 'An Improvement of Performance for Small-Scaled Wind Power Generating System with Permanent Magnet Type Synchronous Generator', IEEE IECON Conf., pp. 1037-1043, 2000 https://doi.org/10.1109/IECON.2000.972265
  6. S. Jiao, g, Hunter, V. Ramsden and D. Patterson 'Control System Design for a 20kW Wind Turbine Generator with a Boost Converter and Battery Bank Load', IEEE PESC Conf., pp. 2203-2206, 2001 https://doi.org/10.1109/PESC.2001.954447
  7. M. V. Aware, S. G. Tarnekar, A. G. Kothari, 'Unity power factor and efficiency control of a voltage source inverter-fed variable-speed induction motor drive', IEEE Proceedings-Electr. Power Appl., , Vol. 147 No.5, pp. 422-430, Sept. 2000 https://doi.org/10.1049/ip-epa:20000520
  8. S.-H. Song, S.-I. Kang, N.-K. Hahm, 'Implementation and Control of Grid Connected AC-DC-AC Power Converter for Variable Speed Wind Energy Conversion System' , IEEE-APEC Proceedings, pp. 154-158, 2003 https://doi.org/10.1109/APEC.2003.1179207
  9. E. Hau, 'Windturbines', Springer Verlag, 2000
  10. S. Heier, 'Grid Integration of Wind Energy Conversion Systems' , John Wiley & Sons Ltd, 1998
  11. P.C. Sen, 'Principles of Electric Machines and Power Electronics', 2nd Ed., John Wiley & Sons Ltd, 1997
  12. S.-J. Lee, J.-K. Kang, S.-K. Sul, 'A New Phase Detecting Method for Power Conversion Systems Considering Distorted Conditions in Power System', IEEE-IAS Conf., pp. 2167-2172, 1999 https://doi.org/10.1109/IAS.1999.798754
  13. 정병창, 송승호, 노도환, 김동용, '풍력터빈 모의 실험을 위한 가변 토오크 입력형 시뮬레이터', 대한전기학회 논문지 B부문 제51권 8호, pp. 467-474, 2002
  14. IEEE, '1547 IEEE Standards for Interconnecting Distributed Resources with Electric Power Systems', IEEE Std. 1547, pp. 8-10, 2003