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

The Korean Institute of Power Electronics (전력전자학회)
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Three-Parallel System Operation and Grid-Connection Technique for High-Power Wind Turbines using a PMSG

PMSG를 이용한 풍력 발전 시스템의 3병렬 운전과 계통 연계 기술

  • Received : 2010.05.17
  • Accepted : 2010.07.16
  • Published : 2010.08.20
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Abstract

This paper proposes a design of the three-parallel converter system and grid-connection technique for a PMSG based wind turbine systems. The back-to-back converter of the PMSG based wind turbine system is directly connected to the grid so that both the power devices and the filters are needed to have large power ratings. The three-parallel converter configuration can reduce the required power ratings of the devices and filters. However, the three-parallel converter can cause circulating currents. These circulating currents can be suppressed by sellecting proper inner inductance at each leg. An LCL filter design is used to meet the THD regulations. The latent resonance caused by the LCL filter is compensated by an active damping method without additional loss. The decline of the power quality caused by the unbalanced and distorted grid voltages is also compensated with an additional compensation algorithm. The simulation and experimental results show that the proposed system and compensation methods are effective for the wind turbine systems.

본 논문은 영구자석형 동기발전기를 이용한 풍력발전 시스템의 3병렬 운전과 계통연계 기술을 제안한다. 영구자석형 풍력발전 시스템에서 back-to-back 컨버터는 발전기와 계통에 직접 연결되므로 시스템 정격에 준하는 전력 반도체 소자와 필터가 요구된다. 본 논문은 시스템의 전력변환부를 3병렬로 연결하고 병렬 운전에 의해 발생할 수 있는 순환 전류는 적절한 내부 인덕터 선정으로 해결한다. 낮은 스위칭 주파수로 운전되는 대용량 풍력발전 시스템의 THD 규정을 만족시키기 위해 최적 설계된 LCL필터를 사용하고 LCL필터에 의해 발생할 수 있는 공진 문제는 전력이론을 통한 능동 댐핑 기법을 통하여 추가적인 손실 없이 보상한다. 또한 계통 왜곡 및 불평형 시 발생할 수 있는 전력 품질의 문제는 추가적인 보상 알고리즘을 적용하여 향상시킨다. 시뮬레이션 및 실험을 통하여 병렬 운전 시스템과 알고리즘의 타당성을 검증한다.

Keywords

References

  1. S. T. Jou, S. B. Lee, Y. B. Park, and K. B. Lee, "Direct Power Control of a DFIG in Wind Turbines to Improve Dynamic Responses", Journal of Power Electronics, Vol. 9, No. 5, pp. 781-790, 2009, Sept.
  2. J. Dai, Xu, D.D., B. Wu, "A Novel Control Scheme for Current-Source-Converter-Based PMSG Wind Energy Conversion Systems", IEEE Trans. Power Electronics, Vol. 24, No. 4, pp. 963-972, 2009, Apr. https://doi.org/10.1109/TPEL.2008.2010259
  3. W. Qiao, L. Qu, and R. G. Harley, "Control of IPM Synchronous Generator for Maximum Wind Power Generation Considering Magnetic Saturation", IEEE Trans. Industry Applications, Vol. 45, No. 3, pp. 1095-1105, 2009, May./Jun. https://doi.org/10.1109/TIA.2009.2018914
  4. S. Brabic, N. Celanovic, and Vladimir A. Katic, "Permanent magnet synchronous generator for wind turbine application", IEEE Trans. Power Electronics, Vol. 13, No. 3, pp. 1136-1142, 2008, May.
  5. B. Bolsens, K. De Brabandere, J. Van den Keybus, J. Driesen, R. Belmans, "Model-based generation of low distortion currents in grid-coupled PWM-inverters using an LCL output filter", IEEE Trans. Power Electronics, Vol. 21, No. 4, pp. 1032-1040, 2006, Jul. https://doi.org/10.1109/TPEL.2006.876840
  6. M. Liserre, F. Blaabjerg, and S. Hansen, "Design and Control of an LCL-filter-based Three-Phase Active Rectifier", IEEE Trans. Industry Applications, Vol. 41, No. 5, pp. 1284-1285, 2005, Sept./Oct.
  7. R. Teodorescu, F. Blaabjerg, M. Liserre, and A. Dell'Aquila, "A Stable Three-Phase LCL-filter Based Active Rectifier Without Damping", in Proceedings of IAS'03, pp. 1552-1557, 2003, Oct.
  8. H. S. Kim and F. Blaabjerg, "Instantaneous Power Compensation in Three-Phase Systems by Using p-q-r Theory", IEEE Trans. Power Electronics, Vol. 17, No. 5, pp. 701-710, 2002, Sept. https://doi.org/10.1109/TPEL.2002.802185
  9. H. Akagi, E. H. Watanabe, M. Aredes, Instantaneous Power Theory and Applications to Power Conditoning, Wiley Inter-Science, 2007.
  10. M. P. Kazmierkowski, R. Krishnan, and F. Blaabjerg, Control in Power Electronics, New York Academic, 2002. O. Vodyakho, C. C. Mi, "Three-Level Inverter-Based Shunt Active Power Filter in Three-Phase Three-Wire and Four-Wire Systems," IEEE Trans. Power Electronics, Vol. 24, No. 5, pp. 1350-1363, 2009, May. https://doi.org/10.1109/TPEL.2009.2016663
  11. G. M. Lee , D. C. Lee, J. K. Seok, "Control of series active power filters compensating for source voltage unbalance and current harmonics", IEEE Trans. Industry Applications., Vol. 51, No. 1, pp. 132-139, 2004, Feb.
  12. T. Brekken and N. Mohan, "Control of a Doubly Fed Induction Wind Generator under Unbalanced Grid Voltage Conditions", IEEE Trans. Energy Conversion, Vol. 22, No. 1, pp. 129-135, 2007, Mar. https://doi.org/10.1109/TEC.2006.889550
  13. 정해광, 이교범, 강신일, 이현영, 권오정, 송승호, "전력이론을 이용한 계통연계 PWM 인버터 시스템의 성능 개선", 전력전자학회 논문지, 제13권, 제4호, pp. 319-327. 2008. 8.
  14. M. Malinowski, M. P. Kazmierkowski, S. Hansen, and F. Blaabjerg, "Virtual-Flux-Based Direct Power Control of Three-Phase PWM Rectifiers", IEEE Trans. Industry Applications, Vol. 37, No. 4, pp. 1019-1027, 2001, Jul./Aug. https://doi.org/10.1109/28.936392
  15. H. S. Kim, "Filter Design for Grid-Connected Single-Phase Inverters", Journal of Power Electronics, Vol. 9, No. 4, pp. 623-630, 2009