전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제65권3호
  • /
  • Pages.419-427
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  • 2016
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  • 1975-8359(pISSN)
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  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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DPWM 방식을 적용한 3상 계통 연계 인버터의 LCL-필터 설계

Design of LCL-filter for Grid-Connected Three-Phase Inverters Using a Discontinuous PWM Method

  • Lee, Jung-Rok (Dept. of Electrical and Computer Engineering, Ajou University) ;
  • Seo, Seung Gyu (Dept. of Electrical and Computer Engineering, Ajou University) ;
  • Lee, Kyo-Beum (Dept. of Electrical and Computer Engineering, Ajou University)
  • 투고 : 2015.11.22
  • 심사 : 2016.02.17
  • 발행 : 2016.03.01
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초록

This paper proposes a design method of LCL-filter for a grid-connected three-phase inverter using a discontinuous PWM (DPWM) method. When using a DPWM method, many harmonic voltages are generated in the inverter output compared to a continuous PWM (CPWM) method. Therefore, an optimized grid-connected filter design is required for a DPWM method. The proposed design method provides generalized formula to design accurate LCL-filter without trial and error procedures. An inverter side inductance is designed by analyzing the current ripple injected to the grid. The Optimized parameters of LCL-filter can be designed by analyzing the total harmonic distortion (THD) and the ripple attenuation factor of the output current. The proposed LCL filter design method is demonstrated by simulation and experimental results.

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참고문헌

  1. June-Seok Lee, Hae-Gwang Jeong, and Kyo-Beum Lee, "Active Damping for Wind Power Systems with LCL Filters Using a DFT," Journal of Power Electronics, vol. 12, no. 2, pp. 326-332, Mar. 2012. https://doi.org/10.6113/JPE.2012.12.2.326
  2. Fei Li, Xing Zhang, Hong Zhu, Haoyuan Li, and Changzhou Yu, "An LCL-LC Filter for Grid-Connected Converter:Topology, Parameter, and Analysis," IEEE Transactions on Power Electronics, vol. 30, no. 9, pp. 5067-5077, Sep. 2015. https://doi.org/10.1109/TPEL.2014.2367135
  3. Erika Twining, and Donald Grahame Holmes, "Grid Current Regulation of a Three-Phase Voltage Source Inverter With an LCL Input Filter," IEEE Transactions on Power Electronics, vol. 18, no. 3, pp. 888-895, May. 2003.
  4. Dae-Keun Choi, and Kyo-Beum Lee, "Stability Improvement of Distributed Power Generation Systems with an LCL-Filter Using Gain Scheduling Based on Grid Impedance Estimations," Journal of Power Electronics, vol. 11, no. 4, pp. 599-605, Jul. 2011. https://doi.org/10.6113/JPE.2011.11.4.599
  5. Guoqiao Shen, Dehong Xu, Luping Cao, and Xuancai Zhu, "An Improved Control Strategy for Grid-Connected Voltage Source Inverters With an LCL Filter," IEEE Transactions on Power Electronics, vol. 23, no. 4, pp. 1899-1906, Jul. 2008. https://doi.org/10.1109/TPEL.2008.924602
  6. K. Jalili, and S. Bernet, "Design of filters of active-front-end two-level voltage-source converters," IEEE Transactions on Industrial Electronics, vol. 56, no. 5, pp. 1674-1689, May. 2009.
  7. X. Guo, X. You, X. Li, R. Hao, and D. Wang, "Design method for the LCL filters of three-phase voltage source PWM rectifiers," Journal of Power Electronics, Vol. 12, No. 4, pp. 559-566, Jul. 2012. https://doi.org/10.6113/JPE.2012.12.4.559
  8. M. Liserre, F. Blaabjerg, and S. Hansen, "Design and control of an LCL-filter-based three-phase active rectifier," IEEE Transactions on Industry Applications, Vol. 41, No. 5, pp. 1281-1291, Sep./Oct. 2005. https://doi.org/10.1109/TIA.2005.853373
  9. June-Seok Lee, Seungjong Yoo, and Kyo-Beum Lee, "Novel Discontinuous PWM Method of a Three-Level Inverter for Neutral-Point Voltage Ripple Reduction," IEEE Transactions on Industrial Electronics, in press, Vol. PP, No. 99, pp. 1, Feb. 2016.
  10. Hae-Gwang Jeong, Dong-Keun Yoon, and Kyo-Beum Lee, "Design of an LCL-Filter for Three-Parallel Operation of Power Converters in Wind Turbines," Journal of Power Electronics, Vol. 13, No. 3, pp. 437-446, May. 2013. https://doi.org/10.6113/JPE.2013.13.3.437
  11. Seungjong Yoo, June-Seok Lee, and Kyo-Beum Lee, "A New Discontinuous PWM Method of Three-Level Inverter for Neutral-Point Voltage Ripple Reduction," Power Electronics and ECCE Asia (ICPE-ECCE Asia), pp. 521-526, Jun. 2015.
  12. Min-Young Park, Min-Hun Chi, Jong-Hyoung Park, Heung-Geun Kim, Tae-Won Chun, and Eui-Cheol Nho, "LCL-filter Design for Grid-Connected PCS Using Total Harmonic Distortion and Ripple Attenuation Factor," Power Electronics Conference (IPEC), pp. 1688-1694, Jun. 2010.