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

The Korean Institute of Power Electronics (전력전자학회)
권호 표지
DOI QR코드

DOI QR Code

An Study on the Improved Modeling and Double Loop Controller Design for Three-Level Boost Converter

Three-Level Boost Converter의 개선된 모델링 및 더블 루프 제어기 설계에 관한 연구

  • Lee, Kyu-Min (Dept. of Electrical Eng., Korea Nat'l Univ of Transportation) ;
  • Kim, Il-Song (Dept. of Electrical Eng., Korea Nat'l Univ of Transportation)
  • Received : 2020.03.31
  • Accepted : 2020.07.03
  • Published : 2020.12.20
Download PDF
⟨ Previous Next ⟩

Abstract

A small-signal modeling approach for a three-level boost (TLB) converter and a design methodology for a double-loop controller are proposed in this study. Conventional modeling of TLB converters involves three state variables. Moreover, TLB converters have two operation modes depending on the duty ratio. Consequently, complex mathematical calculations are required for controller design. This study proposes a simple system modeling method that uses two state variables, unlike previous methods that require three state variables. Analysis shows that the transfer functions of the two operation modes can be expressed as identical equations. This condition means that the linear feedback controller can be applied to all operational ranges, that is, for full duty ratios. The design method for a double-loop controller using a PI controller is presented in step-by-step sequences. Simulation and experimental verifications are conducted to verify the effectiveness of the small-signal analysis and control system design.

Keywords

Acknowledgement

이 논문은 2020년 한국연구재단 기초연구과제(NRF-2018R1D1A1B07041728)와 2020년도 산업기술평가관리원(KEIT) 소재부품기술개발사업 연구비지원(G012000120102)으로 작성되었습니다.

References

  1. R. W. Erickson and D. Maksimovic, Fundamentals of power electronics, Springer, 2nd ed., 2001.
  2. S. H. Kim, H. N. Cha, H. G. Kim, and B. C. Choi, "Clamp-mode three-level high voltage gain boost converter using coupled inductor," The Transactions of the Korean Institute of Power Electronics, Vol. 17, No. 6, pp. 500-506, Dec. 2012. https://doi.org/10.6113/TKPE.2012.17.6.500
  3. C. M. Kim and J. S. Kim, "Comparative analysis of efficiency and power density of single-phase and 3-level boost converters for PV system," The Transactions of the Korean Institute of Power Electronics, Vol. 25, No. 2, pp. 127-132, Apr. 2020. https://doi.org/10.6113/TKPE.2020.25.2.127
  4. M. T. Zhang, Y. Jiang, F. C. Lee, and M. M. Jovanovic, "Single-phase three-level boost power factor correction converter," in Proceedings of the 10th Annual Applied Power Electronics Conference and Exposition, pp. 434-439, 1995.
  5. F. Zhang, F. Z. Peng, and Z. M. Qian, "Study of the multilevel converters in DC-DC applications," in Proceedings of the IEEE 35th Power Electronics Specialists Conference, pp. 1702-1706, 2004.
  6. R. Y. Barazarte and G. G. Gonzalez, "Design of a two-level boost converter," in Eleventh LACCEI Latin Acmerican and Caribbean Conference for Engineering and Technology, pp. 1-8, 2013.
  7. M. Lee, J. W. Kim, and J. S. Lai. "Small-signal modeling of three-level boost rectifier and system design for medium-voltage soilid-state transformer," in 2019 10th International Conference on Power Eletronics and ECCE Asia, Busan, pp. 645-651, May. 2019.
  8. M. H. Lee, J. W. Kim, and J. S. Lai, "Derivation of CCM/DCM boundary and ideal duty-ratio feedforward for three-level boost rectifier," in 2019 IEEE Applied Power Electronics Conference and Exposition (APEC), pp. 1173-1179, Mar. 2019.
  9. B. C. Choi, Pulsewidth modulated DC-to-DC power conversion: circuits, dynamics, and control designs, Wiley, Jul. 2013.
  10. J. S. Kim and O. Yang, "Three-level boost converter desing for high efficiency photovoltaic power conditioning system," Advanced Scienceand Thechnology Letters, Vol. 51, pp. 68-72, Jul. 2014.
  11. S. U. Seo, K. J. Lee, R. Y. Kim, and D. S. Hyun, "Improved modeling and control of boost-flyback converter with high step-up voltage ratio," The Transactions of the Korean Institute of Power Electronics, Vol. 17, No. 1, pp. 67-76, Feb. 2012. https://doi.org/10.6113/TKPE.2012.17.1.67