Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
권호 표지
DOI QR코드

DOI QR Code

Single Phase PWM Converter For High-Speed Railway Propulsion System Using Discontinuous PWM

불연속 변조 기법을 이용한 고속철도 추진제어장치용 단상 PWM 컨버터

  • Song, Min-Sup (Technical Standard Team, Korea Railroad Research Institute)
  • Received : 2017.05.22
  • Accepted : 2017.07.05
  • Published : 2017.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, for high speed railway propulsion systems, a single phase PWM Converter using discontinuous PWM (DPWM) was investigated. The conventional PWM Converter uses a low frequency modulation index of less than 10 to reduce switching losses due to high power characteristics, which results in low control frequency bandwidth and requires an additional compensation method. To solve these problems, the DPWM method, which is commonly used in three phase PWM Inverters, was adopted to a single phase PWM Converter. The proposed method was easily implemented using offset voltage techniques. Method can improve the control performance by doubling the frequency modulation index for the same switching loss, and can also bring the same dynamic characteristics among switches. Proposed DPWM method was verified by simulation of 100 kW PWM converter.

본 논문에서는 불연속 변조 기법을 이용한 고속철도 추진제어장치용 단상 PWM 컨버터에 대해 연구하였다. 기존 PWM 컨버터는 대 전력 특성으로 인해 스위칭 손실을 줄이기 위해 주파수 변조지수를 10 이하로 낮게 사용함에 따라 제어의 대역폭이 감소하고, 안정적인 역률 제어를 위해 추가의 보상 기법을 필요로 하는 등의 문제점을 가지고 있다. 이를 해결하기 위해 3상 PWM 인버터에서 사용하는 불연속 변조 기법을 단상 PWM 컨버터에 적용하였다. 제안한 방식은 옵셋 전압 기법을 활용하여 간단히 구현될 수 있으며 동일 스위칭 손실 대비 주파수 변조 지수를 2배 증가시켜 제어 특성을 향상시키고 스위치 간의 동특성도 동일하게 가져갈 수 있다. 100 kW급 PWM 컨버터에 대한 시뮬레이션을 통해 제안한 불연속 변조 기법에 대한 타당성을 검증하였다.

Keywords

References

  1. K. Jia (2012) High frequency model of electrified railway propulsion system for EMC analysis, PhD Thesis, KTH School of Electrical Enginerring.
  2. H.C. Kim, J.H. Choi (2007) A study of control algorithm for propulsion systems, Journal of Korean Society Railway, 10(1), pp. 51-56.
  3. B.G Park, D.S. Hyun (2010) An improved feed-forward controller for the parallel operation of a single-phase PWM converter in highspeed trains, Transactions of Korean Institution of Power Electronics, 15(2), pp.226-234. https://doi.org/10.6113/TKPE.2010.15.3.226
  4. A. Schonung, H. Stemmler (1964) Static frequency changers with subharmonic control in conjuction with reversible variable speed AC drives, Brown Boveri Review, pp.555-577.
  5. O. Ojo (2004) The generalized discontinuous PWM scheme for three-phase voltage source inverter, IEEE Transactions on Industrial Electronics, 51(6), pp.1280-1289. https://doi.org/10.1109/TIE.2004.837919
  6. D.W. Chung, J.S. Kim, S.K. Sul (1998) Unified voltage modulation technique for real-time three-phase power conversion, IEEE Transactions on Industry Applications, 34(2), pp.374-380. https://doi.org/10.1109/28.663482
  7. J. Holtz (1994) Pulsewidth modulation for electric power conversion, Proceeding of IEEE, 82(8), pp.1194-1214. https://doi.org/10.1109/5.301684
  8. M. Depenbrock (1975) Pulsewidth control of a 3-phase inverter with non-sinosoidal phase voltages, IEEE International Semiconductor Power Conversion Conference, Orlando, FL, pp.399-403.
  9. V. Blasko (1997) Analysis of a hybrid PWM based on modified space-vector and triangle-comparison methods, IEEE Transactions on Industry Applications, 33(3), pp.756-764. https://doi.org/10.1109/28.585866
  10. A. Hava, R. J. Kerkman, T. A. Lipo (1998) A high performance generalized discontinuous PWM algorthim, IEEE Transactions on Industry Applications, 34(5), pp.1059-1071. https://doi.org/10.1109/28.720446
  11. X.J. Yang, H. Qu, H.J. Tang, C. Yao, et al. (2014) Research on discontinuous pulse width modulation algorithm for single-phase voltage source rectifier, Journal of International Conference on Electrical Machines and Systems, 3(4), pp.433-445. https://doi.org/10.11142/jicems.2014.3.4.433
  12. N. Mohan, T. M. Undeland, W. P. Robbins (2003) Power electronics-converters, Applicaitons and Design, Wiley, NY, pp.243-244.
  13. D. M. Sajnekar, S. B. Deshpande, R. M. Mohril (2013) Comparison of pole placement & pole zero cancellation method for tuning PID controller of a digital excitation control system, International Journal of Scientific and Research Publication, 3(4), pp.1-7.
  14. S.H. Kim (2007) Motor control, Bogdoo publisher, pp.80-87.
  15. S. K. Sul (2011) Control of electric machine drive system, Piscataway, NJ:IEEE Press, pp.161-170.
  16. J. S. Kim (2014) Development of the zero-phase-error speed controller for high performance PMSM drives, The Transactions of the Korean Institute of Power Electronics, 19 (2), pp.184-193. https://doi.org/10.6113/TKPE.2014.19.2.184
  17. D.M. Lee, C.H. Hong (2009) Modeling of SVPWM and control method for driving systems of high-speed trains by using multi-level power converters, Journal of the Korean Institute of Illuminating and Electrical Installation Engineering, 23(12), pp.136-145. https://doi.org/10.5207/JIEIE.2009.23.12.136
  18. R. Teodorescu, F. Blaabjerg, M. Liserre, P. C. Loh (2006) Proportional-resonant controllers and filters for grid-connected voltagesource converters, IEE Proceeding Electric Power Applications, 153(5), pp.750-762.
  19. J.M. Lee, S.J. Jang, S.H. Song, C.Y. Won, K.B. Ahn, J.G. Lee (2004) A Study on DC Power Regeneration for Railway using Parallel PWM Converter, Power Electronics Annual Conference, Danyang, Korea, pp.524-527.
  20. https://powersimtech.com/support/resources/tutorials/thermal-module-igbt-loss-calculation/ (Accessed 22 August 2017)
  21. https://powersimtech.com/support/resources/video-library/use-psim-dll-block/ (Accessed 22 August 2017)