Research on Cascade Multilevel Inverter Control Strategy

Abstract:

Due to easy realization and high equivalent carrier frequency, the Carrier Phase-Shifted pulse width modulation technology has been applied in the multilevel modulation circuit. Space vector modulation technology has a wide range application because it is easy to realize and has the advantage of high DC voltage utilization. However, when it is directly used in a cascade inverter system, it becomes difficult to be realized because of the too many synthesis voltage vectors and switch states. This paper puts forward a new control strategy based on the technology of carrier phase-shift and vector control by means of combing the advantages of Carrier Phase-Shifted with the SVPWM. The simulation results show that the control strategy is feasible. It is not only has good harmonic characteristic and high equivalent carrier frequency, but also has advantages of high DC voltage utilization and easy digitization.

• Periodical: Applied Mechanics and Materials (Volume 273)
• Pages: 439-443
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.273.439
• Online since: January 2013
• Authors: Zheng Zheng, Fei Yan
• Keywords: Carrier Phase-Shifted, H-Bridge Cascade, SVPWM

References

[1] Liu Fengjun (2007) The Multilevel Inverter Technology and its Application. The Mechanical Industry Press, BeiJing.

[2] Zheng Zheng, Wang Cong(2009) Measures of Suppressing Harmonic Pollution Generated by Power Electronic Equipment . APPEEC 04: 183-185.

DOI: 10.1109/appeec.2009.4918480

[3] Liu Yan(2011) The PWM control technology of multilevel inverter. Knowledge economy press 11: 91-97.

[4] Dai Kaiyun, Shi Zhe(2004) A New Multilevel Space Vector PWM methods. Shanghai Electric Technology (4): 24-28.

[5] Wang Liqiao, Wang Changyong, Zhang Zhongchao(2002)The Research on Combination Converter Phase Shift SVM Technology, The Automation of Electric Power Systems26 (18): 36-40.

[6] Zheng Zheng, Yao Yonggang(2008) The Double PWM Integrated Control Strategy Based on the Virtual Flux, Henan Polytechnic University (9): 547-552.

[7] Lai J S, Fang zheng Peng(1996) Multilevel Converter- A New Breed of Power Converters, IEEE Trans on Industrial Application32 (3) : 509-517.

DOI: 10.1109/28.502161

[8] Luo Zhihui, He Ligao(2009) The Research on the Multilevel Inverter Carrier Phase Shift SPWM and Phase Shift Space Vector Control Strategies, The Electric Transmission and Automation (31): 21-25.