Research on zero-sequence signal of space vector modulation for three-level neutral-point-clamped inverter based on vector diagram partition

This paper proposes a novel method for analyzing the zero-sequence signal of three-level voltage-source inverter based on vector diagram partition. The inherent relationship between carried-based PWM and SVPWM is demonstrated. It is shown that the two method can worked equivalently through proper selection of active time for the redundant vector in the case of space vector modulation, or zero-sequence signal injections in the case of carried-based modulation. Furthermore, a novel balancing control strategy of NP potential is proposed based the zero-sequence signal injections. Both simulation and experiment result verify the effectiveness of proposed approach.

[1]  Wenhua Liu,et al.  A neutral-point potential balancing algorithm for three-level NPC inverters using analytically injected zero-sequence voltage , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[2]  Liu Da-ming.  A Novel Algorithm of SVPWM and the Study on the Essential Relationship Between SVPWM and SPWM , 2006 .

[3]  R. S. Kanchan,et al.  Space vector PWM signal generation for multilevel inverters using only the sampled amplitudes of reference phase voltages , 2005 .

[4]  Liu Yu.  RESEARCH ON COMMON-MODE VOLTAGE REDUCTION IN MULTI-LEVEL INVERTER , 2005 .

[5]  He Xiang-ning.  RELATIONSHIP BETWEEN MULTILEVEL CARRIER-BASED PWM AND SVPWM AND ITS APPLICATIONS , 2002 .

[6]  Dong-Seok Hyun,et al.  The analysis and comparison of carrier-based PWM methods for 3-level inverter , 2000, 2000 26th Annual Conference of the IEEE Industrial Electronics Society. IECON 2000. 2000 IEEE International Conference on Industrial Electronics, Control and Instrumentation. 21st Century Technologies.

[7]  Dushan Boroyevich,et al.  A fast space vector modulation algorithm for multilevel three-phase converters , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[8]  V. Blasko.  A hybrid PWM strategy combining modified space vector and triangle comparison methods , 1996, PESC Record. 27th Annual IEEE Power Electronics Specialists Conference.