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| The Unity Theory Between Space Vector and Triangular Carrier PWM Modulation Strategy in Cascaded H Bridge Multilevel Inverter |
| Liu Yunfeng1, He Yingjie1, 2, Wang Chao1, Liu Jinjun1 |
1. School of Electrical Engineering Xi’an Jiaotong University Xi’an 710049 China;
2. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 401121 China |
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Abstract Triangular carrier pulse width modulation (TCPWM) method and the space vector pulse width modulation (SVPWM) method are the two main control methods used in cascaded H bridge multilevel converter. There is a certain relationship between this two modulation strategies, but this relationship has not been well studied so far. Thus, this paper studies the multi-level SVPWM modulation sequence and TCPWM unity. By superimposing zero-sequence onto TCPWM modulation wave, the same effect with the SVPWM modulation is achieved. At last, this paper deduces the unity of the SVPWM and TCPWM in n level with arbitrary number of segment sequences. Simulation and experimental results verify the correctness of the unified theory.
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Received: 09 June 2014
Published: 01 September 2016
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2016, Vol. 31 
