Hybrid PWM Strategy of SVPWM and VSVPWM for NPC Three-Level Voltage-Source Inverter

被引：134
|
作者：
Jiang, Wei-dong [1 ]
Du, Shao-wu [1 ]
Chang, Liu-chen [1 ]
Zhang, Yi [1 ]
Zhao, Qin [1 ]
机构：
[1] Hefei Univ Technol, Sch Elect & Automat Engn, Hefei 230009, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2010年 / 25卷 / 10期
关键词：
Hybrid pulsewidth modulation (PWM); neutral-point (NP) clamped (NPC); space vector pulsewidth modulation (SVPWM); three-level inverter; virtual SVPWM (VSVPWM); BALANCE;
D O I：
10.1109/TPEL.2010.2041254
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Neutral-point (NP) voltage drift is the main technical drawback of NP-clamped (NPC) three-level inverters. Traditional space vector pulsewidth modulation (SVPWM) is incapable of controlling the NP voltage for high modulation indexes and low power factors. Virtual SVPWM (VSVPWM) is capable of controlling the NP voltage under full modulation indexes and full power factors. However, this modulation strategy is more complex than SVPWM, increases the switching frequency, and deteriorates the output waveforms of the inverter. A novel PWM concept that includes NP voltage-balancing conditions is proposed. Based on this concept, a hybrid modulation scheme that uses both SVPWM and VSVPWM is presented for complete control of the NP voltage in NPC three-level inverters. The performance of this new modulation approach and its benefits over SVPWM and VSVPWM are verified by simulation and experiments.
引用
收藏
页码：2607 / 2619
页数：13
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