A New SVPWM Method for Single-phase Three-level NPC Inverter and the Control Method of Neutral Point Voltage Balance

被引：0
|
作者：
Zhang Zhi [1 ]
Xie Yun-xiang [1 ]
Huang Wei-ping [1 ]
Le Jiang-yuan [1 ]
Chen Lin [1 ]
机构：
[1] S China Univ Technol, Guangzhou 510640, Guangdong, Peoples R China
来源：
2009 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS 1-3 | 2009年
关键词：
Single-phase three-level; capacitor voltage balance; redundant vectors; SVPWM; CONVERTER;
D O I：
暂无
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：
A space vector PWM (SVPWM) algorithm is proposed for the single-phase three-level NPC inverter, and the cause of the imbalance of the capacitor voltage in DC-side is analyzed. In order to lower the switching loss and avoid the abrupt change of output voltage vectors, an optimal SVPWM algorithm is proposed, it makes use of five-vectors modulation in which the positive(or negative) small vectors are used as the first output vector. The strategy of changing the voltage adjusting coefficient to adjust the effective time of the positive and the negative small vectors to control the neutral point potential balance is proposed, which is based on the detection of the direction of the load current and the capacitor voltage. The control of DC link neutral-point potential is easy to implement. The validity of the new SVPWM method is verified by simulation and experiment with a three-level MOSFET inverter.
引用
收藏
页码：702 / 705
页数：4
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