摘要
该文提出了一种单相中点箝位电压源型三电平逆变器。可以减小输出滤波器的尺寸。同时,三电平桥臂开关管的电压应力可以减小为输入电压的一半。文中详细分析了该变换器的 SPWM 控制策略,并且介绍了一种负载电流前馈电路。通过加入这种前馈电路,可以提高逆变器的输出电压外特性。通过一台 1kVA 的原理样机,验证了该变换器的优点和负载电流前馈方法的有效性。
A novel single-phase neutral-point-clamped (NPC) Three-Level (TL) voltage source inverter (VSI) is proposed. The size of the output filter can be reduced greatly, and the voltage stress on the switches of the TL leg can be reduced to half of the input voltage. In this paper, it is detailed to analyze the SPWM controlling strategy and introduce a kind of output current feed-forward circuit. By adding this compensatory circuit, the output character of the inverter is improved. A 1kVA prototype is built to verify the validity of the proposed inverter.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第1期73-76,共4页
Proceedings of the CSEE
