摘要
提出了一种新型的Z源变频调速系统及其空间矢量PWM控制方法。该系统采用近期刚提出的一种Z型L C网络[1 ]代替传统电压源型变频调速系统中的直流链大电容器。由此可以得到以下一些传统变频调速系统无法得到的新特性:1可以输出任何希望的电压值;2在电网电压跌落时具有度越系统故障能力;3降低网测电流谐波和冲击电流。仿真结果证明了该Z源型变频调速系统的上述新特性和空间矢量PWM控制方法的有效性。
This paper presents a new Z-source adjustable speed drive system and its space-vector pulse width modulation (SVPWM) strategy. The proposed Z-source adjustable speed drive (ASD) system employs a unique Z-shape impedance network substituting the DC capacitor in a traditional ASD system to couple the main variable-frequency inverter to the diode front end, thus providing following unique features that cannot be obtained in the traditional ASD system: ①producing any desired output AC voltage, ②ride-through capability under voltage sags, ③reducing line harmonics and in-rush current. The unique features of the proposed Z-source rectifier/inverter system for ASD and the validity of the modified SVPWM control strategy will be verified by simulations.
出处
《电气传动》
北大核心
2005年第5期13-16,共4页
Electric Drive
