摘要
系统分析了PWM整流器的数学模型,提出了一种基于α-β静止参考坐标系的双单输入单输出模型,在两相静止坐标系中将PWM整流器简化为两个与传统单相升压变换器类似的电路结构。根据空间矢量调制理论,分析了开关信号由两相静止坐标系到三相静止坐标系变换时的控制策略。根据输入/输出能量平衡原则,对系统设计所需的参数条件进行了分析和实验验证。该模型大大简化了对PWM整流器的分析,并且易于数字实现。实验结果表明,系统能够实现单位功率因数控制,有效地抑制注入电网的谐波,使交流输入电流为正弦波,并且系统具有良好的动态响应。
According to the mathematical model of PWM rectifier, a novel dual single-input single-output model based on α-β stationary reference frame for PWM rectifier is proposed. In this model, the α-axis and β-axis equivalent model are shown to be similar to two traditional single-phase boost converters, and switching strategies are analyzed to determine switching control signals in a switching period based on space vector modulation. According to energy balance condition, a detailed analysis of the parameter conditions required for system design is presented. It is much easier to analyze a complex three-phase PWM rectifier and to implement by digital signal processor （DSP）. The experimental results show that the unit power factor is implemented, the harmonics are suppressed effectively, the sinusoidal line current is achieved and the system has a good dynamic response.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第3期73-80,共8页
Transactions of China Electrotechnical Society
基金
supported by Natural Science Foundation of Shaanxiprovince (2004E214)
Shaanxi provincial project of special foundation of key disciplines
