摘要
分析了单相三电平脉宽调制(PWM)整流器的工作原理,将d,q坐标系引入该整流器,根据定义的α,β变量推导了基于d,q坐标系的数学模型。根据线性解耦思想,提出了单相三电平PWM整流器的电流解耦控制方法,该方法对解耦后的d,q轴电流分别进行比例控制,并利用输入电压瞬时值进行前馈补偿,极大地降低了控制系统设计的复杂性,并具有良好的线性控制特性。计算机仿真和实验结果表明,基于d,q坐标系的单相三电平PWM整流器矢量控制系统功率因数高、动态性能好,验证了该算法的正确性和有效性。
Working principle of single-phase three-level pulse width modulation （PWM） rectifier is discussed.According to the definition of c~,fl variable, a mathematic model of the PWM rectifier based on the d,q reference frame is set up.Based on linear de, coupled theory,a current decoupled control strategy is proposed which declines significantly complexity of the control system and has good control characteristics.Computer simulation and experimental results demonstrate that this rectifier under current decoupled control has higher power factor and better dynamic performance, which confirms the effectiveness of the improved control strategy.
出处
《电力电子技术》
CSCD
北大核心
2013年第6期23-25,共3页
Power Electronics
关键词
整流器
解耦控制
脉宽调制
rectifier
decoupled control
pulse width modulation
