摘要
建立了三相电压型脉宽调制(PWM)整流器在同步旋转坐标系下的数学模型,针对传统前馈解耦控制在电网不平衡时存在的缺陷,提出改进型前馈解耦控制,并根据非线性反馈线性化理论,推导出线性化方程,从而实现三相电压型PWM整流器有功、无功电流线性化解耦控制;电压外环采用滑模变结构控制,增加系统的鲁棒性与抗负载扰动能力。仿真与实验结果表明,该混合控制能较好地实现三相电压型PWM整流器的线性化解耦控制,完成其功率因数校正及整流器输出特性控制功能,给出了完整的理论分析及实验研究结果。
Aiming at three-phase voltage-source pulse width modulation （PWM） rectifier,mathematical model under synchronous rotating coordinate system for the three-phase voltage-source PWM rectifier is established.Against the de- fects of the traditional feedforward decoupling control working in the unbalanced power system, the improved feedfor- ward decoupling control is put forward.According to the theory of nonlinear feedback linearization, the linear equation is derived.So then the active and reactive current linear decoupling control for the three-phase voltage-source PWM rectifier and sliding mode variable structure control for voltage outer loop are realized.The article increases the robust- ness and the ability of anti load disturbance of the system.Combined with simulation and experiment,the results show that the hybrid control can better achieve the three-phase voltage-source PWM rectifier＇s linearization decoupled con- trol and can complete the function of the power factor correction as well as the function of the control of the output characteristic of the rectifier.The complete theoretical analysis and experimental results are given.
出处
《电力电子技术》
CSCD
北大核心
2016年第8期5-7,共3页
Power Electronics
基金
广州市产学研合作专项(2013Y2-00095)~~
关键词
整流器
脉宽调制
线性化方程
rectifier
pulse width modulation
linear equation
