摘要
针对单相电压型PWM整流器易受到负载扰动和电网电压波动的影响问题,为了提高系统稳定性,提出了一种基于旋转坐标变换的前馈解耦和负载电流前馈补偿的控制策略。通过构建正交虚拟电流完成网侧电流的单相旋转坐标变换和采用前馈解耦控制,实现网侧电流的矢量控制和稳定直流母线电压;并根据输入输出功率平衡的关系引入负载电流和网侧电压前馈补偿相结合的方法,降低扰动对单相PWM系统的影响。仿真结果表明,利用改进的控制策略能够提高系统的抗扰动性能,验证了本文所提出的控制策略的正确性和有效性。
For the problem that single - phase voltage PWM rectifier is susceptible to load disturbance and voltage fluctuation of power system, and in order to improve the stability of system, a control strategy of feed forward decou- pling and load current feed forward compensation was proposed based on coordinate transformation. The single phase rotating coordinate transformation of net side current was completed through the construction of orthogonal virtual cur- rent, and then feed forward decoupling control method was used to stabilize the DC bus voltage and realize vector control of the network side current. According to the relationship between input and output power balance, the meth- od combining load current and net vohage feed - forward compensation was introduced to reduce the disturbance of the single - phase PWM system. The simulation results show that the improved control strategy can improve the system's anti - disturbance performance, and the correctness and effectiveness of the proposed control strategy are verified.
出处
《计算机仿真》
CSCD
北大核心
2015年第6期125-129,共5页
Computer Simulation
关键词
单相PWM整流器
抗扰动
单相坐标旋转
前馈解耦控制
Single - phase PWM rectifier
Anti - disturbance
Single - phase Coordinate rotation
Feed - forwarddecoupling control
作者简介
余发山(1952-),男(土家族),湖北长阳人,教授,博士生导师,中国计算机用户协会仿真应用分会副理事长,研究方向为工业过程控制、电力电子传动等。
刘根锋(1988-),男(汉族),河南新密人,硕士研究生,研究方向为工业过程控制。
张宏伟(1980-),男(汉族),安徽萧县人,副教授,博士研究生,研究方向为工业过程控制、直线电机控制等。
耿冲(1987-),男(汉族),河南信阳人,硕士研究生,研究方向为工业过程控制,迭代学习控制。