三相电压型PWM整流器的虚拟转矩冲量平衡控制策略  

Virtual Torque Impulse Balance Control Strategy for Three-phase Voltage Source PWM Rectifier

作　　者：张成糕 王宇[1] 张艺 郝雯娟[1] 夏宇航 ZHANG Chenggao;WANG Yu;ZHANG Yi;HAO Wenjuan;XIA Yuhang(College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学自动化学院,南京210016

出　　处：《电源学报》2024年第5期150-160,共11页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51977107,U2141227,52377058);航空科学基金资助项目(2020HKZ0001)。

摘　　要：模型预测控制具有结构简单、鲁棒性强和动静态性能良好等优点,因此其在三相电压型PWM整流器系统中得到了广泛应用。然而,模型预测控制的电压外环采用PI线性调节器进行调节,影响了直流侧电压的动态性能。为此提出了虚拟转矩冲量平衡控制策略,从而使直流侧电压仅经过1次调节即可实现快速收敛。为了实现此策略,首先,根据数学模型推导得到了虚拟转矩的表达式;其次,根据负载突变前、后直流侧输出电压保持不变,同时结合功率守恒原则,分析建立了负载突变时的虚拟转矩冲量平衡控制方程,求得零矢量与前进矢量的作用时间;最后,通过仿真和实验实现了三相电压型PWM整流器系统负载突变时的虚拟转矩冲量平衡控制,验证了所提算法的正确性与有效性。Owing to its advantages such as simple structure,strong robustness and good dynamic and static performances,model predictive control(MPC)has been widely applied to three-phase voltage source PWM rectifier systems.However,the PI linear regulator adopted in the voltage outer loop of MPC affects the dynamic performance of DC-side voltage.Aimed at this problem,a virtual torque impulse balance control strategy is proposed to achieve a rapid convergence of DC-side voltage through only one time of regulation.To realize this strategy,the expression of virtual torque is derived based on the mathematical model at first.Second,the virtual torque impulse balance control equation under load mutation is analyzed and established according to the fact that the DC-side output voltage will remain unchanged before and after load mutation while combining the principle of power conservation.Afterwards,the acting time of zero and forward vectors can be obtained.Finally,the virtual torque impulse balance control of the three-phase voltage source PWM rectifier system under load mutation is realized through simulations and experiments,which verifies the correctness and effectiveness of the proposed algorithm.

关 键 词：三相电压型PWM整流器 模型预测控制 动态性能 虚拟转矩冲量平衡控制策略 负载突变 

分 类 号：TM461[电气工程—电器]