基于改进虚拟正交信号的单相PWM整流器模型预测功率控制

Model predictive power control of single-phase PWM rectifier based on improved virtual quadrature signal

针对单相整流器内环动态响应性能受限于虚拟正交分量的重构速度,提出一种基于改进虚拟正交信号的模型预测功率控制算法。针对控制系统中电感设定值与实际值存在偏差,导致单相脉冲宽度调制(PWM)整流器的控制电感参数和系统实际电感参数失配,从而影响模型预测控制的鲁棒性问题,提出一种解决电感失配的补偿算法,该算法通过比例积分环节实时补偿无功功率,消除了电感失配对功率因数的影响。实验结果表明,所提算法不仅明显地提高了单相PWM整流器模型预测的内环动态响应速度,而且能实现模型预测单位功率因数的要求,在一定程度上解决了模型预测电感敏感性问题。

Because the dynamic response performance of the inner loop of single-phase rectifier is limited by reconstruction speed of virtual orthogonal component,a model predictive power control algorithm based on improved virtual orthogonal signals was proposed.In view of the deviation between the set value of the inductance and the actual value in the control system,which leads to a mismatch between the control inductance parameters of the single-phase pulse width modulation(PWM)rectifier and the actual inductance parameters of the system,thereby affecting the robustness of the model predictive control,a solution to the inductance loss was proposed.Equipped with a compensation algorithm,the algorithm compensates reactive power in real time through proportional integration links,the influence of inductance mismatch on power factor was eliminated.The experimental results show that the proposed algorithm not only significantly improves the dynamic response speed of the inner loop predicted by the single-phase PWM rectifier model,but also meets the requirements of the model to predict the unit power factor,and suppresses the inductance sensitivity of the model to a certain extent.