一种改进的有源电力滤波器模型预测电压控制

An Improved Active Power Filter Model Predictive Voltage Control

此处提出了一种改进的有源电力滤波器(APF)模型预测电压控制(MPVC)。将模型预测电流控制(MPCC)价值函数中APF提供的补偿电流转换为逆变器输出电压,以减少逆变器输出电压代入APF的离散化数学模型的计算次数。为了减小价值函数滚动优化次数,并简化算法,提出的控制根据空间矢量脉宽调制(SVPWM)的扇区判断思想,缩小备选电压矢量范围。在价值函数中加入开关频率控制环节,以降低开关频率,减小开关损耗,实现对谐波电流和开关频率的多目标控制。仿真结果和实验结果表明:相对于APF MPVC,改进的APF MPVC的APF开关频率更低,稳态精度更高。

An improved active power filter(APF)model predictive voltage control(MPVC)is presented.The compensation current provided by APF in the model predictive current control(MPCC)value function is converted to the output voltage of the inverter to reduce the number of computations of the discrete mathematical model in which the output voltage of the inverter is substituted into the APF.In order to reduce the rolling optimization times of value function and simplify the algorithm,the proposed control reduces the range of alternative voltage vectors based on the sector judgment idea of space vector pulse width modulation(SVPWM).Switch frequency control link is added to the value function to reduce the switch frequency and switch loss,and to achieve multiple objectives control of harmonic current and switch frequency.The simulation results and experimental results show that the improved APF MPVC has lower APF switch frequency,higher steadystate accuracy and faster dynamic response than APF MPVC.