四线电压源逆变器已成为电源和负载之间的理想接口转换器。在传统有限控制集模型预测控制(Finite Control Set Model Predictive Control，FCS-MPC)下，每个周期内开关管的状态变化没有规律，导致开关频率不固定，输出电能纹波较大。在传统FCS-MPC控制下，逆变器输出的电压方向和大小固定，在整个控制轨迹内可能达不到边界，导致跟踪精度有限。文章提出了基于电容中分式四线制逆变器的在线占空比调制预测控制策略，该策略兼顾FCS-MPC动态响应速度快和调制策略开关频率固定的优势，控制器可在较低的采样率下实现恒定开关频率和最小误差跟踪。
Research on predictive control strategy of on-line duty cycle modulation based on four wire inverter
The four-wire voltage source inverters have become an advisable interfaced converter between the source and loads.However,the switching state of the Finite Control Set Model Predictive control does not change regularly in each cycle,which results in variable switching frequency of the inverter switch and large ripple of the output power.In addition,the direction and size of the inverter output voltage are fixed under the traditional FCS-MPC control,which may not reach the boundary within the whole control track.Therefore,this paper proposes an on-line duty cycle modulation predictive control based on capacitor split four wire inverter.This strategy takes into account the advantages of fast dynamic response of FCS-MPC and fixed switching frequency of modulation strategy,so the controller can achieve fixed switching frequency and zero error tracking at low sampling rates.
万方数据
维普
