摘要
基于有限控制集模型预测控制(FCS-MPC)的滞环模型预测控制(HMPC)应用在三电平逆变器中具有动态响应快、多目标优化处理的优点,但其开关动作没有规律,开关频率波动范围大,导致逆变器输出电流频谱较为分散,不便于滤波器的设计。为了改善上述问题,本文提出一种环宽自适应模型预测控制(AHB-HMPC)方法,将系统的平均开关频率和开关频率波动范围也作为控制目标,引进滞环控制思想,并可在线调整电流滞环大小,使得系统平均开关频率可控且使开关频率稳定在以平均开关频率为中心的滞环内,在保留HMPC快速性、多目标优化处理等优点的同时,有效地使逆变器输出电流频谱相对集中在平均开关频率周围,方便了滤波器的设计。最后,仿真和实验结果表明,本控制方法是可行和有效的。
Hysteresis model predictive control（HMPC） which is based on the finite control set model predictive control（FCS-MPC） has the advantages of fast dynamic response and multi-objective optimization in the three-level inverter.But its switching operation isn＇t regular and the switching frequency fluctuates over a large range,resulting in that the frequency spectrum of the output current is scattered and it is difficult to design the filter.In order to handle these problems,a adaptive hysteresis band hysteresis model predictive control（AHB-HMPC） method is proposed in the paper,which selects the fluctuation range of the switching frequency as a control target.By introducing the idea of hysteresis control and adjusting the current＇s hysteresis size online,the average switching frequency of the system is within the center of hysteresis band,and the frequency of the output current relatively concentrates around the average switching frequency which is convenient for filter design and remains the HMPC＇s advantages known as fast dynamic response and multi-objective optimization.Finally,the simulation and experimental results show that the control method is feasible and effective.
出处
《电气工程学报》
2016年第4期9-14,21,共7页
Journal of Electrical Engineering
关键词
三电平逆变器
滞环模型预测控制
开关频率
Three-level inverter
hysteresis model predictive control
switching frequency
