新型逆变器改进有限集模型预测控制  

The Improved Finite Control Set Model Predictive Control Method to the New Inverter

作　　者：雷晓犇[1] 李雪丰 王传奇 韩建定[1] LEI Xiao-ben;LI Xue-feng;WANG Chuan-qi;HAN Jian-ding(Aeronautics and Astronautics Engineering College,Air Force Engineering University,Xi’an 710028,China)

机构地区：[1]空军工程大学航空工程学院

出　　处：《控制工程》2019年第12期2199-2204,共6页Control Engineering of China

基　　金：国家自然科学基金(61074007)

摘　　要：针对航空逆变电源输出电压总谐波畸变率(Total Harmonics Distortion, THD)低的要求,在新型逆变电路混合逻辑动态(Mixed Logical Dynamical, MLD)模型的基础上提出了一种改进型有限集模型预测控制方法。在一个控制周期内利用原有8个电压矢量作用不同的时间相互组合增加输出电压矢量的数量,选择电压矢量集中使目标函数值最小所对应开关状态作为电路的控制输入,减小了参考电压与输出电压之间的误差。同时通过对目标函数的优化,在原有采样周期基础上增大控制周期,克服了采样时间和计算时间过长对开关状态选择所造成的影响。该方法减小了输出电压THD且具有良好动静态特性,仿真和实验验证了所提方法的有效性。To aim at the requirement of low total harmonic distortion(THD) in the aviation inverter, an improved finite set model predictive control method is proposed based on the mixed logical dynamical(MLD) model to the new inverter circuit. In a control period, the original 8 voltage vectors are combined with the other one to increase the number of vectors, and the switch states corresponding to the minimum objective function value is selected as the input to reduce the error between the reference voltage and the output voltage. At the same time, by optimizing the objective function and increasing the control period, the influence of long sampling time and calculation time on the switch state selection is overcome. This method reduces the THD of output voltage and has good dynamic and static characteristics, Simulation and experiment verify the effectiveness of the proposed method.

关 键 词：预测控制 采样时间 逆变电路 电压矢量 

分 类 号：TM743[电气工程—电力系统及自动化]