开关电感准Z源逆变器无权重系数FCS-MPC策略  

inductor quasi-Z-source inverter without weighting factor FCS-MPC strategy

作　　者：刘春喜[1] 林枝伟 刘志乐 徐可 LIU Chunxi;LIN Zhiwei;LIU Zhile;XU Ke(School of Electrical and Control Engineering,Liaoning Technical University,Huludao 125000,China)

机构地区：[1]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125000

出　　处：《电机与控制学报》2025年第3期142-154,共13页Electric Machines and Control

基　　金：辽宁省教育厅科学研究经费重点攻关项目(LJ2020ZD004)。

摘　　要：针对开关电感准Z源逆变器采用有限集模型预测控制(FCS-MPC)时目标函数权重系数设计复杂的问题,提出一种无权重系数的FCS-MPC算法,避免了繁琐的权重系数调整过程。通过伏秒平衡原理分析电感周期性充放电的机理,在直通状态时对电感电流设置一个中间值,根据中间值和预测值的比较来确定下一周期的开关状态,在非直通状态时则采用归一化思想将输出电流和电容电压的目标函数设计为基于动态变化的函数,将误差限制在[0,1]范围内,从而不需要任何权重系数,避免了权重系数的调整过程,最后通过仿真和实验对所提的方法进行验证。结果表明:所提无权重系数FCS-MPC策略与传统FCS-MPC策略相比,在无权重系数的情况下,系统的稳态性能相同,动态性能更优。Aiming at the complexity when designing the objective function weight coefficients for switchedinductance quasi-Z-source inverters using finite-set model predictive control(FCS-MPC),an FCS-MPC algorithm was proposed without weighting coefficients,avoiding the cumbersome weighting coefficient adjustment process.The mechanism of cyclic charging and discharging of inductors was analyzed through the principle of volt-second equilibrium,an intermediate value was set for the inductor current during the on-state,and the switching state of the next cycle was determined based on the comparison of the intermediate value and the predicted value.In the non-through state,the normalization idea was used to design the objective function of the output current and capacitor voltage as a function based on dynamic changes,limiting the error to the range of[0,1],so that no weighting coefficients are needed,avoiding the adjustment process of the weighting coefficients.Finally,the proposed method was validated through simulations and experiments,and the results show that the proposed weightless coefficient FCS-MPC strategy was compared with the traditional FCS-MPC strategy,in the case of no weighting factor,the system has the same steady state performance and better dynamic performance.

关 键 词：开关电感准Z源逆变器 有限集模型预测控制 无权重系数 目标函数 伏秒平衡 归一化 

分 类 号：TM464[电气工程—电器]