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作 者:韩金刚[1] 吕肖佳 李翔宇 汤天浩[1] HAN Jin-gang;LU Xiao-jia;LI Xiang-yu;TANG Tian-hao(Shanghai Maritime University,Institution of Power Transmission and Control,Shanghai 201306,China)
机构地区:[1]上海海事大学,电力传动与控制研究所,上海201306
出 处:《电力电子技术》2025年第4期107-110,116,共5页Power Electronics
基 金:国家自然科学基金(61673260)。
摘 要:为了解决传统有限控制集模型预测控制(FCS-MPC)方法运算量大,多目标控制时权重因子设计繁琐等问题,提出了一种分层单目标MPC方法。以级联H桥(CHB)整流器为控制对象,建立控制变量的单目标评估函数,直接计算得到最优值,减少系统的计算量,并采用分层结构对并网电流和输出直流侧电容电压进行控制。与传统的多目标评估函数通过评估和比较所有可能的开关组合来确定最优状态不同,该方法不需要比较来确定最优状态,计算量明显减少。同时,借鉴相邻电平思想,进一步限制所用的分层MPC算法,使得预测的结果更加准确。最后通过实验验证了所提方法的正确性,与FCS-MPC相比,控制器的执行时间减少了24.3%。To solve the problems of the traditional finite control set model predictive control(FCS-MPC)method,such as the large amount of calculation and the cumbersome design of weight factors in multi-objective control,a hierarchical single-objective MPC method is proposed.Taking the cascaded H-bridge(CHB)rectifier as the control object,the single-objective cost function of the control variables is established,the optimal value is obtained by direct calculation to reduce the computation amount of the system,and a hierarchical structure is adopted to control the grid-connected current and the capacitive voltage on the output DC side.Unlike the traditional multi-objective cost function which determines the optimal state by evaluating and comparing all possible switching combinations,this method does not require comparison to obtain the optimal state,and the computational amount is significantly reduced.Meanwhile,draw-ing on the idea of adjacent levels,the hierarchical MPC algorithm is further restricted,which makes the predicted results more accurate.Finally,the correctness of the proposed method is verified experimentally,and the execution time of the controller is reduced by 24.3%compared with FCS-MPC.
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