| 引用本文: | 王贵峰,马一鸣,祝莘莘,刘战.九开关变换器分时协同模型预测电流控制[J].电力自动化设备,2025,45(7):114-120 |
| WANG Guifeng,MA Yiming,ZHU Xinxin,LIU Zhan.Model predictive current control of nine-switch converter based on time-sharing cooperative control[J].Electric Power Automation Equipment,2025,45(7):114-120 |
|
| 摘要: |
| 针对九开关变换器(NSC)有限集模型预测电流控制(FCS-MPCC)中存在计算量较大、输出电流跟踪精度较差等不足，在分时控制基础上引入协同控制思想，充分利用NSC开关管的冗余性，提出一种可使上、下侧变换器同时工作的分时协同FCS-MPCC方法。该方法以2个控制周期为一个循环，前一个控制周期以上侧变换器的输出电流最优为控制目标确定最优矢量，然后基于协同思想与NSC拓扑特点实现下侧变换器输出电流跟随的协同最优控制；后一个控制周期以下侧变换器的输出电流控制最优为目标确定最优矢量，同理实现上侧变换器的协同控制，以此循环往复。与传统矢量寻优方法相比，分时协同控制思想的引入，在NSC上、下侧变换器独立控制基础上实现了电流跟随性能的协同最优控制，有效提高了输出电流跟踪精度；同时，该方法将寻优次数从27次降至8~16次，大幅降低了预测运算量。仿真与实验验证了所提控制策略的有效性与可行性。 |
| 关键词: 九开关变换器 模型预测电流控制 分时协同控制 预测运算量 |
| DOI：10.16081/j.epae.202312034 |
| 分类号:TM46 |
| 基金项目:国家自然科学基金资助项目(51707086) |
|
| Model predictive current control of nine-switch converter based on time-sharing cooperative control |
|
WANG Guifeng, MA Yiming, ZHU Xinxin, LIU Zhan
|
|
School of Electrical Engineering and Automation, Jiangsu Normal University, Xuzhou 221116, China
|
| Abstract: |
| To address the shortcomings of the finite control set model predictive current control(FCS-MPCC) of the nine-switch converter(NSC),such as large computation amount and poor output current tracking performance, a cooperative control idea is introduced on the basis of time-sharing control to make full use of the redundancy of NSC switch tubes, and a time-sharing cooperative FCS-MPCC method is proposed that can make the upper and lower converters work simultaneously. The method uses a two-control-cycle loop, the first control cycle determines the optimal vector with the optimal output current of the upper converter as the control target, and then realizes the cooperative optimal control of the lower converter output current following based on the cooperative idea and the NSC topology characteristics, the second control cycle determines the optimal vector with the optimal output current control of the lower converter as the target, and similarly realizes the cooperative control of the upper converter, and so on and so forth. Compared with the traditional vector optimization method, the introduction of the time-sharing cooperative control idea achieves cooperative optimal control of current-following performance on the basis of independent control of NSC upper and lower converters, which effectively improves the output current quality. Meanwhile, the method reduces the seeking times from 27 to 8-16, which significantly reduces prediction computation load. Simulations and experiments verify the effectiveness and feasibility of the proposed control strategy. |
| Key words: nine-switch converter model predictive current control time-sharing cooperative control prediction computation load |
