基于热管理的改进型模型预测电流控制研究  

Research on Improved Model Predictive Current Control Based on Thermal Management

作　　者：李壮 吕嘉琪 丁冠华 程红[1] 王聪[1] LI Zhuang;LV Jiaqi;DING Guanhua;CHENG Hong;WANG Cong(School of Mechanical Electronic and Information Engineering,China University of Mining&Technology,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《电源学报》2023年第4期47-55,共9页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51577187);中央高校基本科研业务费资助项目(2021YJSJD15)。

摘　　要：针对传统定频有限集模型预测电流控制FSF-FCS-MPCC(fixed switching frequency finite control set model predictive current control)方法不能实现IGBT器件结温均衡、降低其结温波动和平均温度等问题,以单相PWM整流器为研究对象,提出了一种基于热管理的改进型模型预测电流控制。该方法在两矢量定频预测控制基础上,通过设计评价函数选取最优两矢量及动作序列;其次以采样周期为单位灵活选取2种零矢量交替使用;最后通过调制模块产生相应的开关状态进行控制。为了验证理论分析的正确性和有效性,在小功率实验平台上与传统FSF-FCSMPCC进行了对比研究,结果表明该方法不仅可以实现上述控制目标,而且可以进一步减小网侧电流谐波和稳态误差,提高了开关器件的使用寿命和变换器可靠性。In view of the problems that the traditional fixed switching frequency finite control set model predictive current control(FSF-FCS-MPCC) method cannot realize the junction temperature equilibrium of IGBT devices or reduce the junction temperature fluctuation and average temperature,a single-phase PWM rectifier is taken as the research object,and an improved MPCC method based on thermal management is proposed.Based on the two-vector fixed frequency predictive control,the optimal two vectors and action sequence are selected by designing an evaluation function.Then,the sampling period is taken as a unit,and two kinds of zero vectors are selected flexibly and used alternately.Finally,the corresponding switch state for control is generated through the modulation module.To verify the correctness and effectiveness of the theoretical analysis,a comparative study with the traditional FSF-FCS-MPCC method is carried out on a low-power experimental platform,and results show that this method can not only achieve the above control objectives,but also further reduce the grid-side current harmonic and steady-state error,thus improving the service life of switching devices and the reliability of converters.

关 键 词：单相PWM整流器 模型预测电流控制 结温均衡 结温波动 电流稳态误差 

分 类 号：TM46[电气工程—电器]