混合级联单相九电平整流器及其控制策略  

Hybrid cascade single-phase nine-level rectifier and its control strategy

作　　者：朱艺锋[1,2] 周飞杉 贾小磊 张紫阳 李岩 ZHU Yifeng;ZHOU Feishan;JIA Xiaolei;ZHANG Ziyang;LI Yan(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China;Henan Key Laboratory of Intelligent Detection and Control of Coal Mine Equipment,Jiaozuo 454003,China;Xuchang Cigarette Factory of Henan China Tobacco Industry Co.,Ltd.,Xuchang 461000,China)

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454003 [2]河南省煤矿装备智能检测与控制重点实验室,河南焦作454003 [3]河南中烟工业有限责任公司许昌卷烟厂,河南许昌461000

出　　处：《电机与控制学报》2024年第12期118-128,共11页Electric Machines and Control

基　　金：国家自然科学基金(U1804143);河南省科技攻关项目(232102240095,222102240027);河南省高校基本科研业务费专项资金(NSFRF230638)。

摘　　要：混合级联H桥整流器具有谐波性能好、电平数多、耐高压等优点,在电力电子变压器(PET)和电力机车牵引等领域具有良好的应用前景。首先,将传统级联H桥整流器其中一个单元换成含耦合电感的五电平整流单元,构成混合级联单相九电平整流器拓扑,解决了传统1∶3型级联H桥存在功率倒灌的问题。其次,针对该拓扑在分析其工作原理和建立数学模型的基础上,采用外环积分滑模控制(ISMC)和内环比例积分控制(PI)相结合的策略,在保留系统良好动态性能的同时解决了传统滑模控制存在稳态误差的问题。最后,通过在基本冗余矢量作用时间之上叠加补偿分量的方法,解决了级联单元间电容电压不平衡的问题,同时推导了电容电压平衡控制策略所适用的负载不平衡度范围。仿真和实验结果验证了所提拓扑和控制方法的有效性。The hybrid cascaded H-bridge rectifier has the advantages of good harmonic performance,many levels and high voltage resistance,and has good application prospects in the fields of power electronic transformer(PET)and electric locomotive traction.Firstly,one unit of the traditional cascaded H-bridge rectifier was replaced by a five-level rectifier unit with a coupled inductor to form a hybrid cascaded single-phase nine-level rectifier topology,which solves the problem of power backflow in the traditional 1∶3 cascaded H-bridge.Secondly,on the basis of analyzing the working principle and establishing the mathematical model of the topology,the strategy of combining the outer integral sliding mode control(ISMC)with the inner proportional integral control(PI)was adopted to solve the problem of steady-state error of traditional sliding mode control while retaining the good dynamic performance of the system.Finally,by superimposing the compensation component on the basic redundant vector action time,the problem of capacitor voltage imbalance between cascaded units was solved,and the load imbalance range applicable to the capacitor voltage balance control strategy was derived.Simulation and experimental results verify effectiveness of the proposed topology and control strategy.

关 键 词：混合级联H桥整流器 九电平整流器 改进滑模控制策略 稳态误差 电容电压平衡控制 负载不平衡度分析 

分 类 号：TM461[电气工程—电器]