一种三相双输出有源中点钳位型三电平变换器  

A Three-Phase Dual-Output Active-Neutral-Point-Clamped Three-Level Converter

作　　者：王秀云[1] 解媛媛 王汝田[1] 刘闯[1] 邵鑫铭 Wang Xiuyun;Xie Yuanyuan;Wang Rutian;Liu Chuang;Shao Xinming(School of Electrical Engineering Northeast Electric Power University,Jilin 132012 China)

机构地区：[1]东北电力大学电气工程学院,吉林132012

出　　处：《电工技术学报》2024年第18期5786-5799,5854,共15页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(52277170)。

摘　　要：该文基于有源中点钳位型三电平变换器(ANPC-TLC)结构,通过每相增加两个开关管形成一种具有两组三相交流电压输出端口的双输出有源中点钳位型三电平变换器(DOANPC-TLC)拓扑。该文详细介绍DO-ANPC-TLC的拓扑结构,对其工作原理进行分析,研究其不同开关状态下的电流路径、输出相电压电平和各开关的电压应力。针对DO-ANPC-TLC结构特点及工作原理,应用一种双输出虚拟空间矢量脉宽调制(DO-VSVPWM)方法,能够独立控制两组交流输出,并保持直流链路电容电压平衡。为了进一步简化控制过程,研究一种基于载波的简化双输出虚拟空间矢量脉宽调制(CB-VSVPWM)策略,在器件损耗和总谐波畸变率(THD)方面,对所提出DO-ANPC-TLC的性能进行分析。实验结果验证了所提拓扑的可行性和调制策略的有效性。The traditional dual-output converter has two identical configuration converters in parallel,using twice the number of switches and driving circuits.It can lead to an increase in size and cost.Therefore,compact dual-output converters for reducing the switch number are getting more and more attention,which couple the circuits of two converters and share some branches or switches.The dual-output converter topology comprises the existing common-parallel-phase approach or the switch-multiplexing method.However,connecting two output terminals in series has a limited modulation index of two outputs,resulting in low utilization of the DC link voltage and a complicated control scheme.Therefore,based on the ANPC-TLC topology,this paper proposes a dual-output active-neutral-point-clamped three-level converter(DO-ANPC-TLC)topology.This topology has two three-phase AC voltage output ports by adding two extra switches per phase.The proposed converter changes the traditional series connection of the two output terminals to a parallel connection so that the modulation index of two outputs does not affect each other.Both sets of outputs can achieve the maximum modulation index under the same or different frequency conditions,which improves the DC link voltage utilization.Firstly,the DO-ANPC-TLC topology is described in detail.Based on the ANPC-TLC topology,the proposed topology utilizes only two extra switches per phase to form the second output port of the converter,and its modulation index is not affected by the first output port.The operating principle of the converter is analyzed,and its current paths,output phase voltage levels,and blocking voltages of each switch in different switching states are studied.Secondly,considering the structure characteristics and operating principle of DO-ANPC-TLC,a dual-output virtual space vector pulse-width modulation(DO-VSVPWM)method is investigated,which can control two sets of AC outputs independently and keep the neutral point voltage balance.To further simplify the control process,a car

关 键 词：双输出 三电平变换器 有源中性点钳位 电容电压平衡 损耗分布 

分 类 号：TM464[电气工程—电器]