基于体积优化的之字形电力电子变压器并联多脉波整流技术研究  

Research on Parallel Multi-pulse Rectification Technology for Zigzag Power Electronic Transformers Based on Volume Optimization

作　　者：刘千啸 陈小强[1,2] 王英 马春贵 LIU Qianxiao;CHEN Xiaoqiang;WANG Ying;MA Chungui(School of Automation&Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070;Key Lab of Opt-Electronic Technology and Intelligent Control of Ministry of Education,Lanzhou Jiaotong University,Lanzhou 730070)

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070 [2]兰州交通大学光电技术与智能控制教育部重点实验室,兰州730070

出　　处：《电气工程学报》2025年第1期108-118,共11页Journal of Electrical Engineering

基　　金：国家自然科学基金(52067013,52367009);甘肃省科技厅自然科学重点基金(21JR7RA280,22JR5RA318)资助项目。

摘　　要：为了解决传统移相变压器由于体积而限制其适用范围的问题,将电力电子变压器与多脉波整流相结合,通过升频减少变压器内磁心与线圈匝数的数量,进而减小变压器的体积。为了优化传统移相变压器三芯柱磁路不平衡和星角联结结构不对称的问题,使用之字形结构为零序磁通提供通道,从而减少电路中的零序电流,解决二极管桥之间的电流分配不均衡的问题。分析电力电子变换器(User plane entity,UPE)的AC-AC工作原理,研究之字形移相变压器的拓扑结构、整流桥的工作模态,推导出系统的输入电流以及负载电压数学表达式,并对变压器磁路进行分析,对磁心进行了优化设计。通过Simulink搭建仿真模型,相较于传统的电力电子移相变压器系统输入电流提高了对称性,并通过仿真和试验结果验证了理论分析的正确性。To solve the problem of conventional phase shift transformers that limit the scope of application due to their size,the power electronic transformer is combined with multi-pulse rectification to reduce the number of core and coil turns in the transformer through frequency step-up,thereby reducing the size of the transformer.To optimize the structural problems of unbalanced magnetic circuit and asymmetric star-angle coupling structure of traditional phase shifting transformer with three core columns,a zigzag structure is used to provide channels for zero-sequence flux,thus reducing the zero-sequence current in the circuit and solving the problem of unbalanced current distribution between diode bridges.The AC-AC operating principle of user plane entity(UPE)is analyzed,the topology of zigzag phase shift transformer and the operating mode of rectifier bridge are studied,the mathematical expressions of input current and load voltage of the system are derived,and the magnetic circuit of the transformer is analyzed and the core is optimized.The simulation model is built by Simulink,which improves the symmetry of the input current compared with the conventional power electronic phase shift transformer system,and the correctness of the theoretical analysis is verified by the simulation and experimental results.

关 键 词：电力电子变换器 之字形移相变压器 多脉波整流 减小体积 电流分配 

分 类 号：TM461[电气工程—电器]