基于绕组联接方式的高频三相变压器性能影响分析  

Analysis of High-Frequency Three-phase Transformer Performance Influence Based on Winding Configurations

作　　者：徐一伦 黄峻峰 何丽娜 杨凯帆 陈汝科 刘闯 XU Yilun;HUANG Junfeng;HE Lina;YANG Kaifan;CHEN Ruke;LIU Chuang(College of Electrical Engineering&New Energy,Three Gorges University,Yichang 443000,China;State Grid Shaanxi Electric Power Company,Xian 710048,China;State Grid Hubei Jingmen Power Supply Company,Jingmen 448000,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443000 [2]国网陕西省电力公司,陕西西安710048 [3]国网荆门供电公司,湖北荆门448000

出　　处：《智慧电力》2021年第7期66-72,101,共8页Smart Power

基　　金：国家自然科学基金资助项目(52077120)。

摘　　要：基于高频三相变压器的固态变压器已被证明是实现大功率应用的关键电力电子设备,研究不同绕组联接方式对高频三相变压器性能的影响,对于固态变压器的拓扑结构优化至关重要。根据隔离式三相双有源全桥DC-DC变换器拓扑结构,建立Y-Y、Y-△和△-△型这三种联接方式下的变换器的等效电路和相量图,分析推导了不同绕组联接方式下的电流和传输功率的计算表达式;从开关的ZVS区域、变压器绕组电流和变压器利用率等多方面对变压器的性能进行了研究,并通过仿真验证了理论分析的正确性。结果表明:Y-Y型联接与△-△型联接在ZVS区域、变压器利用率上表现出来相似的性能,Y-Y型联接的绕组电流约为△-△型联接的31/2倍;Y-△型联接具有更宽的ZVS区域,最佳的变压器利用率在功率等级为50%-80%之间。Solid-state transformers based on high-frequency three-phase transformers(HFT3)have been proven to be the key power electronic equipment for high-power applications.The study of the effects of different winding configurations on the performance of HFT3 is studied,which is critical to the optimization of the solid-state transformer topology.Considering the isolated three-phase dual active full-bridge DC-DC converter topology,the equivalent circuit and phasor diagram of the converter with different winding configurations are set up,including Y-Y,Y-△,△-△.The calculation expressions of current and transmission power are derived.Based on the above expressions,the transformer performance is studied from the ZVS region of the switch,transformer winding current and transformer utilization.The results show that the Y-Y configuration and the△-△configuration perform equally in the ZVS region and transformer utilization.The winding current of the Y-Y configuration is about 31/2 times that of the△-△configuration;The Y-△configuration features a wider ZVS region,the optimal transformer utilization rate is between 50%and 80%of the power grade.

关 键 词：高频三相变压器 绕组联接方式 传输功率 性能 

分 类 号：TM421[电气工程—电器]