新一代高频隔离级联式中高压变频器的协调方式研究  

Coordination model of new-generation high-frequency isolated cascaded medium and high voltage inverters

作　　者：程红[1] 于志超 王朋辉 徐正 王聪[1] CHENG Hong;YU Zhi-chao;WANG Peng-hui;XU Zheng;WANG Cong(School of Mechanical Electronic and Information Engineering,China University of Mining and Technology(Beijing),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：《煤炭工程》2020年第7期147-151,共5页Coal Engineering

基　　金：国家自然科学基金项目(51577187);中央高校基本科研业务费资助项目(2009KJ02)。

摘　　要：新一代高频隔离级联式中高压变频器取消了传统的工频变压器的使用,并减少了全控型开关器件的数量,提高了系统的功率密度。在实际应用中常常存在负载不平衡以及电网不平衡等问题,因此提出了一种整流-逆变级双星型交错连接以及隔离级变换器的多绕组共铁芯变压器的新型结构方式,从系统协调的角度解决不平衡状况导致的直流电压不平衡的问题以及实现故障隔离。详细分析该结构拓扑的功率传输特性,最后,搭建仿真验证了所提结构的可行性。The new generation of high-frequency isolated cascaded medium and high voltage inverters eliminate the traditional power frequency transformer,reduce the number of fully controlled switching devices,and increase the power density of the system.In practice,the problems such as load imbalances and power grid imbalances.A new structure of rectifier-inverter double star staggered connection and isolation stage converter with multi-winding common iron core transformer was proposed.From the perspective of system coordinated control,this structure can solve the problem of unbalanced DC voltage caused by unbalanced conditions and realize fault isolation.The power transmission characteristics of the topology are analyzed in detail.Finally,simulations are conducted to verify the feasibility of the proposed structure.

关 键 词：电力电子变频器 协调方式 双星型交错连接 多绕组共铁芯变压器 电压均衡 

分 类 号：TM461[电气工程—电器]