一种用于单相/三相变换的新型电力电子变换技术  

A New Power Electronic Transformation Technology for Single-Phase/Three-Phase

作　　者：朱永强 贾利虎 谢文超 何光泉 王银顺 张雅希 Zhu Yongqiang;Jia Lihu;Xie Wenchao;He Guangquan;Wang Yinshun(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University,Beijing 102206,China;Beijing BOE Display Technology Co.Ltd,Beijing 100176,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206 [2]北京京东方显示科技有限公司,北京100176 [3]不详

出　　处：《电工技术学报》2018年第7期1433-1439,共7页Transactions of China Electrotechnical Society

基　　金：国家高技术研究发展计划(863计划)(2015AA050102)和新能源电力系统国家重点实验室自主研究项目(LAPS2016-14)资助。

摘　　要：研究了一种基于三相桥式逆变器的裂相电路拓扑,其结构与普通的三相桥式逆变器类似,特别之处在于其中两相的输出端与单相电源的两个端子直接连接,其工作原理是:单相电源通过三相桥对直流电容进行充放电,待直流电容电压稳定后,三相桥逆变器即可构造对称的三相交流输出电压。利用功率平衡关系和基尔霍夫定律对电路进行分析,推导出了负载侧获得三相对称电压时三相桥式逆变器的输出电流表达式。通过PSCAD/EMTDC仿真平台与实验样机对所提出的电路拓扑进行了验证,结果表明所提出的电路拓扑能够实现单相/三相变换,且功率关系和电流关系与理论分析一致。This paper studies a novel splitting phase topology based on three-phase full-bridge inverter,which resembles the topology of traditional three-phase full-bridge inverter except for the direct connection of its two-phase output with the two terminals of the single-phase power source.Its operating principles are as follows:single-phase power source first charges the DC capacitor through three-phase full-bridge inverter in a small time period.After the voltage of the DC capacitor achieves stability,threephase full-bridge inverter can output three-phase symmetrical AC voltage.This paper took the advantage of the power balance method and Kirchhoff’s law to analyze the single-phase to three-phase circuit,and then deduced the output current expression of the inverter when three-phase load side gets symmetrical voltage.PSCAD/EMTDC simulation platform and experiment verified the circuit topology,the result shows that the proposed circuit topology enables single-phase to three-phase conversion,and the power relationship as well as the current relationship are the same with the derived expressions,which proves the validity of the analytical method.

关 键 词：裂相电路拓扑 单相电源 三相桥式逆变器 功率平衡 

分 类 号：TM46[电气工程—电器]