双向交-直-直PWM变换器无缝开关转换控制技术研究  

Research on Seamless Switching Transition Control Strategy of Bidirectional AC-DC-DC Inverter

作　　者：刘德红[1] 汪光森[1] 胡安[1] 郭俊华[1] 

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,湖北武汉430033

出　　处：《电气传动》2009年第9期27-32,共6页Electric Drive

基　　金：国家自然科学基金资助项目(50737004);(50607020)

摘　　要：为了实现电能的交、直流无缝转换,采用了一种双向交-直-直变换器拓扑结构。该变换器有两种工作状态:交流发电工况和直流发电工况,两种工作状态的转换可以依供电需求手动和自动完成。在简要分析两种工作状态的基本原理后,分别建立其在时域下的数学模型。为了克服直流发电工况时交流侧LCL滤波电路固有振荡及交流发电工况时交流负载不平衡的问题,分别采用虚拟电阻及正、负序分量同步控制策略。同时针对直流侧三重化斩波三相电流环流问题,确立采用动态电流均流的控制策略。实验结果证明了该控制策略的正确性及优越性。In order to make the inverter realize seamless transition for power, a topology of bidirectional AC- DC- DC was proposed. The inverter has two functional mode.. AC-generation mode and DC-generation mode, the transition between them can complete by manual operation or automation according to the need for power supply. After analyzing the principle of them, mathematic model in time-domain was established. By the way of overcoming problem of inherent oscillation for AC side LCL filter in DC-generation mode and load unbalanced in AC-generation mode, virtual resister and positive-negative sequence component values synchro- nous control strategy respectively was utilized. Meanwhile in allusion to the problem of uniform triphase chop- ping circulating current in DC side, dynamic share current control strategy was employed. Experiment results demonstrate the effectiveness of the control strategy.

关 键 词：交-直-直变换器 无缝开关 电流均流 三重化斩波 

分 类 号：TM46[电气工程—电器]