并网分离源逆变器解耦控制  

Decoupling control of grid-connected split-source inverter

作　　者：杨旭红 陆浩 郝鹏飞 姚凤军 YANG Xu-hong;LU Hao;HAO Peng-fei;YAO Feng-jun(School of Automation Engineering,Shanghai University of Electric Power,Shanghai 200082,China)

机构地区：[1]上海电力大学自动化工程学院,上海200082

出　　处：《电机与控制学报》2022年第4期99-106,共8页Electric Machines and Control

基　　金：上海市电站自动化技术重点实验室(13DZ2273800);上海市重点科技攻关计划(14110500700)。

摘　　要：可再生能源电力并网转换系统存在结构复杂、成本高及效率低等突出问题,两级式的转换器无法满足系统要求,而单级式结构转换器的提出能够很好地解决这个问题。单级式存在不同的拓扑结构,如Z源逆变器、Y源逆变器等。本文提出的分离源逆变器是一种仅使用逆变电桥就可以灵活升高或降低交流输出电压,而且具有优于其他拓扑结构的优点,并且可以使用与传统电压源逆变器相同的调制方案。首先对三相分离源逆变器(SSI)进行分析,然后在并网连接模式下提出一种改进调制方案,使输出电压电流波形更稳定;并基于同步旋转坐标系下的改进闭环控制,及对直流侧和交流侧分别进行独立的控制,以实现并网SSI的解耦控制。仿真实验验证了方案的有效性。In view of the complex structure, high cost and low efficiency of renewable energy grid connected conversion system, the two-stage converter cannot meet the requirements of the system, and the single-stage structure converter can solve this problem well. There are different topologies in single-stage inverter, such as Z-source inverter and y-source inverter. The new split-source inverter is a kind of inverter which can increase or decrease the AC output voltage flexibly only by using the inverter bridge, and has the advantages over other topologies. It can use the same modulation scheme as the traditional voltage source inverter. Firstly, the three-phase split-source inverter(SSI) was analyzed, and then in the grid connected mode, an improved modulation scheme was proposed to make the output voltage and current waveform more stable;and based on the improved closed-loop control in synchronous rotating coordinate system and the independent control of DC side and AC side, the decoupling control of grid-connected SSI was realized. The simulation and results of the experiment verify the effectiveness of the scheme.

关 键 词：分离源逆变器 Z源逆变器 解耦控制 并网 单级 三相 同步旋转坐标系 

分 类 号：TM464[电气工程—电器]