分布式光伏零输入纹波逆变器及其控制  

Distributed Photovoltaic Inverter with Zero Input Ripple and Control Strategy

作　　者：董增波 贾伯岩 李秉宇 张晨光 DONG Zengbo;JIA Boyan;LI Bingyu;ZHANG Chenguang(State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang 050000,China;Electric Power Research Institute,State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang 050035,China;State Grid Information&Telecommunication Co.,Ltd.,Beijing 102211,China)

机构地区：[1]国网河北省电力有限公司,河北石家庄050000 [2]国网河北省电力有限公司电力科学研究院,河北石家庄050035 [3]国网信息通信产业集团有限公司,北京102211

出　　处：《控制工程》2024年第11期2089-2094,共6页Control Engineering of China

基　　金：国网科技项目(5400-202113150A-0-0-00)。

摘　　要：提出一种适用于分布式光伏的单相两级式反激逆变器,通过在原边侧引入包含纹波吸收电容在内的有源辅助电路,利用有源电路中的开关管对辅助电容进行充放电控制,实现对单相逆变器固有输入低频脉动功率的吸收与转移,有效抑制源侧输入低频电流纹波,提升了光伏电池使用寿命与系统可靠性。详细阐述了所提新型逆变器拓扑结构及其工作原理、系统各环节的控制方案设计与实现方法。通过构建MATLAB系统仿真模型以及单相两级式逆变器实验样机,共同证明了理论分析的正确性。A single-phase two-stage flyback inverter for distributed PV is proposed.By introducing an active auxiliary circuit including ripple absorbing capacitor in the primary side and using the power switch in the active circuit to charge and discharge the auxiliary capacitor,so as to realize the absorption and transfer of the inherent input low-frequency pulsating power of the single-phase inverter.Then the low-frequency input current ripple of the source side is eliminated,and the service life and system reliability of the photovoltaic cell are improved.The topology structure,working principle,scheme design and control strategy of the proposed new inverter are described in detail.A prototype of single-phase two-stage inverter is set up in the laboratory.The experimental results prove the correctness of the theoretical analysis.

关 键 词：零输入电流纹波 两级式逆变器 控制策略 拓扑分析 

分 类 号：TM76[电气工程—电力系统及自动化]