一种新型模块化三相光伏逆变器及其分布式控制策略  

Novel Modular Three-phase Photovoltaic Inverter and Its Distributed Control Strategy

作　　者：党兴华 潘尚智 葛晓露 宫金武[1] 郝利东 查晓明[1] DANG Xinghua;PAN Shangzhi;GE Xiaolu;GONG Jinwu;HAO Lidong;ZHA Xiaoming(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学电气与自动化学院,武汉430072

出　　处：《电源学报》2024年第6期100-109,共10页Journal of Power Supply

基　　金：湖北省重点研发计划资助项目(2020BHB002)。

摘　　要：级联H桥被认为是最适合光伏发电场景的拓扑之一。针对传统三相级联H桥光伏逆变器电容体积大、寿命短、相间功率失配及控制通信系统复杂的问题,基于磁通抵消原理提出1种新型模块化三相光伏逆变器及其分布式控制策略。首先,介绍了模块化拓扑的基本结构;然后,对磁通抵消功率解耦的基本原理及二倍频电压纹波的影响因素进行了详细分析,提出1种分布式控制策略以实现二倍频电压纹波的抑制并保证三相输出功率平衡;最后,通过仿真与实验验证了分析的正确性与控制策略的可行性。The cascaded H-bridge is considered as one of the most suitable topologies for photovoltaic(PV)power generation.Aimed at the problems of the traditional three-phase cascaded H-bridge PV inverter such as a large capacitor volume,a short service life,inter-phase power mismatch and a complex control communication system,a novel modular three-phase PV inverter and its distributed control strategy are proposed based on the principle of magnetic flux cancellation.First,the basic structure of the proposed modular topology is introduced.Then,the basic principle of magnetic flux cancellation power decoupling and the influencing factors of double-line frequency voltage ripple are analyzed in detail,and a distributed control strategy is proposed to suppress the double-line frequency voltage ripple and ensure the balance of three-phase output power.Finally,the correctness of theoretical analysis and the feasibility of the proposed control strategy were verified by simulation and experimental results.

关 键 词：光伏级联H桥 功率失配 多端口变换器 功率解耦 分布式控制 

分 类 号：TM464[电气工程—电器]