两级式光伏并网逆变器控制方法研究  

Research on Control Method of Double-Stage Photovoltaic Grid-Connected Inverter

作　　者：李洋 褚洪川 王津瑶 刘文刚 尹孝祖 LI Yang;CHU Hongchuan;WANG Jinyao;LIU Wengang;YIN Xiaozu(State Grid Dalian Power Supply Company,Dalian,Liaoning 116001,China)

机构地区：[1]国网大连供电公司,辽宁大连116001

出　　处：《东北电力技术》2025年第2期8-14,共7页Northeast Electric Power Technology

摘　　要：针对两级式光伏并网逆变器的拓扑结构,设计一种基于双闭环控制的控制方法。系统前级实现光伏最大功率点跟踪控制,后级控制直流母线电压稳定,同时实现交流并网。该控制方法可较好地兼顾光伏最大功率点跟踪效果、并网逆变器动态特性和系统的稳定性。首先,对光伏并网逆变器系统的研究加以总结分析,阐述两级式光伏并网逆变器系统的结构特点。然后,分别对此系统的MPPT控制方法、并网控制方法及逆变器控制器设计进行说明和分析。最后,在PLECS仿真软件中搭建系统仿真模型,仿真验证该设计的两级式光伏并网逆变器控制方法的正确性和有效性。According to the topology of double-stage photovoltaic grid-connected inverter,a control method based on double closed-loop control is designed.The front stage of the system realizes the photovoltaic maximum power point tracing(MPPT)control.Back stage controls DC bus voltage stability,while AC grid connection.This control method can better take into account the photovoltaic MPPT effect,the dynamic characteristics of the grid-connected inverter and the stability of the system.Firstly,it summarizes and ana-lyzes the research of the photovoltaic grid-connected inverter,and expounds the structural characteristics of the two-stage photovoltaic grid-connected inverter.Then,it respectively explains and analyzes the MPPT control method,grid-connected control method and in-verter controller design of this system.Finally,it builts a system simulation model in the PLECS simulation software,and the simula-tion verifies the correctness and effectiveness of the double-stage photovoltaic grid-connected inverter control method designed.

关 键 词：光伏发电 最大功率点跟踪 并网逆变器 

分 类 号：TM61[电气工程—电力系统及自动化]