单相并网逆变器的改进ICF控制策略研究  

Research on Improved ICF Control Strategy for Single-phase Grid-connected Inverters

作　　者：张哲 宋欣雨 宋佳 任庆峰 ZHANG Zhe;SONG Xin-yu;SONG Jia;REN Qing-feng(State Grid Beijing Pinggu Power Supply Company,Bejing 101200,China;不详)

机构地区：[1]国网北京平谷供电公司,北京101200 [2]东北电力大学,电气工程学院,吉林吉林132011

出　　处：《电力电子技术》2024年第7期9-12,共4页Power Electronics

基　　金：国家重点研发计划(2021YFC1993001);国网北京市电力公司科技项目(52025520100K)。

摘　　要：针对单相LCL型并网逆变器逆变侧电流反馈(ICF)控制方法在非理想电网电压下网侧电流质量差的问题,提出带电容电流前馈和电容电流有源阻尼的改进ICF控制策略,并用比例多谐振控制器构建逆变侧电流控制环路,以实现电流基波的无差跟踪和网侧低次谐波电流抑制。首先理论分析了并网逆变器的数学模型。其次,介绍改进型ICF控制方法,并详细分析电容电流反馈有源阻尼系数和比例多谐振控制器参数设计。最后,针对5 kW单相LCL型逆变器平台,进行仿真和实验验证,结果证明了所提控制策略的有效性。The inverter side current feedback(ICF)control method of single-phase LCL type grid-connected inverter has poor grid connected current quality under non ideal grid voltage.An improved ICF control strategy with capacitive cur-rent feedforward and active damping of capacitive current is proposed,and the inverter side current control loop con-structed by proportional and multi-resonant controllers to achieve accurate tracking of current fundamental waves and suppression of low order harmonic currents on the grid side.Firstly,the mathematical model of grid connected invert-ers is theoretically analyzed.Secondly,the improved ICF control method is introduced,and the active damping coeffi-cient of capacitive current feedback and the parameter design of proportional and multi-resonant controller are ana-lyzed.Finally,simulation and experimental verification are conducted on a 5 kW single-phase LCL inverter platform,and the results proved the effectiveness of the proposed control strategy.

关 键 词：逆变器 逆变侧电流反馈控制 比例多谐振控制器 

分 类 号：TM464[电气工程—电器]