LCL并网逆变器的自抗扰控制设计与仿真  

DESIGN AND SIMULATION OF ACTIVE DISTURBANCE REJECTION CONTROL FOR LCL GRID-CONNECTED INVERTER

作　　者：周雪松 尹杰 马幼捷 魏聪聪 刘佳风 温洪宇 Zhou Xuesong;Yin Jie;Ma Youjie;Wei Congcong;Liu Jiafeng;Wen Hongyu(College of Electrical and Electronic Engineering,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学电气电子工程学院,天津300384

出　　处：《计算机应用与软件》2024年第10期51-57,76,共8页Computer Applications and Software

基　　金：国家自然科学基金面上项目(51877152)。

摘　　要：并网系统是一个强不确定性和非线性的复杂系统,其控制方式直接影响并网系统能否安全、稳定、高质量运行。因此,基于LCL并网逆变器数学模型,设计一种三阶自抗扰电流控制器,通过四阶线性扩张状态观测器对系统的不确定性及扰动进行观测补偿,将被控对象还原为标准积分串联型。使用频率响应法详细分析系统的跟踪性和抗扰性,并通过李雅普诺夫稳定性判据证明了闭环系统是渐进稳定的。最后,搭建MATLAB仿真平台验证控制策略的有效性,结果表明,所设计的电流控制策略提高了并网电流质量、系统的鲁棒性和控制品质。The grid-connected system is a complex system with strong uncertainty and nonlinearity,and its control method directly affects whether the grid-connected system can operate safely,stably and with high quality.Therefore,based on the mathematical model of the LCL grid-connected inverter,a third-order active disturbance rejection current controller is designed.The uncertainty and disturbance of the system were observed and compensated by the fourth-order linear extended state observer,and the controlled object was restored to the standard integral series type.The frequency response method was used to analyze the tracking performance and immunity of the system in detail,and the Lyapunov stability criterion proved that the closed-loop system was progressively stable.MATLAB simulation platform was built to verify the effectiveness of the control strategy.The results show that the designed current control strategy improves the grid-connected current quality,system robustness and control quality.

关 键 词：LCL并网逆变器 线性自抗扰控制 线性扩张状态观测器 电流控制 扰动补偿 稳定性证明 

分 类 号：TM464[电气工程—电器] TP3[自动化与计算机技术—计算机科学与技术]