电力系统保护与控制2025，Vol.53Issue(9)：82-92,11.DOI:10.19783/j.cnki.pspc.240912
基于改进LADRC-PI双闭环控制的单相光伏逆变器控制策略研究
Research on control strategy of single-phase photovoltaic inverter based on improved LADRC-PI dual closed-loop control
摘要
Abstract
In the field of photovoltaic(PV)power generation control,inverter control plays a crucial role.In dual-loop control strategies,linear control methods such as proportional-integral(PI)control are widely used in the outer voltage loop and inner current loop.However,traditional PI and other linear control methods do not consider the nonlinear characteristics of PV inverter systems,resulting in poor dynamic and static performance and robustness.This paper proposes a dual-loop control strategy combining an improved linear active disturbance rejection controller(LADRC)with PI control.To avoid oscillations in the PV inverter system and improve system stability,an improved LADRC is designed by adding an output error compensation term to the linear state error feedback control law,and is applied to the outer voltage loop,while PI control is used in the inner current loop.After parameter tuning and controller performance analysis,it realizes the control on a 1.2 kW single-phase PV inverter system.The system is modelled and simulated in Matlab/Simulink to analyze the influence of the improved LADRC-PI control strategy on single-phase photovoltaic inverter performance.Simulation results show that compared with the traditional dual-loop PI control,the improved LADRC-PI dual-loop control has better system stability,faster response speed,and the improved dynamic and static performance and robustness.关键词
光伏逆变器/线性自抗扰控制器/线性状态误差反馈律/超调量/系统响应Key words
photovoltaic inverter/LADRC/LSEF/overshoot/system response引用本文复制引用
刘道生,宋忠文,熊世豪,王仕会..基于改进LADRC-PI双闭环控制的单相光伏逆变器控制策略研究[J].电力系统保护与控制,2025,53(9):82-92,11.基金项目
国家自然科学基金项目资助(52167017) （52167017）
江西省自然科学基金项目资助(20224BAB204054) （20224BAB204054）
赣鄱俊才支持计划-主要学科学术和技术带头人培养项目—领军人才(学术类)(20232BCJ22006)This work is supported by the National Natural Science Foundation of China(No.52167017). （学术类）
