发电技术2025，Vol.46Issue(2)：409-420,12.DOI:10.12096/j.2096-4528.pgt.24132
基于改进模糊线性自抗扰的LCL型并网逆变器控制策略
LCL Grid-Connected Inverters Control Strategy Based on Improved Fuzzy Linear Active Disturbance Rejection Control
摘要
Abstract
[Objectives]In complex grid environments,traditional control methods for LCL grid-connected inverter systems suffer from poor grid current quality,inadequate dynamic performance,and inherent resonance peaks.To address these issues,a Fuzzy linear active disturbance rejection control(Fuzzy-LADRC)strategy is proposed.[Methods]The disturbance rejection capability is enhanced by modifying the error equation of the traditional linear extended state observer.The modified error equation is then combined with fuzzy logic control to achieve adaptive control of the controller parameters.The improved Fuzzy-LADRC strategy is applied to both the phase-locked loop and the current loop of the LCL control system.The system's stability and disturbance rejection performance are verified by using Lyapunov stability analysis and frequency-domain analysis.Finally,MATLAB/Simulink simulations are conducted to validate the effectiveness of the proposed control strategy.[Results]The improved Fuzzy-LADRC strategy shows superior performance in terms of grid current harmonic distortion,offset,and dynamic response time under three different operating conditions compared with other control methods.Additionally,this control strategy simplifies the control structure by eliminating the need for additional damping components.[Conclusions]The improved Fuzzy-LADRC strategy effectively improves the system's disturbance rejection capability and grid current quality while reducing system costs and achieving good dynamic performance.It provides a new approach for the control of LCL grid-connected inverters.关键词
电网/自抗扰控制/并网逆变器/模糊控制/控制策略/稳定性/谐波/畸变率Key words
power grid/active disturbance rejection control/grid-connected inverter/fuzzy control/control strategy/stability/harmonics/distortion rate分类
能源科技引用本文复制引用
李航,郭昆丽,杨鹏,吕家君,任蓓蕾,曲晨明,朱婷华,郝翊帆..基于改进模糊线性自抗扰的LCL型并网逆变器控制策略[J].发电技术,2025,46(2):409-420,12.基金项目
国家自然科学基金项目(52407137) （52407137）
陕西省自然科学基础研究计划项目(2023-JC-QN-0391).Project Supported by National Natural Science Foundation of China(52407137) （2023-JC-QN-0391）
Natural Science Basic Research Program of Shaanxi Province(2023-JC-QN-0391). （2023-JC-QN-0391）
