光伏逆变器Boost 电路线性自抗扰控制  

Linear Active Disturbance Rejection Control of Photovoltaic Inverter Boost Circuit

作　　者：曾江[1] 刘佩 叶康权 ZENG Jiang;LIU Pei;YE Kang-quan(School of Electric Power Engineering,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学,电力学院,广东广州510641

出　　处：《电力电子技术》2025年第4期44-47,82,共5页Power Electronics

基　　金：广东省自然科学基金(2021A1515012616)。

摘　　要：针对光伏逆变器运行在PV曲线左侧时,Boost电路发生谐振的问题,构造线性自抗扰控制器(LADRC)控制Boost电路。为了提高LADRC在低采样频率下的稳定性,本文提出一种改进线性扩张状态观测器(LESO)离散化算法。通过劳斯判据证明该算法在本文的控制参数下比传统LESO离散化算法更稳定。仿真结果表明,当光伏逆变器运行在PV曲线左侧时,所提改进LESO离散化的LADRC算法比传统PI控制有更好的稳态和暂态性能,其控制带宽能突破系统谐振频率的限制。Aiming at the problem that the Boost circuit resonates when the photovoltaic inverter runs on the left side of the PV curve,a linear active disturbance rejection controller(LADRC)is constructed to control the Boost circuit.In order to improve the stability of LADRC at low sampling frequency,an improved linear extended state observer(LESO)discretization algorithm is proposed.The Routh criterion proves that the proposed algorithm is more stable than the traditional discrete LESO under the control parameters.The simulation results show that when the photovoltaic inverter runs on the left side of the PV curve,the proposed improved LESO discretization LADRC algorithm has better steady-state and transient performance than traditional PI control,and its control bandwidth can break through the limitation of system resonance frequency.

关 键 词：光伏逆变器 线性自抗扰控制 线性扩张状态观测器 

分 类 号：TM464[电气工程—电器]