摘要
Abstract
Aiming at the problem that the photovoltaic grid-connected inverter system operates under multiple disturbances,an linear active disturbance rejection control(LADRC)grid-connected strategy combined with photovoltaic system was proposed.Firstly,the dynamic process of PV grid-connected system was analyzed and modeled,and the LADRC-PM structure was designed according to the model characteristics of the photovoltaic system,further improving the speed on the basis of the classical structure.And then,the structure was introduced on the basis of the double closed-loop control framework,so that the system could compensate the disturbance through the feedforward way to enhance the system ability to suppress the uncertainty.Furthermore,the mathematical model of the proposed control strategy was dynamically analyzed using frequency domain analysis method,and its engineering stability,tracking convergence,and disturbance rejection superiority were theoretically verified,and the guidance of adjusting some parameters was given.Finally,the advantages of LADRC-PM control strategy was verified by the Matlab/Simulink simulation in various working conditions.关键词
光伏并网/一阶自抗扰控制/模型分析与结合/多工况暂态测试Key words
photovoltaic grid-connected/first-order active disturbance rejection control(ADRC)/model analysis and combination/multi-condition transient test分类
动力与电气工程
