A robust model-free controller for a three-phase grid-connected photovoltaic system based on ultra-local model  

作　　者：Ahsene Boubakir Sid-Ahmed Touil Salim Labiod Nasserdine Boudjerda 

机构地区：[1]LAJ,Faculty of Science and Technology,University of Jijel,BP.98,Ouled Aissa,18000,Jijel,Algeria [2]Department of Electrical Engineering,University of Jijel,Jijel,Algeria [3]LER,Faculty of Sciences and Technology,University of Jijel,BP 98,Ouled Aissa,18000,Jijel,Algeria

出　　处：《Protection and Control of Modern Power Systems》2021年第1期538-550,共13页现代电力系统保护与控制（英文）

摘　　要：In this paper, a robust model-free controller for a grid-connected photovoltaic (PV) system is designed. The system consists of a PV generator connected to a three-phase grid by a DC/AC converter. The control objectives of the overall system are to extract maximum power from the PV source, to control reactive power exchange and to improve the quality of the current injected into the grid. The model-free control technique is based on the use of an ultra-local model instead of the dynamic model of the overall system. The local model is continuously updated based on a numerical differentiator using only the input–output behavior of the controlled system. The model-free controller consists of a classical feedback controller and a compensator for the effects of internal parameter changes and external disturbances. Simulation results illustrate the efficiency of the controller for grid-connected PV systems.

关 键 词：Photovoltaic system Maximum power point Model-free control Ultra-local model Numerical differentiator 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]