Tracking the maximum power point of solar panels through direct estimation of optimum voltage with temperature  

作　　者：Mohammed El Bachir Ghribi Luis Garcia-Gutierrez Zine Eddine Touhami Ternifi Zhixue Zheng Ghalem Bachir Michel Aillerie 

机构地区：[1]Applied Power Electronics Laboratory(LEPA),University of Science and Technology of Oran Mohamed Boudiaf,Oran,Algeria [2]Laboratoire Matériaux Optiques,Photonique et Systèmes(LMOPS),Universitéde Lorraine,CentraleSupélec,F-57000 Metz,France [3]Laboratory of Sustainable Development of the Electrical Energy(LDDEE),University of Science and Technology of Oran Mohamed Boudiaf,Oran,Algeria

出　　处：《Clean Energy》2024年第4期135-146,共12页清洁能源（英文）

基　　金：supported by the Algerian Ministry of Higher Education and Scientific Research under grant number 06/ETT-LMD/FGE/USTO-mb/23;the Agence Nationale de la Recherche(ANR)under grant no.ANR-19-CE22-008.

摘　　要：Electricity production from photovoltaic(PV)panels is maximized when the operating point is located at the maximum power point thanks to dedicated controllers.These controllers are driven to track the maximum power by using various algorithms within distributed or centralized architectures accounting for factors such as partial irradiation and temperature changes.The effect of irradiance on the optimal panel voltage is weak or even negligible,while it is strong and quasi-linear-dependent on temperature.Based on this observation,this article introduces a straightforward method for tracking the maximum power of a PV panel by using an optimizer,focusing solely on its temperature response as an input variable.The proposed approach hinges on linearizing the relationship between panel temperature and operating voltage.This relationship enables the estimation of the maximum power point through temperature measurement alone.Thus,after determination of the linear temperature coefficient of the voltage requiring only the knowledge of two optimal voltages at different temperatures,for example from the datasheet of the panel,the power tracking involves only one temperature sensor placed on the panel alongside a voltage sensor for regulation.The principle,modelling,and validation post-panel ageing of the method are detailed in this paper.Simulation,conducted using real experimental irradiation and temperature data,attests to the effectiveness of the control.Results indicate an average effectiveness of the method of>99.1%in tracking the maximum power,with the panel generating 2.33 kWh out of a possible 2.35 kWh.This performance is comparable to that of tracking devices employing more complex algorithms.The simplicity and efficiency of the method make it a promising option for maximizing the power production at low cost from PV systems in small or residential,on-or off-grid connected applications.

关 键 词：PHOTOVOLTAIC maximum power point tracking HYSTERESIS efficiency 

分 类 号：TM914.4[电气工程—电力电子与电力传动]