西南交通大学学报2024，Vol.59Issue(6)：1266-1274,9.DOI:10.3969/j.issn.0258-2724.20220863
光伏发电系统的改进型快速GMPPT算法
Improved and Fast Global Maximum Power Point Tracking Algorithm of Photovoltaic Power Generation System
摘要
Abstract
In order to improve the energy utilization of photovoltaic(PV)power generation under partial shading conditions(PSCs),an improved and fast global maximum power point tracking(GMPPT)algorithm was proposed.Firstly,the output characteristics of PV array under PSCs were researched,and the output curve of PV array was divided into constant current region(CCR)and constant voltage region(CVR)according to the relationship between knee point and open circuit voltage.Then,the operation principles of the traditional maximum power trapezium(MPT)algorithm and the improved and fast GMPPT algorithm were analyzed.The improved and fast GMPPT algorithm is based on the MPT algorithm,where the search interval is limited by dynamic upper and lower limits of voltage,and CCR with a long adjustment time was skipped to further improve the tracking speed.Finally,the effectiveness of the proposed algorithm was verified by simulation and experiment.The experimental results reveal that the minimum tracking time of the improved and fast GMPPT algorithm is 4.0 s,and the scanning voltage and the energy loss of the proposed algorithm are 17.34 V and 98.19 J,respectively.Compared with the traditional global scanning algorithm and the MPT algorithm,the proposed algorithm decreases tracking time by 68.25%and 68.00%,lowers scanning voltage by 74.86%and 75.63%,and reduces energy loss by 58.19%and 62.31%,respectively.关键词
最大功率点跟踪器/恒流区/调整时间/光伏发电系统/全局优化Key words
maximum power point tracker/constant current region/adjustment time/photovoltaic power generation system/global optimization分类
动力与电气工程引用本文复制引用
周国华,薛宁,毕强..光伏发电系统的改进型快速GMPPT算法[J].西南交通大学学报,2024,59(6):1266-1274,9.基金项目
国家自然科学基金项目(62271417,61771405) （62271417,61771405）
