摘要
为了解决当前各类算法对光照强度快速变化和光伏系统局部遮光时最大功率点的跟踪不准确的问题,提出了一种全新的、高性能跟踪方法。首先,对所提方法的跟踪原理进行了分析,从模型结构、扫描过程、占空比计算、触发条件等方面展开了论述,从理论上分析了所提出的方法能准确跟踪全局的最大值;其次,利用仿真软件将提出的跟踪方法与现阶段应用较为成熟的扰动观测法、电导增量法两种方法进行了对比,对光照强度快速变化、局部遮光两种工况进行了仿真,仿真结果表明此方法明显优于另外两种方法;最后,搭建了试验平台,开展光照强度快速变化、局部遮光时系统最大功率点跟踪试验,试验结果再次证实本文提出的方法在跟踪时间和跟踪效率上均优于另外两种方法。
In order to solve the problem of inaccurate tracking of the maximum power point of the current various algorithms for rapid changes in light intensity and partial shading of the photovoltaic system,a new and high-performance tracking method was proposed.Firstly,the tracking principle of the proposed method was analyzed,and the discussion was carried out from the aspects of model structure,scanning process,duty cycle calculation,trigger conditions,etc.,and theoretically analyzed that the proposed method can accurately track the global maximum value.Secondly,using simulation software,the proposed tracking method was compared with the current application of the more mature disturbance observation method and the conductance increment method.The two conditions of rapid light intensity change and partial shading were simulated,and the simulation results shows that this method is significantly better than the other two methods.Finally,a test platform was built to carry out the tracking test of the maximum power point of the system when the light intensity changes rapidly and partial shading.The test results again confirmed that the method proposed in this paper is both in tracking time and tracking efficiency.Better than the other two methods.
作者
全少理
朴哲勇
陈鹏浩
王静
孙义豪
刘文霞
李海燕
杨艳会
富梦迪
QUAN Shao-li;PIAO Zhe-yong;CHEN Peng-hao;WANG Jing;SUN Yi-hao;LIU Wen-xia;LI Hai-yan;YANG Yan-hui;FU Meng-di(State Grid Henan Electric Power Company Economic and Technical Research Institute, Zhengzhou 450052, China;State Key Laboratory of New Energy Power System, North China Electric Power University, Beijing 102206, China;State Grid Jilin Electric Power Co., Ltd., Changchun 132000, China;State Grid Henan Electric Power Company, Zhengzhou 450000, China)
出处
《哈尔滨理工大学学报》
CAS
北大核心
2020年第6期53-62,共10页
Journal of Harbin University of Science and Technology
基金
北京市自然科学基金(3202032).
关键词
最大功率点跟踪
光电板特性
局部遮光
跟踪效率
maximum power point tracking
photovoltaic panel characteristics
partial shading
tracking efficiency
