摘要
长时间遮挡会导致光伏板光电转换受到影响,产生热斑,对应光伏阵列的输出U-I曲线随之会发生变化,相应的U-P曲线也会包含多个峰值。为了准确定位热斑,需要分析热斑产生的机理,构建具有通用性的阴影遮挡下光伏阵列模型,针对传统工程模型不能准确描述诸如CTCT等复杂光伏阵列的电气参数,本文提出一种阴影遮挡下的多点平抛运动的光伏阵列数学模型。为验证该模型的准确性,采用Matlab/Simulink建模仿真并搭建热斑模拟平台,改变光照强度模拟阴影遮挡以及光伏板的连接方式,得到并分析光伏阵列U-I、U-P特性曲线,相比于工程模型,本文所提出的模型使运算时间降低到2.5%,其能更全面地描述局部阴影条件下复杂结构的光伏阵列的输出特性。
Long-term shielding will affect photovoltaic panel photoelectric conversion and produce hot spots,and the output U-I curve of the corresponding photovoltaic array will also change,and the corresponding U-P curve will contain multiple peaks.In order to accurately locate hot spots,it is necessary to analyze the mechanism of hot spots generation and build a universal pv array model with shadow occlusion.In view of the traditional engineering model cannot accurately describe the electrical parameters of complex PV array such as CTCT,this paper proposes a multi-point flat throw motion pv array mathematical model with shadow occlusion.In order to verify the accuracy of the model,Matlab/Simulink modeling and simulation was used to build a hot spot simulation platform,and the light intensity was changed to simulate shadow occlusion and the connection mode of photovoltaic panels.The U-I and U-P characteristic curves of photovoltaic array were obtained and analyzed,compared with the engineering model,the proposed model reduces the operation time to 2.5%,and can describe the output characteristics of the complex photovoltaic array under local shadow more comprehensively.
作者
陈功
王䶮
强浩
Chen Gong;Wang Yan;Qiang Hao(School of Mechanical Engineering and Rail Transit,Changzhou University,Changzhou 213164,China;School of Electrical and Information Engineering,Changzhou Institute of Technology,Changzhou 213032,China)
出处
《电子测量技术》
北大核心
2022年第24期91-97,共7页
Electronic Measurement Technology
基金
江苏高校文化创意协同创新中心研究课题(XYN1805)
南昌航空大学无损检测技术教育部重点实验室开放基金(EW201980089)
教育部产学合作协同育人项目(20192156019,201902156031)资助
关键词
热斑
阴影遮挡模型
平抛运动
光伏阵列
hot spot
shadow occlusion model
horizontal projectile motion
photovoltaic array
作者简介
陈功,博士,副教授,主要研究方向为光伏热斑检测。E-mail:realchengong@sina.com;王䶮,硕士研究生,主要研究方向为新能源技术与装备。E-mail:1402058950@qq.com;通信作者:强浩,博士,副教授,主要研究方向为新能源发电、电力电子。E-mail:qhao@cczu.edu.cn
