摘要
针对静态阴影下光伏阵列模型输出特性与实际运行输出特性偏差较大的问题,建立基于动态阴影的光伏阵列模型。首先对由带旁路二极管光伏组件组成的光伏阵列进行配置结构优化;然后根据局部阴影下光伏阵列的光照强度及温度随时间正态分布的特性,利用变步长Guass-Legendre积分算法,得到光照强度及温度动态分布的值,通过此动态值实时调节光伏阵列优化模型的输出状态,解决静态阴影下光伏阵列模型难以满足实时输出要求的问题。仿真结果表明:该模型适用于不同阴影条件、不同功率等级要求的应用场合。与静态阴影下光伏阵列的输出特性相比,光伏阵列动态模型的输出特性更加接近于无阴影条件下光伏阵列的输出。
In view of the problem of large deviation between the output characteristics of the photovoltaic array model and the actual operation under static shading,a photovoltaic array model is established based on dynamic shading. Firstly,the configuration of the photovoltaic array composed of photovoltaic modules with bypass diodes is optimized. Then according to the characteristics of normal distribution with time of the photovoltaic array’s insolation and temperature under partial shading,the values of dynamic distribution of the insolation and temperature are obtained which relies on utilizing the quadrature algorithm of variable-step Guass-Legendre. Through the dynamic values,the output state of the photovoltaic array optimization model is adjusted with real time,which solves the problem that the photovoltaic array model can not fulfil the requirement of real-time output under static shading. The simulation results show that the modelis suitable for the application situations with different shading conditions and different power levels. Compared with the output characteristics of photovoltaic array under static shading,the output characteristics of dynamic model of photovoltaic array are closer to the output characteristics of photovoltaic array without shading.
作者
裴婷婷
郝晓弘
Pei Tingting;Hao Xiaohong(College of Electrical and Information Engineering/Key Laboratory of Gansu Advanced Control for Industrial Processes/National Demonstration Center for Experimental Electrical and Control Engineering Education,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第2期268-274,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(61540033)。
关键词
动态模型
光伏阵列
光伏组件
局部阴影
配置结构优化
dynamic model
photovoltaic array
photovoltaic modules
partial shading
configuration optimization
