建筑用光伏组件晶体硅电池疲劳损伤演化模型

MODELING OF FATIGUE DAMAGE EVOLUTION OF CRYSTALLINE CELL IN PHOTOVOLTAIC MODULE APPLIED ON BUILDINGS

基于损伤力学理论,针对光伏组件的结构特点,建立在等幅循环荷载作用下光伏组件晶体硅电池的疲劳损伤演化模型,并与实验结果进行比较,结果表明,该模型能较好地描述组件电池片的损伤演化,即:损伤的累积是非线性的,在循环荷载作用初期电池片的损伤有一个快速发展过程,随着循环次数的增加,损伤的增速变缓。

In application of the building attached photovoltaic （PV） in China, the modules with 3.2 mm glass panel are the popular configuration. In some applications the wind load applied on the modules varies in magnitude and the fatigue damage will evolve in cells and, as result, the power loss can be observed. In this paper, a model based on the damage mechanics to discribe the evolution of fatigue damage of the crystalline cell in photovoltaic module was developed and then applied to simulate the experiment results. The simulation successfully captures the main features of fatigue damage evolution in the crystalline cell, i.e. , the damage accumulation in cell is non-linear for the mudule under cyclic load, the evolution of the fatigue damage is fast initially and slow down with increasing cycles.