多晶硅光伏电池的仿真建模及输出特性研究

Simulation Modeling and Output Characteristics of Polysilicon Photovoltaic Cells

根据光伏电池工作原理及输出特性,针对多晶硅电池进行实验研究,得到光伏电池的输出特性曲线,分析光照强度及温度对光伏电池输出特性的影响.结果表明开路电压随辐照度的变化不明显,短路电流则随辐照度的增大而增大,日照强度越强光伏电池的输出功率就越大,反之输出功率就越小.引用光伏电池组件的数学模型,在Simulink环境下建立动态仿真,仿真了不同光照强度和温度条件下的光伏电池的U-I和U-P曲线,进一步分析温度和照度对光伏电池输出特性的影响,结果显示光伏电池的温度对短路电流影响不大,而开路电压随温度的上升而减小.在不同的光照强度下,光伏电池板的P-V曲线的总变化趋势是相似的.仿真结果与实验结果一致.

By employing output characteristics and working principle of photovohaic cells, this research obtains the output curve of photovoltaic cells. It analyzes the impaction of light intensity and temperature on the output characteristics of photovoltaic cells. The result shows that the change of open circuit voltage is not obvious, and the short circuit current increases with the irradiance, and the stronger the sunshine intensity and the greater the output power of photovohaic cells. On the contrary, the less the output power is. Moreover, simulink model of photovoltaic cells is built, and the model simulate the U- I curve and U-Peurve under different temperature and light conditions. This research analyzes the effect temperature and irradiancy on output characteristic of photovohaic cells. It is found that the temperature has little effect on the circuit current, but the open circuit voltage decreases with the increase of temperature. The simulation results are in agreement with the experimental results.