光伏电池建模及变步长MPPT控制

Modeling of Photovoltaic Cells and MPPT Control Algorithm with Variable Step

针对大环境下的能源短缺与环境污染问题,提出了一种常见新型能源光伏电池(PV)的建模方法。分析了常见的光伏电池MPPT算法,在此基础上对扰动观察法进行了改进,克服了传统扰动观察法在距离最大功率点远近各有限制的缺点。利用Matlab/Simulink仿真平台搭建了光伏电池的数学模型,并根据改进的MPPT算法搭建了控制电路。结果表明,该数学模型可以很好地模拟实际光伏电池的工作特性,改进算法较好地弥补了传统算法的不足,可实现最大功率点跟踪。

According to the problem of energy shortage and environmental pollution in large environment, a new modeling method of the new energy photovoltaic cell is proposed. Analyzing the common MPPT algorithm of photovoltaic cells, the disturbance observation method is improved on the basis of the analysis, which overcomes the shortcomings of traditional disturbance observation at a distance of maximum power point . Using Matlab / Simulink simulation platform to build a mathematical model of photovoltaic cells, and the control circuit is built according to the improved MPPT algorithm. The results show that the mathematical model can simulate the actual working characteristics of photovoltaic cells well, and the improved algorithm can make up for the deficiency of the traditional algorithm, which can realize the maximum power point tracking.