光伏发电系统的MATLAB设计与仿真

Design for Photovoltaic Power Generation System Based on MATLAB

随着传统化石能源的逐渐枯竭,现今太阳能光伏发电成为热点,太阳能光伏发电的效率转换成为了利用太阳能的关键问题。针对如何提高太阳能光伏发电的效率问题,设计了一个光伏发电的仿真系统。在对太阳能光伏电池进行数学分析的基础上建立了数学模型,通过MATLAB仿真分析了太阳能电池的输出电压和输出功率的变化规律,在常用的电导增量法上进行改进,达到简化算法和优化控制效果的目的。根据建立的数学模型及电压功率的变化规律,以改进的电导增量法为基础,提出了基于Boost电路的最大功率点跟踪策略,并在MATLAB中搭建了系统模型进行仿真,仿真结果表明,改进的电导增量法有抖动,但就整体性能和效率而言,较常用的电导增量法算法更为简单,控制效果更好,因此,这一策略能更好地实现最大功率点跟踪。

With the gradual depletion of traditional fossil fuels,nowadays,photovoltaic power generation system has become a hot spot.The efficiency conversion of solar photovoltaic power generation has become a key issue of solar energy.According to the problem of improving the solar photovoltaic power generation efficiency,this paper designed a photovoltaic power generation simulation system.Through the mathematical analysis of solar photovoltaic cells,this paper built the mathematical model and used MATLAB to simulate and analyze the rule of voltage and power of the solar cell.In order to achieve algorithm simplification and better control effect,this paper improved the general conductance increment method.According to the mathematical model and voltage and power variation rule,on the basis of the improved conductance incremental method,this paper proposed a maximum power point tracking strategy based on Boost circuit,and build a system model in MATLAB simulation.According to the simulation results,there is some jitter of the improved conductance incremental method,but to the whole function and efficiency,this strategy can realize the maximum power point tracking better than the general conductance increment method.