光伏发电系统的MPPT方法研究

在matlab/simulink环境中,根据太阳能电池板的物理机制建立了光伏阵列的仿真模型。针对固定占空比法的不足提出了自适应占空比法,简化了Boost电路仿真模型然后通过S函数建立了最大功率跟踪的动态仿真模型,得出了两种方法的对比仿真波形。用DSP搭建了试验平台,得到了这两种方法跟踪所用时间。结果表明,自适应占空比法具有很好的动态和稳态性能,能够更好的实现最大功率跟踪。

The Research of MPPT Method of the Photovoltaic Power System

According to the physical mechanism of photovoltaic battery, a photovoltaic energy system model is designed in matlab/simulink environment.A adaptive duty cycle method is provided for the shortage of the fixed duty cycle method. The Boost circuit model is simplified. A dynamic simulation models, which provids a comparative simulation waveform of the two methods, based on S-Function is designed. The tracing time is got through the test platform based on DSP. The result shows that adaptive duty cycle method has a good perfomance in dynamic and static process, and it can achieve maximum power point tracking perfectly.