基于SVM改进扰动法的MPPT研究

MPPT study of perturbation method based on modified SVM

光伏发电凭借其开发简单、安装维护方便等优势,得到了广泛的应用,在众多新能源发电中占据着重要的地位。但是该技术存在输出功率不稳定、光能-电能转换率比较低等因素,在很大程度上遏制着光伏发电的进一步发展。为了提高光伏发电技术的光电转换率和稳定其功率输出,在分析光伏发电的模型和最大功率点跟踪(MPPT)技术的基础上,提出一种改进的控制方法,并利用Simulink仿真软件对该控制方法下的光伏发电系统进行仿真分析,通过仿真得出的最大功率点跟踪曲线证明提出的改进控制方法可以在很大程度上减少扰动次数和跟踪时间,有效地提高最大功率点的跟踪精度和速度。

The development of photovoltaic power generation with its simple, convenient installation and maintenance and other advantages, was widely used, and played an important role in a number of new energy power generation.But unstable power output and low light-electricity conversion rate were existed. The further development of photovoltaic power generation was greatly restricted. In order to improve the photoelectric conversion rate and stabilize the output power of photovoltaic power generation, in the analysis of the model and the maximum power point tracking（MPPT） technology, an improved control method was proposed, and the simulation and analysis was carried out using the Simulink simulation software of photovoltaic power generation system on the control methods.The maximum power point simulation result shows that the improved tracking curves show that the number of disturbance and tracking of time can be reduced to a great extent, and the maximum power point tracking accuracy and speed could be effectively improved.