基于模糊控制的光伏并网逆变器MPPT控制研究

最大功率点跟踪控制的目的是为了将光伏阵列发出的最大能量实时地提供给负载,使光伏发电系统的能量利用率达到最大。在光伏阵列产生电能的应用中,有许多不确定因素,如太阳光照强度、光伏阵列温度的变化、负载的变化、光伏阵列输出特性的非线性,则建立模型分析光伏阵列输出最大功率要考虑很多的因素。从模糊控制技术的分析中知道,模糊控制不需要对被控对象建立精确的数学模型,是一种相对简单的智能控制方法,对处理非线性问题有很好的效果。因此,用模糊控制法来实现MPPT可以得到比较好的效果。本文基于此研究了光伏阵列的非线性功率输出特性,建立了基于Matlab simulink/Power system的光伏阵列仿真模型,对基于模糊控制采用扰动观察法进行光伏发电最大功率点跟踪进行了仿真验证。

Based on fuzzy control PV grid-connected inverter MPPT control research

The purpose of the maximum power point tracking control is to be the largest photovoltaic array emitted energy to the load in real time, so that the energy efficiency of photovoltaic power generation system to achieve the highest. In the application of the PV array to generate electricity, there are many uncertain factors, such as sunlight intensity, the PV array temperature changes, changes in non-linear loads, photovoltaic array output characteristics, the model analyzes the maximum power output of the PV array to consider many factors. In the analysis of fuzzy control technology know, fuzzy control does not require the controlled object to construct an accurate mathematical model is a relatively simple intelligent control method for nonlinear problems with very good results. Thus, the fuzzy control method to achieve MPPT can get better results. Based on this study, the non- linear power output characteristics of the PV array, the establishment of a Mattab simulink/ Power system PV array simulation model based on fuzzy control using perturbation and observation method photovoltaic maximum power point tracking simulation verification.