光伏电池MPPT控制技术研究

Research on MPPT Control Technology of Photovoltaic Cells

随着世界上各个国家开始倡议发展清洁能源,在市场需求等因素促进作用下,光伏发电规模不断扩大并取得了良好的效果。相比于风力发电,光伏发电结构灵活、安装方便而且可以实现无噪声运行。相比于水利发电,光伏发电对地理环境的要求更低,具有更高的使用适应度。文章以光伏发电的MPPT控制技术为切入点,首先介绍了一种新型的碲化镉发电玻璃,说明了其具备的性质;其次,介绍了目前光伏电池所应用的基础控制方法;再次,对恒压法、扰动观察法和电导增量法的原理和适用范围进行说明。考虑到电导增量法由于其步长无法自适应而导致其寻优速度、寻优精度不能兼顾的缺陷,介绍了一种改进的电导增量法并对其进行了仿真分析,说明了该改进方法的MPPT控制性能。

As countries in the world begin to advocate the development of clean energy,driven by factors such as market demand,the scale of photovoltaic power generation has continued to expand and achieved good results.Compared with wind power generation,photovoltaic power generation has a flexible structure,is easy to install and can achieve noise-free operation;compared with hydropower generation,photovoltaic power generation has lower requirements on the geographical environment and has higher adaptability to use.This paper takes the MPPT control technology of photovoltaic power generation as the starting point,firstly introduces a new type of cadmium telluride power generation glass,and explains its properties;secondly,introduces the basic control methods currently applied to photovoltaic cells;The principle and scope of application of the pressure method,the disturbance observation method and the conductance increment method are explained.Considering the defect that the incremental conductance method cannot take into account the optimization speed and accuracy due to its inability to adapt its step size,an improved incremental conductance method is introduced and simulated and analyzed,and the improvement is illustrated.MPPT control performance of the method.