光伏并网发电系统最大功率追踪算法的稳定性研究

随着光伏发电技术及光伏产业的发展，太阳电池阵列如何在同样日照、温度的条件下输出尽可能多的电能成为人们的研究重点。然而，根据太阳电池的工作原理，当光照强度，温度等自然条件改变时，太阳电池的输出特性将随之改变，输出功率及最大工作点亦相应改变。分析了几种常见的最大功率跟踪方法（Maximum Power Point Tracking，简称MPPT），针对扰动观测法中的误判现象进行分析，并加以改进，使系统更加平稳地输出有功功率，实现了对最大功率点的稳定追踪。

Stability of Maximum Power Point Tracker Algorithm of Photovoltaic Power System

With advance of the photovoltaic technology and photovoltaic industry, how to obtain the maximum energy output from the solar cell array under the same sunshine and temperature conditions has been a focus for intensive studies. However, according to the working principles of the solar cell, the output feature, the output power and the maximum working point will change with changes of the natural conditions, like sunshine intensity and temperature. This paper analyzes several common methods of maximum power point tracking (MPPT), presenting an analysis of misjudgments in the perturbation observation, and proposing the proper improvement methods so that the system can output the active power more stably and realize the stable tracking of the maximum power point.