快速变化环境条件下最大功率点跟踪方法

A Novel Maximum Power Point Tracker for Fast-changing Environmental Conditions

针对光伏发电系统在光照强度、环境温度等参数改变的情况下,能够进行动态快速追踪,从而解决高效的追踪最大功率点的科学技术难题,提出一种快速变化环境条件下最大功率点跟踪方法。该方法的实现由控制系统分析实时检测到的光伏电池阵列的输出电压和电流,通过最大功率跟踪算法MPPT计算输出量,控制BOOST驱动电路中的IGBT占空比,从而改变负载特性,实现最大功率点快速、精确地跟踪。利用该方法研究开发的光伏发电系统装置,除适用于太阳能光伏发电系统光伏阵列在环境条件一定外,特别适用于光伏阵列在光照突变以及在部分遮挡(如云层、建筑物、植物等)等复杂条件下,光伏发电系统最大功率输出的工作状况。

Photovoltaic systems can dynamically fast track in circumstances of the change of light intensity,environmental temperature and other parameters,so as to solve the science and technology problem of maximum power point tracking problems.A maximum power point tracking method for photovoltaic power generation system was proposed,which was implemented by control system to analyze the photovoltaic array output voltage and current obtained by real-time detection,output was calculated through the algorithm of maximum power point tracking MPPT and the IGBT duty cycle was controlled in the BOOST drive circuit,thus the load characteristics was changed to achieve maximum power point fast and accurate tracking. The photovoltaic power generation system device,which has been developed by using this method,can be not only applied on solar photovoltaic power generation system of photovoltaic array under certain environmental conditions,but also especially suitable for photovoltaic array at the sudden light,as well as in partial occlusion,such as clouds,buildings,plants,under complex conditions.