局部阴影条件下光伏阵列最大功率点跟踪方法对比研究

Comparison of maximum power point tracking techniques for photovoltaic array under partial shade conditions

近年来涌现了许多针对局部阴影条件的光伏阵列最大功率点跟踪(MPPT)方法,这些方法的跟踪性能表现不一,目前也缺乏统一的评价标准。基于对大量文献的阅读与总结,选取了五种较为典型的多峰MPPT方法,对其在大量典型局部阴影案例下的跟踪性能进行Matlab仿真分析,并总结对比了各类MPPT算法的静态跟踪性能、动态跟踪性能以及MPPT效率。本文有助于光伏工程设计与装置研发人员快速了解并掌握当前最新的MPPT方法及其性能,为实际应用中MPPT方法的选取以及提高发电效率提供借鉴。

Many maximum power point tracking （MPPT） methods suitable for partial shade conditions have been proposed in recent years, which are called multi-peak MPPT methods. Their tracking performance differs greatly from each other in different applications. Also, there is no uniform standard to evaluate the performance of multi- MPPT methods in complex shade conditions. However, the low-knowledge of multi-MPPT methods remains a barri- er to choose and apply MPPT methods. The basic principles of multi-peak MPPT methods are illustrated briefly based on reading and summarizing of many literatures. Their accuracy and dynamic power oscillation under plenty partial shade cases are analyzed through Matlah simulation. As results, static tracking performance, dynamic track- ing performance and MPPT efficiency of multi-peak MPPT methods are summarized. These works are helpful to en- gineers who devote to PV power engineering to well-understand latest MPPT methods and their performance, and provide advice to choose MPPT methods and advance MPPT efficiency in practical application.