摘要
在光伏发电系统中,光伏电池输出特性受光照强度及环境温度影响很大,具有明显的非线性特征。为了提高光伏电池的利用效率,需要对光伏电池的最大功率点进行快速准确地跟踪控制。本研究对短路电流法与扰动观察法进行了详细的分析,最后结合两种方法的优点,提出了双模式最大功率点跟踪方法,该方法具有跟踪外部环境变化快,最大功率点无振荡现象,对光伏电池利用率高的优点。此外,日照变化剧烈情况下该方法不会失去MPPT控制的能力。
In photovoltaic systems,photovoltaic cell output characteristics are affected greatly by light intensity and environmental temperature,with significant nonlinear characteristics.In order to improve the utilization efficiency of photovoltaic cells,it requires fast and accurate tracking and controlling the maximum power point.This paper carried out a detailed analysis on short-circuit current law and the disturbance observation,and finally combine the advantages of both methods proposed the dual-mode maximum power point tracking method,which has a fast tracking the changes of the external environment,without oscillation at the maximum power point,high utilization of the advantages of photovoltaic cells.In addition,it will not lose the ability to control MPPT in the case of rapid change of the sunshine.
出处
《青岛科技大学学报（自然科学版）》
CAS
北大核心
2012年第1期78-81,共4页
Journal of Qingdao University of Science and Technology:Natural Science Edition
关键词
光伏发电系统
MPPT
短路电流法
扰动观察法
双模式
photovoltaic systems
MPPT
short-circuit current method
disturbance observation
dual-mode
