基于遮荫度模型的光伏阵列自适应重构系统

An Adaptive Reconfiguration System of Photovoltaic Array Based on Shading Degree Model

在各种光伏发电系统中,普遍存在局部遮荫或光照不均等现象。遮荫造成的阵列失配现象以及热斑效应不仅影响太阳能发电系统的功率输出,还会造成安全和可靠性问题。提出一种新的基于遮荫度模型的自适应重构方法来减少遮荫对太阳能阵列的影响。利用遮荫度模型的控制算法,在确定遮荫度的前提下,用开关矩阵改变补偿电池组与固定光伏阵列的连接,以提高太阳能阵列在局部遮荫时的输出功率。

Partial shade conditions are common in all kinds of photovoltaic（PV） systems.The mismatch phenomenon such as partial shade affects the power generated by solar system and leads to security and reliability problem.This paper proposes a new shading degree model-based adaptive reconfiguration method to reduce the effect of shadows on solar array.According to the shading degree of the solar PV array,the shading degree model-based control algorithm uses a switching matrix to change the connection of a solar adaptive bank and a fixed part of a solar photovoltaic array,which increases the power output of the solar PV array.