基于梯度法和扰动观察法相结合的多峰值MPPT算法

当多个光伏电池串联组成的光伏阵列被部分遮挡时，光伏特性曲线会出现多个局域峰值，此时基于单峰值的MPPT算法将有可能失效。针对这种情况，本文提出了一种结合梯度法和扰动观察法的多峰值最大功率跟踪算法。该算法采用梯度法搜索出第一个阶梯功率点，并以此功率点作为扰动观察法的起始点搜索局部最大功率点，继而利用此局部最大功率点进行搜索，最后得到最大功率点。与其它多峰值MPPT算法相比，该算法不仅具有编程简便、易于实现的特点，而且具有搜索跟踪速度快和抗干扰能力强等优越性。...

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Bibliographic Details
Published in电测与仪表 Vol. 51; no. 20; pp. 49 - 52
Main Author 谭伟付 龚仁喜 林泉 周家帅
Format Journal Article
LanguageChinese
Published 广西大学电气工程学院,南宁,530004 2014
Subjects
MPPT
多峰值
扰动观察法
梯度法
gradient algorithm
MPPT
梯度法
multi-peak
perturbation and observation algorithm( P&O algorithm)
多峰值
扰动观察法
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ISSN1001-1390

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Summary:当多个光伏电池串联组成的光伏阵列被部分遮挡时，光伏特性曲线会出现多个局域峰值，此时基于单峰值的MPPT算法将有可能失效。针对这种情况，本文提出了一种结合梯度法和扰动观察法的多峰值最大功率跟踪算法。该算法采用梯度法搜索出第一个阶梯功率点，并以此功率点作为扰动观察法的起始点搜索局部最大功率点，继而利用此局部最大功率点进行搜索，最后得到最大功率点。与其它多峰值MPPT算法相比，该算法不仅具有编程简便、易于实现的特点，而且具有搜索跟踪速度快和抗干扰能力强等优越性。
Bibliography:MPPT;multi-peak;gradient algorithm;MPPT
23-1202/TH
TAN Wei-fu, GONG Ren-xi, LIN Quan, ZHOU Jia-shuai （ College of Electrical Engineering, Guangxi University, Nanning 530004, Guang xi ,. China）
When the PV array cascaded by multiple PV cells is partially covered,multiple local peak values may ap-pear on the photovoltaic characteristics curve. In this case,the MPPT algorithm based on a single peak will likely fail. In response to this situation,this paper proposed a multiple-peak value MPPT algorithm,in which the gradient algorithm and perturbation and observation algorithm were combined. The method began with the search for the first power point by the gradient algorithm;then the power point was used as the starting point of the perturbation and ob-servation algorithm in searching for the maximum local power point;and this local maximum power point was in turn employed to search for the maximum global power point. Compared with other multi-peak MPPT algorithms,the pro-posed algorithm was characterized not only by
ISSN:1001-1390