电力系统保护与控制2024，Vol.52Issue(4)：87-99,13.DOI:10.19783/j.cnki.pspc.230681
基于定位收缩法的局部阴影条件下光伏最大功率点跟踪
Locate and shrink method for PV maximum power point tracking in partial shading conditions
摘要
Abstract
Photovoltaic maximum power point tracking is an important way of improving photovoltaic power generation efficiency.In partial shading conditions,the characteristic curve of a photovoltaic array has multiple peaks,and it is easy for the conventional algorithm to fall into a local optimum.How to find the global maximum power point(GMPP)in partial shading conditions is crucial.In this paper,a locate and shrink algorithm(LSA)is proposed.This applies the concept of boundary shrinkage to gradually shrink the two boundary points to the GMPP.The first stage of the LSA proposes a peak location method that the duty cycle range of the main peaks can be located by adaptive sampling combined with the I-V characteristic curve.The peak location method can be combined with other unimodal algorithms and has strong ability to expand.In the second stage,a shrinkage method based on a three-point criterion is proposed.This can quickly find the peak point in the range of one single peak via shrinking boundaries and has strong environmental adaptability.Both simulations and experiments are performed for the LSA and several other algorithms.The results show that the LSA has obvious advantages in tracking speed,tracking efficiency and steady-state oscillation.关键词
光伏局部阴影条件/最大功率点跟踪/定位收缩法/三点准则Key words
photovoltaic partial shading conditions/maximum power point tracking/locate and shrink algorithm/three-point criterion引用本文复制引用
高放,胡嵘昭,殷林飞,曹会彬..基于定位收缩法的局部阴影条件下光伏最大功率点跟踪[J].电力系统保护与控制,2024,52(4):87-99,13.基金项目
This work is supported by the National Natural Science Foundation of China(No.61720106009,No.61773359 and No.52107081). 国家自然科学基金项目资助(61720106009,61773359,52107081) （No.61720106009,No.61773359 and No.52107081）
