Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21616
Title: Maximum power point tracking for PV systems under partial shading conditions using current sweeping
Authors: Tsang, KM 
Chan, WL 
Keywords: Maximum power point tracking
Partial shading conditions
Photovoltaic system
Issue Date: 2015
Publisher: Pergamon Press
Source: Energy conversion and management, 2015, v. 93, p. 249-258 How to cite?
Journal: Energy conversion and management 
Abstract: Partial shading on photovoltaic (PV) arrays causes multiple peaks on the output power-voltage characteristic curve and local searching technique such as perturb and observe (P&O) method could easily fail in searching for the global maximum. Moreover, existing global searching techniques are still not very satisfactory in terms of speed and implementation complexity. In this paper, a fast global maximum power point (MPPT) tracking method which is using current sweeping for photovoltaic arrays under partial shading conditions is proposed. Unlike conventional approach, the proposed method is current based rather than voltage based. The initial maximum power point will be derived based on a current sweeping test and the maximum power point can be enhanced by a finer local search. The speed of the global search is mainly governed by the apparent time constant of the PV array and the generation of a fast current sweeping test. The fast current sweeping test can easily be realized by a DC/DC boost converter with a very fast current control loop. Experimental results are included to demonstrate the effectiveness of the proposed global searching scheme.
URI: http://hdl.handle.net/10397/21616
ISSN: 0196-8904
EISSN: 1879-2227
DOI: 10.1016/j.enconman.2015.01.029
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