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Analysis and Implementation of Fine-grained Distributed Maximum Power Point Tracking in Photovoltaic Systems

This thesis deals with quantifying the merits of Distributed Maximum Power Point Tracking (DMPPT), as well as providing solutions to achieve DMPPT in PV systems. A
general method based on 3D modeling is developed to determine the energy yield of PV
installations exploiting different levels of DMPPT granularity. Sub-string-level DMPPT
is shown to have up to 30% more annual energy yield than panel-level DMPPT. A
Multi-Input-Single-Output (MISO) dc-dc converter is proposed to achieve DMPPT in
parallel-connected applications. A digital current-mode controller is used to operate the MISO converter in pseudo-CCM mode. For series-connected applications, the virtualparallel concept is introduced to utilize the robustness of the parallel connection. This concept is demonstrated on a three-phase boost converter. The topology offers reduced output voltage ripple under shading which increases the life-time of the output capacitor.
The prototypes yield output power benefits of up to 46% and 20% for the tested shading
conditions.

Identiferoai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OTU.1807/31391
Date19 December 2011
CreatorsPoshtkouhi, Shahab
ContributorsTrescases, Olivier
Source SetsLibrary and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada
Languageen_ca
Detected LanguageEnglish
TypeThesis

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