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Title:Implementation and control of distributed maximum power point tracking in solar photovoltaic applications
Author(s):Schuck, Marcel
Advisor(s):Pilawa-Podgurski, Robert C.
Department / Program:Electrical & Computer Eng
Discipline:Electrical & Computer Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):solar photovoltaic
maximum power point tracking
distributed power electronics
multiphase converter
dc-dc buck converter
ripple cancellation
Abstract:Maximum power point tracking (MPPT) is an important feature in solar photovoltaic (PV) systems as it increases the energy yield from such systems by optimizing their operating point. Current state-of-the-art solutions perform MPPT for a whole system, a string of panels or an individual panel within a PV system. This results in a loss of energy when the optimal operating point varies among different units. In this thesis, the implementation of MPPT on the sub-panel level is presented. This enables increased energy output under mismatched conditions (e.g. due to partial shading) across the system. Three centrally controlled dc-dc buck converters with series connected outputs are implemented and tested. As the maximum power point (MPP) of panel sections may vary, the proposed multiphase converters operate under asymmetric conditions. Therefore, a control technique to minimize the output current ripple under these conditions is mathematically derived and verified through simulations and experimental measurements.
Issue Date:2013-05-24
Rights Information:Copyright 2013 Marcel Schuck
Date Available in IDEALS:2013-05-24
Date Deposited:2013-05

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