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.
| Identifer | oai:union.ndltd.org:TORONTO/oai:tspace.library.utoronto.ca:1807/31391 |
| Date | 19 December 2011 |
| Creators | Poshtkouhi, Shahab |
| Contributors | Trescases, Olivier |
| Source Sets | University of Toronto |
| Language | en_ca |
| Detected Language | English |
| Type | Thesis |
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