Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/1E397B93-26E9-461D-9A3E-AC06955D5F9E | ||
| Year | 2025 | ||
| Type of Item | Diploma Work | ||
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| Bibliographic Citation | Andreas Karogiannis, "Distributed maximum power point tracking of photovoltaic array with multilevel DC/AC converter", Diploma Work, School of Electrical and Computer Engineering, Technical University of Crete, Chania, Greece, 2025 https://doi.org/10.26233/heallink.tuc.103386 | ||
| Appears in Collections |
The increasing global demand for renewable energy has driven significant advancements in photovoltaic (PV) systems, particularly in their integration with the electrical grid. Among various power conversion technologies, multilevel inverters have gained prominence due to their ability to improve power quality, reduce harmonic distortion and enhance overall system efficiency. This thesis focuses on the modeling and simulation of a multilevel full-bridge inverter powered by independent PV arrays, each with its own, distributed Maximum Power Point Tracking (MPPT) algorithm, in comparison to widely proposed systems, which have a single unit for that calculation. The primary objective of this study is to analyze the performance of the inverter, and ensure the accurate calculation of MPPT for each array individually under different operating conditions, particularly in response to variations in solar irradiance and temperature. First, the characteristic curves of both the PV panels and arrays are analyzed, to examine their behavior under different solar irradiance levels. Next, two MPPT algorithms are studied and proposed for the system, with a strong emphasis on the power feed-forward technique, to accelerate MPPT calculations. Once the system is confirmed to be operating at its maximum possible power, key performance graphs are evaluated, to verify its efficiency. Finally, both the overall system and the MPPT algorithms are assessed under varying irradiance conditions, to determine their effectiveness and their correctness.
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