Development of an Autonomous Distributed Maximum Power Point Tracking PV System
| Autor: | Kun-Hung Chen, 陳昆宏 |
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| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 An autonomous distributed maximum power point tracking (DMPPT) photovoltaic (PV) system is proposed in this thesis. The proposed DMPPT PV system is a two-stage circuit topology, which consists of a set of series-connected micro-converters and a single-phase grid-tied inverter. The four-switch buck-boost converter (FSBBC) with three operation modes and a smooth transition method is adopted to realize the maximum power point tracking (MPPT) function for each PV module. The single-phase grid-tied inverter with bipolar sinusoidal pulse width modulation (SPWM) control and ac line current regulation are utilized to control the inverter output current and input voltage. Besides, the autonomous start-up and protection procedures are well-developed for the success of the system operation. The small-signal ac model is derived to analyze the dynamic behavior and the stability of the autonoumous PV module (APVM) which consists of a PV module and a FSBBC. Moreover, the proportion-integral-resonant (PIR) compensator is developed to compensate the 120Hz ripple voltage from the ac mains and to achieve better MPPT performances. Finally, computer simulations and hardware experimental results are presented to verify the performances of the propoed DMPPT PV system. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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