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Title PV Based Converter with Integrated Battery Charger for DC Micro-Grid Applications
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Date Available
University/Publisher IUPUI
Abstract

Indiana University-Purdue University Indianapolis (IUPUI)

This thesis presents a converter topology for photovoltaic panels. This topology minimizes the number of switching devices used, thereby reducing power losses that arise from high frequency switching operations. The control strategy is implemented using a simple micro-controller that implements the proportional plus integral control. All the control loops are closed feedback loops hence minimizing error instantaneously and adjusting efficiently to system variations. The energy management between three components, namely, the photovoltaic panel, a battery and a DC link for a microgrid, is shown distributed over three modes. These modes are dependent on the irradiance from the sunlight. All three modes are simulated. The maximum power point tracking of the system plays a crucial role in this configuration, as it is one of the main challenges tackled by the control system. Various methods of MPPT are discussed, and the Perturb and Observe method is employed and is described in detail. Experimental results are shown for the maximum power point tracking of this system with a scaled down version of the panel's actual capability.

Subjects/Keywords photovoltaic; power; mppt; converter; energy; microgrid; perturb and observe; electronics; dc dc converter; bidirectional; Photovoltaic power systems  – Automatic control  – Research; Electric current converters  – Research; DC-to-DC converters; Electric switchgear; Semiconductors  – Design and construction; Electric power distribution; Electric power systems  – Control; Photovoltaic power generation; Microelectronics  – Power supply; Microtechnology  – Research; Solar cells  – Research; Voltage-frequency converters; Distributed generation of electric power; Electric vehicles  – Power supply; Battery chargers; Smart power grids  – Research  – Analysis  – Evaluation; Distributed resources (Electric utilities); Feedback (Electronics); Switching circuits; Electronics  – Materials; Renewable energy sources
Contributors Santos Jr., Euzeli C. dos
Language en
Country of Publication us
Record ID handle:1805/6108
Repository iupui
Date Retrieved
Date Indexed 2020-01-07

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…20 2.5 Incremental Conductance Method . . . . . . . . . . . . . . . . . . . . 21 2.6 Perturb and Observe Method . . . . . . . . . . . . . . . . . . . . . . . 22 3.1 Proposed bidirectional DC-DC converter . . . . . . . . . . . . . . . . . 24…

…47 x SYMBOLS W watt V volt A ampere Ω Ohm xi ABBREVIATIONS MPPT Maximum Power Point Tracking PV Photovoltaic P&O Perturb and Observe IC Incremental Conductance xii ABSTRACT Salve, Rima MSECE, Purdue University, August 2014. PV…

…Various methods of MPPT are discussed and the Perturb and Observe method is employed and is described in detail. Experimental results are shown for the maximum power point tracking of this system with a scaled down version of the panel’s actual capability…

…Incremental Conductance method offers good performance under rapidly changing atmospheric conditions. NO YES YES NO YES NO NO YES YES NO Fig. 2.5. Incremental Conductance Method 2.4.5 Perturb and Observe Method The Perturb and Observe (P&O…

…hence the curve has to be tracked in the opposite direction in order to achieve the maximum power point once again. Figure 2.6 gives a step by step algorithm. NO YES Fig. 2.6. Perturb and Observe Method 1. Measure voltage from the PV panel. 2…

…method is one of the most commonly used methods for maximum power point tracking. Another method that is widely used is the Perturb & Observe method, commonly known as the P&O method. It is interesting to note a few inconsistencies between these two…

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