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    Improved DC-DC converter for photovoltaic power system applications, An

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    An improved DC-DC converter for ...
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    Author
    Lute, Christopher D.
    Advisor
    Simões, M. Godoy
    Date issued
    2014
    Date submitted
    2014
    Keywords
    power electronics
    photovoltaic
    maximum power point tracking
    DC-DC converters
    Electric currents, Direct
    Photovoltaic power systems
    Electric current converters
    Energy conversion
    Power electronics
    
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    URI
    http://hdl.handle.net/11124/485
    Abstract
    The Floating Interleaved Boost Converter (FIBC) is a novel DC-DC converter topology that can provide high voltage gain with improved efficiency and decreased input ripple when compared to conventional converters. These advantages make the FIBC a promising candidate for solar photovoltaic (PV) power system applications. PV modules produce low voltage Direct Current (DC) electricity; this must first be converted to a high voltage DC before being converted to Alternating Current (AC). The FIBC has been demonstrated as a DC-DC converter solution for fuel cells and electric vehicle applications in laboratory settings. In this thesis, the FIBC will be investigated for PV applications, focusing particularly on challenges and solutions for commercialization. This thesis will present a four phase FIBC for PV power system applications. The circuit topology will be analyzed mathematically, and its characteristic advantages will be highlighted. A dual loop, digital linear feedback controller will be developed that is capable of regulating both current and voltage in the device. Additionally, Maximum Power Point Tracking (MPPT), a requisite for PV power converters, will be included and demonstrated. Simulation results from PSIM will be provided to illustrate key findings and control development. The development of a hardware prototype using an embedded microcontroller will be detailed. Finally, the experimental testing and results will be discussed.
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