A Dual DC Output Power Supply for a Stand-alone Photovoltaic System

This article presents a dual DC power output for easy integration of renewable energy sources and battery banks at a low-voltage DC bus. The low-voltage loads are connected to the low-voltage DC bus directly (across the battery banks), obviating an additional conversion stage. Such low-voltage loads...

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Bibliographic Details
Published in:Electric power components and systems 2015-06, Vol.43 (8-10), p.939-950
Main Authors: Mary, Samikannu Sarojini, Kumar, Subramaniam Senthil, Poluru, Syam Prasad, Reddy, Maddikara Jaya Bharata
Format: Article
Language:English
Subjects:
batteries
Converters
Data buses
DC-DC boost converter
Direct current
Electric batteries
Electric currents
Electric potential
Electric power generation
Genetic algorithms
incremental conductance algorithm
Maximum power
maximum power point tracking
Photovoltaic cells
photovoltaic system
Power supply
Solar cells
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Summary:This article presents a dual DC power output for easy integration of renewable energy sources and battery banks at a low-voltage DC bus. The low-voltage loads are connected to the low-voltage DC bus directly (across the battery banks), obviating an additional conversion stage. Such low-voltage loads are LED-based lighting, computers, laptop chargers, etc. The proposed system consists of a photovoltaic array, DC-DC converters, a maximum power point tracker, and a storage medium (battery) targeted for low-voltage (24 V) and high-voltage (110 V) DC loads. The maximum value of photovoltaic power is extracted using the buck DC-DC converter along with the effective incremental conductance maximum power point tracking technique to control the power transfer to the low-voltage DC grid. The DC-DC boost converter is designed to operate at a constant voltage of 110 V DC load. The proportional-integral-derivative control parameters for voltage mode closed-loop control of the boost converter are chosen by using the genetic algorithm technique. A prototype system has been built in the laboratory, and its satisfactory working has been demonstrated experimentally for the different shading and loading conditions; experimental results are provided.
ISSN:1532-5008
1532-5016
DOI:10.1080/15325008.2015.1012769