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Modeling and steady-state analysis of a stand-alone, photo-voltaic-three phase inverter power system

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2 Author(s)
Hossein Karimi-Davijani ; Department of Electrical and Computer Engineering/Center for Energy Systems Research, Tennessee Technological University, Cookeville, TN 38505 ; Olorunfemi Ojo

A part of an electric power system can operate as a standalone system without any connection to the main grid. Such autonomous systems include dedicated power systems for rural areas, moveable military bases and facilities requiring premium power quality. For the proper calculation and control operation of autonomous generation systems, the dynamics of the power sources and the loads must be properly accounted for thorough adequate system modeling. In this paper, a photovoltaic (PV) system and a battery bank are presented as energy sources, which with the aid of converters, provide electric power to three-phase balanced stand-alone loads. With the aid of DC-DC converters, source output powers and the DC link voltage are controlled. A three phase DC-AC inverter converts the input DC voltage to AC and controls the frequency and magnitude of the load voltage. The modeling and steady state operation of the system are set forth under various operating conditions while accounting for the nonlinearity of the PV source and load type. Besides, the maximum power point tracking algorithm of the solar system is added. The controller design and structures are explained in details and the dynamic behavior of the whole system is studied by computer simulations.

Published in:

Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE

Date of Conference:

6-11 March 2011