IJSTR >> Volume 4 - Issue 9, September 2015 Edition

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AUTHOR(S)

Aliaa N.Madkor, Dr. Wagdy R.Anis, Dr. Ismail Hafez

KEYWORDS

Index Terms: Photovoltaic (PV) System – (PV) Inverters – (PV) Reliability – (PV) Efficiency– (PV) Design- (PV) Economical analysis – (PV) Tracking system.

ABSTRACT

Abstract: The DC/AC inverters are used in grid-connected PV energy production systems as the power processing interface between the PV energy source and the electric grid. The energy injected into the electric grid by the PV installation depends on the amount of power extracted from the PV power source and the efficient processing of this power by the DC/AC inverter. The main target of this paper is to determine the principle that achieves high reliability and efficiency with the low cost of the photovoltaic grid-connected system. Accordingly, we are considering the inverter as it represents the important part of the system, by a comparison among the following three systems: The system has one inverter with the power of 100 (kw); The system has two inverters each has the power of 50 (kw); and The system has twenty inverters each has the power of 5 (kW). We will check the effect of number of inverters in photovoltaic grid-connected system on efficiency, reliability and cost taking into account the fixed system, one axis tracking system and two axes tracking system. Also, in order to validate the accuracy of the proposed control strategy, grid-connected PV system is simulated based on MATLAB/Simulink.

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