AN AIDED DESIGN ANALYSIS METHODOLOGY FOR OPTIMAL GRID-CONNECTED RESIDENTIAL PHOTOVOLTAIC SYSTEMS

Mohamed Djarallah - Boubaker Azoui

   The evolution in the grid connected photovoltaic (PV) system design tools is not promoted compared to the great progress made in the PV material fabrication, and in the stand alone PV system development. So a more advanced examination is needed for each component of the PV array-utility grid chain, particularly the power conditioning unit, which is the key element in these systems. Success optimal operation of the whole system depends on the decision that a designer has to make for determination of the power conditioner parameters. This concerns in particular systems development and their control strategies, which depend completely on the available design tools and implantation techniques. In this paper a set of relatively simple decoupled modelling mathematical formulae, suitable for both frames DC and AC, are developed and investigated. These expressions are useful in sizing of the PV array and the conditioning unit parameters which allow determination of the minimum power to be recovered and the consequent modulation index. Expressions with their transformation techniques are validated followed by simulation and discussion of an optimum energetic case study.

Keywords: grid connected PV systems, stand alone PV systems, maximum power point, load operating characteristics, inverter topologies

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