Rеvuе des Energies Renouvelables
Volume 15, Numéro 3, Pages 501-512
2012-09-30

Stability Of Input Voltages Of A Three-level Inverter Npc Fed By Photovoltaic Sources



Authors : Bouchafaa F. . Chouder A. . Boukhalfa S. .

Abstract

In this paper we study the stability of input voltages of the cascade consisting of a photovoltaic inverter and a three-level structure NPC, feeding a synchronous machine with permanent magnets (PMSM) commissioned by the speed command flow oriented. For this, we first present the modeling of the Photovoltaic, then modeling and strategy to control the inverter three-level structure NPC. In the end, to address the midpoint fluctuation and instability of input voltages at the terminals of the inverter, proposed a solution consisting of a bridge clamping which gave promising results.

Keywords

Photovoltaic generator, Multilevel PWM inverter, Digital MPPT, Voltage stability, Clamping bridge, PMSM.

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