A Study of DTC-Power Electronic Cascade Fed by Photovoltaic Cell-Three-Level NPC Inverter
Iqbal Messaïf, El-Madjid Berkouk, Nadia Saadia
DOI: 10.4236/sgre.2010.13016   PDF   HTML     6,844 Downloads   11,918 Views   Citations


This paper proposes a high performance three-level inverter Neutral Point Clamped (NPC) structure for photovoltaic system. The proposed configuration which can boost the low voltage of photovoltaic (PV) array, can also convert the photovoltaic DC power into high quality AC power. Attention has been paid to the problem of neutral point potential variation. In this way, a Direct Torque Control (DTC) technique has been applied and the estimated value of the Neutral Point Potential (NPP) is used, which is calculated by motor currents. This control strategy uses the redundancy presented by the inverter for selecting appropriate switching state through a switching table to achieve the control of NPP. This study shows the effect of the stability problem of the DC voltages and good static and dynamic performances were obtained in simulation of the proposed cascade “photovoltaic cell-three-level NPC VSI-induction motor”.

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I. Messaïf, E. Berkouk and N. Saadia, "A Study of DTC-Power Electronic Cascade Fed by Photovoltaic Cell-Three-Level NPC Inverter," Smart Grid and Renewable Energy, Vol. 1 No. 3, 2010, pp. 109-118. doi: 10.4236/sgre.2010.13016.

Conflicts of Interest

The authors declare no conflicts of interest.


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