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Modeling and Control of a Power Electronic Cascade for the Multi DC Bus Supply of a Seven-Level NPC Voltage Source Inverter
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| Author(s) |
Abdelaziz Talha, El-Madjid Berkouk, Bruno Francois, Mohamed Seghir Boucherit |
| Abstract |
The stability problem of the input DC voltages in
a seven-level Neutral Point Clamping (NPC) Voltage Source
Inverter (VSI) is recalled and illustrated. A first solution
involving six controlled-voltage (CV) rectifiers is presented.
A knowledge model of this converter using switching
functions and a PWM strategy is detailed. For an economic
point of view, a second power structure is proposed. It
consists in using only 3 CV rectifiers but the instability of
intermediary DC voltages is observed. To solve this problem
the power structure is modified by adding clamping bridges
across capacitors in order to limit their deviations.
Additional control functions are then introduced. The
obtained results are full of promise to be used to stabilise the
input DC voltages of these converters. |
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| Filename: | T3-119.pdf |
| Filesize: | 254.3 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-12 by System |
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