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Fault Detection in multilevel cascaded inverter using Parks Vector approach with balanced battery power usage
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| Author(s) |
Rui VENTURA, Andre MENDES, Antonio CARDOSO |
| Abstract |
Among the multilevel converter topologies the cascaded H-bridge converter (MCHBC) differs from other topologies by having series connections of several power cells, producing a better voltage quality and higher voltage output range, and using the same voltage power supply levels. This characteristic adds several benefits as it allows a modular system, the use of low voltage power supplies, and output voltage waveforms with low level of harmonic distortion. Having more semiconductors than a conventional 2-level voltage source inverter (VSI) the probability of a fault occurrence is bigger, and therefore the importance of having a system that can pinpoint the malfunctioning device is higher. This paper presents an integrated method to control a 3-phase MCHBC capable of distributing the energy uniformly by all batteries and simultaneously diagnose isolated gate bipolar transistors (IGBTs) open-circuit faults in the converter cells, using the phase voltage Park’s Vector components of the star connected MCHBC. Simulation and experimental results of the proposed control are presented for a three-phase induction motor load. |
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| Filename: | 0727-epe2011-full-16491137.pdf |
| Filesize: | 605.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2012-01-26 by System |
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