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INTRODUCTION OF "DUAL-SWITCHING" CELLES IN HIGH POWER PHASE-CONTROLLED CONVERTERS - A NEW CONCEPT TO CANCEL THE REACTIVE POWER
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| Author(s) |
F. Richardeau; Ph. Ladoux; Y. Cheron |
| Abstract |
High power converters (MW) use thyristors arrangements in phase-controlled mode by the voltages of the power supply network. However, low-rank harmonic currents and lagging reachtive power are drawn on AC side. In this paper, a new "dual-switching" mode with GTOs switches reverse blocking capabilities is studied and carried out in basic rectifier bridges and naturally commutated cycloconverter topologies. This concept allows to cancel the reactive power flow between power supply network and direct converters whatever load parameters. Global features are given with a final comparison list, especially on following "dual-switching" topologies: full-bridge cycloconverter, mixed-bridge cycloconverter and series arrangement of full-bridges cycloconverter. Presented experimental results are based on a 20 kVA versatile cycloconverter prototype and confirm the theoretical study. These topologies are expected for a better matching between network and high power converters. |
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| Filename: | Unnamed file |
| Filesize: | 515.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2018-04-09 by System |
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