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Power processing limits of offshore wind turbine systems based on thermal stress
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| Author(s) |
Sumitha MOHAN, RAJENDRA NAIK |
| Abstract |
Entitlement of the power handling capability with appropriate semiconductor devices and switching frequencies is necessary to determine the feasibility (from a cost and reliability standpoint) of high power (~ 4MW or higher) medium voltage offshore wind turbine systems. In this paper, the power conversion system of a back-to-back three phase Neutral Point Clamped (NPC) converter fed by a Permanent Magnet Synchronous Generator (PMSG) is investigated for an offshore wind turbine at the 6-8 MW power level. The objective is to ascertain the power processing capability of the back-to-back converter system with specific medium voltage semiconductor devices (press pack Insulated Gate Bipolar Transistors (IGBT), Integrated Gate Commutated Thyristor (IGCT) and Injection Enhanced Gate Transistors (IEGT)) for typical power factor requirements of 0.9 to unity at the grid. Detailed thermal device models are used for an analysis of individual component losses and overall system efficiency to determine allowable switching frequencies for these power semiconductor devices. |
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| Filename: | 0557-epe2014-full-15192914.pdf |
| Filesize: | 57.01 KB |
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| Type |
Members Only |
| Date |
Last modified 2015-06-08 by System |
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