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Evaluation of a NPC1 phase leg built from three standard IGBT modules for 1500 VDC photovoltaic central inverters with 500 kVA and beyond
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| Author(s) |
Uwe JANSEN |
| Abstract |
This paper presents the concept and characterization of a NPC1 phase leg built up out of threePrimePACK 2 power modules with .XT and 1200 V IGBT5. The target application of such atopology is 1500 V solar central inverter. After a short description of the cosmic ray reliability issuesleading to the NPC1 approach, different design concepts will be discussed. Double pulsemeasurements have been used to characterize the overvoltage during the long commutation in reactivepower mode. The moderate stray inductance of the long commutation path within the design of thePrimePACK 2 NPC1 phase leg allows a safe turn-off without the need of clamping diodes in thedriver. Furthermore the power conversion efficiency as well as the maximum power rating of a solarcentral inverter using the presented concept has been investigated by feeding the measured switchingenergies into simulations. It turns out that a power rating of more than 800 kVA can be reached due tothe higher power density and more efficient switching thanks to the .XT and IGBT5 technology. |
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| Filename: | 0121-epe2016-full-22431574.pdf |
| Filesize: | 489.6 KB |
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| Type |
Members Only |
| Date |
Last modified 2017-04-13 by System |
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