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1-MW Advanced T-type NPC Converters for Solar Power Generation System
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| Author(s) |
Kansuke FUJII, Takayuki KIKUCHI, Hisashi KOUBAYASHI, Kazuyuki YODA |
| Abstract |
A multi-level topology is one of the effective approaches to improve the efficiency of power converters. Recently, three-level converters are used not only in medium voltage converters but also in low voltage converters in order to improve the conversion efficiency. Advanced T-type NPC (AT-NPC) converter belongs to three-level converters and utilizes Reverse-Blocking IGBT (RB-IGBT) as a bi-directional switch. The AT-NPC topology is simple and enables low conduction losses of the converters. This time, the authors develop a 1-MW photovoltaic converter using AT-NPC topology. This photovoltaic converter is outdoor-type transformer-less single-stage converter, and consists of four 250-kW power units. In addition, to reduce EMI from the converter, the neutral point of the LC filter is connected to the medium point of the DC-link voltage. This paper describes the features of this solar power inverter, power units using AT-NPC IGBT modules connected in parallel and the evaluation results. |
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| Filename: | 0453-epe2013-full-05515667.pdf |
| Filesize: | 345.6 KB |
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| Type |
Members Only |
| Date |
Last modified 2014-02-09 by System |
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