Performance evaluation of SiC MOSFETs for isolated DC/DC conversion in Medium Voltage Photovoltaic Power Plants
Abstract
Over the last decade, the rating of photovoltaic power stations has increased progressively; however; they still operate at low voltage (below 1500VDC for PV string side and below 800VAC-3~ for the power injection side. Hence, new architectures with an intermediate MVDC collector are investigated. This paper introduces a new topology of isolated DC/DC converter based on 1.7-kV and 3.3-kV SiC power modules, which allows the connection of PV panels to a MVDC collector upstream from the MVAC distribution grid. As a prelude to the realization of a full-scale prototype, 1.7 kV SiC MOSFETs are characterized in hard- and soft-switching condition. Finally, a study supported by simulations pointed out that the proposed converter shows a high efficiency (> 98.5%)
Domains
Electric power
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Performance evaluation of SiC MOSFETs for isolated DCDC_PCIM_preprint.pdf (1.49 Mo)
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