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In the multi-MW wind turbine market, the maximum power rating of a commercial wind turbine has been increased more than 5MW with a view to generate more power from Wind Power Sites [1]. The three-level neutral-point-clamped voltage-source converter has been highly applied in wind generation system. Despite the advantages, the capacitor voltage unbalancing in NPC converters has become a burning issue...
This paper explores the possibility of connecting two Wind Turbine Generators (WTG) to the grid using a single three level inverter. In the proposed system the rectified output of one WTG is connected across the upper dc-link capacitor of a standard diode clamped three level inverter. Similarly the rectified output of the other WTG is connected across the lower capacitor. This particular combination...
In this paper the power losses of both Z-source- inverter (ZSI) and voltage-source inverter linked with a dc/dc boost inverter (VSI+BC) are compared. Therefore the circuits are simulated in time domain by means of numerical methods whereas the switching and conducting losses are calculated separately and in parallel. A main focus is on mathematical description of the current rms through the IGBTs...
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