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Multi-level power converters have been widely used in wind power field systems. For multi-MW wind power converter, its efficiency and reliability are the key issues in the whole wind power generation system. Multi-level wind power converters have many power semiconductors, whose power losses and reliability have great significances to the converters' efficiency and reliability. In this paper, an optimized...
Multi-MW wind power converter's reliability is a key issue for the whole wind power generation system. Due to wind power fluctuation, IGBT's handling power is fluctuating largely and rapidly, which will cause a large junction temperature variation of IGBT. Thermal stress is the main factor affecting IGBT's lifetime. In this paper, the adaptive thermal control is proposed to improve IGBT's lifetime...
Multilevel converters are particularly suitable to be used in medium to high voltage applications, such as in a Railway Power Compensator (RPC), since they can give better quality outputs and reach higher voltage rates compared with two-level converters. In this paper, a novel 6-stage hybrid cascaded multilevel converter for medium-voltage large-capacity applications is proposed. It can reach the...
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