Novel Cascaded Switched-Diode Multilevel Inverter for Renewable Energy Integration
作者： Lei Wang , Q. H. Wu , Wenhu Tang
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摘要: In this paper, a new topology of two-stage cascaded switched-diode (CSD) multilevel inverter is proposed for medium-voltage renewable energy integration. First, it aims to reduce the number switches along with its gate drivers. Thus, installation space and cost are reduced. The spike removal switch added in first stage provides flowing path reverse load current, as result, high voltage spikes occurring at base stepped output based upon conventional CSD topologies removed. Moreover, resolve problems related dc source fluctuations used integration, clock phase-shifting (CPS) one-cycle control (OCC) developed inverter. By shifting pulse phase every unit, staircase-like waveforms obtained strong suppression ability against sources achieved. Simulation experimental results discussed verify feasibility performances controlled by CPS OCC method.
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