Voltage Balancing Control of a Three-Phase Hybrid-Clamped Five-Level Inverter Based on Optimal Switching Combination

Conference: PCIM Europe 2014 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/20/2014 - 05/22/2014 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2014

Pages: 7Language: englishTyp: PDF

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Wu, Xiaokun; Zeng, Yingyu; Wang, Kui; Li, Yongdong (Department of Electrical Engineering (Tsinghua University), China)

In this paper, a newly released single phase hybrid-clamped five-level inverter is extended to three phases. To solve the capacitor voltage balancing problem of the three-phase inverter, an optimal switching combination control strategy is proposed. This strategy takes advantage of the redundant switching states of the topology to counteract the voltage drift phenomenon of the capacitor. Performance of the three-phase inverter under various operating conditions, based on the proposed strategy, in the MATLAB/Simulink environment, is evaluated and experimentally demonstrated.