A New SVPWM Modulated Input Switched Multilevel Converter for Grid-Connected PV Energy Generation Systems

作者：Li Xiong^*; Dusmez Serkan; Prasanna Udupi Rajagopal; Akin Bilal; Rajashekara Kaushik

来源：IEEE Journal of Emerging and Selected Topics in Power Electronics, 2014, 2(4): 920-930.

DOI：10.1109/JESTPE.2014.2358590

• Multilevel converters
• renewable energy systems
• space vector pulsewidth modulation (SVPWM)

This paper proposes a new space vector pulsewidth modulation (SVPWM) strategy for a hybrid input switched multilevel converter for photovoltaic energy generation systems. The converter topology is a cascaded connection of input switched and H-bridge converters, which can provide 2N + 1 voltage levels for each phase. The proposed SVPWM strategy treats the multilevel converter as a two-level converter by introducing an offset vector. With a generated switching pattern, it is possible to obtain minimum number of switching-state transitions and switch the H-bridge close to line frequency; thus, the switching losses can be significantly reduced. The proposed SVPWM strategy has been realized on a seven-level converter to demonstrate the principle of operation. The advantages of the proposed scheme and architecture are verified by both simulation and experimental results.

• 出版日期2014-12