Capacitor Voltage Regulation in Single-DC-Source Cascaded H-Bridge Multilevel Converters Using Phase-Shift Modulation
Cascaded H-bridge multilevel power electronic converters generally require several dc sources. An alternative option is to replace all the separate dc sources feeding the H-bridge cells with capacitors, leaving only one H-bridge cell with a real dc voltage source. This will yield a cost-effective converter. However, the required capacitor voltage balancing is challenging. In this paper, using the phase-shift modulation approach, a new control method for cascaded H-bridge multilevel converters fed with only one independent dc source is presented. The proposed method has a wide voltage regulation range for the replacement capacitors in the H-bridge cells. Experimental and simulation results support the proposed control method.
H. Sepahvand et al., "Capacitor Voltage Regulation in Single-DC-Source Cascaded H-Bridge Multilevel Converters Using Phase-Shift Modulation," IEEE Transactions on Industrial Electronics, vol. 60, no. 9, pp. 3619-3626, Institute of Electrical and Electronics Engineers (IEEE), Sep 2013.
The definitive version is available at https://doi.org/10.1109/TIE.2012.2206335
Electrical and Computer Engineering
Keywords and Phrases
Bridge Circuits; Electric Inverters; Modulation; Phase Shift; Phase Shifters; Voltage Regulators; Capacitor Voltage Balancing; Capacitor Voltages; Cascaded H-Bridge Converter; Cascaded H-Bridge Multilevel Converters; DC Voltage Sources; H-Bridge Cells; Multilevel Converter; Phase Shift Modulation; Capacitors; Capacitor Voltage Regulation; H-Bridge Cell
International Standard Serial Number (ISSN)
Article - Journal
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01 Sep 2013