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A PWM strategy for four-leg voltage source converters and applications to a novel line interactive UPS in a three-phase four-wire system

A four-leg pulse width modulation (PWM) voltage source converter (VSC) is used to supply three phase balanced voltage even under an unbalanced load condition in three phase four wire power distribution network. A novel carrier-based modulation technique for the converter is described with the concep...

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Main Authors:	Jang-Hwan Kim, Sul, Seung-Ki, Hyosung Kim, Jun-Keun Ji
Format:	Conference Proceeding
Language:	English
Subjects:	Applied sciences Convertors Electrical engineering. Electrical power engineering Electrical machines Electrical power engineering Exact sciences and technology Miscellaneous Phase modulation Power conversion Power electronics, power supplies Power networks and lines Power systems Pulse width modulation Pulse width modulation converters Regulation and control Switching converters Switching loss Uninterruptible power systems Voltage Wire
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creator	Jang-Hwan Kim Sul, Seung-Ki Hyosung Kim Jun-Keun Ji
description	A four-leg pulse width modulation (PWM) voltage source converter (VSC) is used to supply three phase balanced voltage even under an unbalanced load condition in three phase four wire power distribution network. A novel carrier-based modulation technique for the converter is described with the concept of an offset voltage and also is extended to so called 'discontinuous PWM (DPWM)' to minimize switching losses of VSC. As a practical application example of the four-leg VSC, a line interactive uninterruptible power supply (UPS) system is chosen. The feasibility of the proposed PWM strategies and control algorithms has been verified by the simulation and experimental results.
doi_str_mv	10.1109/IAS.2004.1348782
format	conference_proceeding
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identifier	ISSN: 0197-2618
ispartof	Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting, 2004, Vol.4, p.2202-2209 vol.4
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source	IEEE Electronic Library (IEL) Conference Proceedings
subjects	Applied sciences Convertors Electrical engineering. Electrical power engineering Electrical machines Electrical power engineering Exact sciences and technology Miscellaneous Phase modulation Power conversion Power electronics, power supplies Power networks and lines Power systems Pulse width modulation Pulse width modulation converters Regulation and control Switching converters Switching loss Uninterruptible power systems Voltage Wire
title	A PWM strategy for four-leg voltage source converters and applications to a novel line interactive UPS in a three-phase four-wire system
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