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Title: An integrated nine-switch power conditioner for power quality enhancement and voltage sag mitigation
Authors: Zhang, Lei
Loh, Poh Chiang
Gao, Feng
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2011
Source: Zhang, L., Loh, P. C., & Gao, F. (2011). An Integrated Nine-Switch Power Conditioner for Power Quality Enhancement and Voltage Sag Mitigation. IEEE Transactions on Power Electronics, 27(3), 1177-1190.
Series/Report no.: IEEE transactions on power electronics
Abstract: A nine-switch power converter having two sets of output terminals was recently proposed in place of the traditional back-to-back power converter that uses 12 switches in total. The nine-switch converter has already been proven to have certain advantages, in addition to its component saving topological feature. Despite these advantages, the nine-switch converter has so far found limited applications due to its many perceived performance tradeoffs like requiring an oversized dc-link capacitor, limited amplitude sharing, and constrained phase shift between its two sets of output terminals. Instead of accepting these tradeoffs as limitations, a nine-switch power conditioner is proposed here that virtually “converts” most of these topological short comings into interesting performance advantages. Aiming further to reduce its switching losses, an appropriate discontinuous modulation scheme is proposed and studied here in detail to doubly ensure that maximal reduction of commutations is achieved. With an appropriately designed control scheme then incorporated, the nine-switch converter is shown to favorably raise the overall power quality in experiment, hence justifying its role as a power conditioner at a reduced semiconductor cost.
ISSN: 0885-8993
DOI: 10.1109/TPEL.2011.2115256
Rights: © 2011 IEEE
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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