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A Three-Level Soft-Switching Active Power Filter with DC Self-Balancing Capability
Lok I.-K.; Dai N.-Y.; Wong M.-C.
2011-11
Source PublicationInternational Review of Electrical Engineering
ISSN1827-6660
Volume6Issue:7Pages:2883-2892
Abstract

The three-level neutral-point-clamped (NPC) inverter was applied in active power filters (APFs). The three-level NPC inverter has the structure of split dc capacitors. So the existing dc neutral point can be directly utilized as the ground return in a three-phase four-wire system. DC bus voltage unbalance has been one of the major problems of three-level NPC inverters. In addition, high voltage and current stresses during switching cause higher system losses and lower efficiency. In this paper, a generalized three-level quasi-resonant dc-link (QRDCL) inverter is proposed, which has both the soft-switching and dc voltage self-balancing capabilities. The switching sequence for all the power switches in the proposed three-level QRDCL inverter is designed. The inverter is controlled by the 3-dimensional direct pulse width modulation with embedded auxiliary switches triggering. The proposed generalized three-level QRDCL inverter is applied in a three-phase four-wire APF. Simulation results and experimental results verified that the proposed system can achieve dc-link balance and switching losses reduction simultaneously. The efficiency of the proposed active power filter is improved and the high voltage stress during switching is released. © 2011 Praise Worthy Prize S.r.l. - All rights reserved.

KeywordActive Filters Dc Unbalance Quasi-resonant Dc-link Soft-switching Template
URLView the original
Indexed BySCI
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000300470400006
PublisherPRAISE WORTHY PRIZE SRL, PIAZZA G D ANNUNZIO, NAPOLI, 15-I80125, ITALY
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
AffiliationUniv Macau, Dept Elect & Comp Engn, Macao, Peoples R China
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Lok I.-K.,Dai N.-Y.,Wong M.-C.. A Three-Level Soft-Switching Active Power Filter with DC Self-Balancing Capability[J]. International Review of Electrical Engineering,2011,6(7):2883-2892.
APA Lok I.-K.,Dai N.-Y.,&Wong M.-C..(2011).A Three-Level Soft-Switching Active Power Filter with DC Self-Balancing Capability.International Review of Electrical Engineering,6(7),2883-2892.
MLA Lok I.-K.,et al."A Three-Level Soft-Switching Active Power Filter with DC Self-Balancing Capability".International Review of Electrical Engineering 6.7(2011):2883-2892.
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