Sharing of nonlinear load in parallel-connected three-phase converters

Uffe Borup, Frede Blaabjerg, Prasad N. Enjeti

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Abstract

In this paper, a new control method is presented which enables equal sharing of linear and nonlinear loads in three-phase power converters connected in parallel, without communication between the converters. The paper focuses on solving the problem that arises when two converters with harmonic compensation are connected in parallel. Without the new solution, they are normally not able to distinguish the harmonic currents that flow to the load and harmonic currents that circulate between the converters. Analysis and experimental results on two 90-kVA 400-Hz converters in parallel are presented. The results show that both linear and nonlinear loads can be shared equally by the proposed concept.
Original languageEnglish
JournalIEEE Transactions on Industry Applications
Volume37
Issue number6
Pages (from-to)1817-1823
Number of pages7
ISSN0093-9994
DOIs
Publication statusPublished - 2001

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