Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Generalized Circulating Current Control Method in Parallel Three-Phase Boost Converters
Authors Chang-Soon Lim ; 李Kui-Jun Lee ; Rae-Young Kim ; Dong-Seok Hyun
DOI 10.6113/TKPE/2011.16.3.250
Page pp.250-257
ISSN 1229-2214
Keywords Three-phase coupled inductor; Circulating current; Parallel three-phase boost converters.
Abstract This paper analyzes characteristic of the three-phase coupled inductor connected to ac source to effectively mitigate the high-frequency circulating current generated in parallel three-phase boost converters. The three-phase coupled inductor analysis presented in this paper uses the three-phase coupled inductor structure and voltage equations. Based on this analysis, the three-phase coupled inductor is added to the conventional low-frequency averaged model. As a result, the novel averaged model which can reduce the low and high-frequency circulating current simultaneously is developed. Using the zero-sequence component of the novel averaged model, each total inductance to the circulating current of the three-phase coupled inductor and line inductor can be obtained. Simulation and experiment results verify the usefulness of three-phase coupled inductor in parallel three-phase boost converters.