Open AccessComplex vector modelling and sequence analysis of the integrated three‐phase rotating transformer for design of a symmetrical structure
Author(s) -
Mohabati Hamid Reza,
Moghani Javad Shokrollahi,
Boroujeni Samad Taghipour
Publication year - 2016
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2015.0503
Subject(s) - transformer , delta wye transformer , rotary variable differential transformer , linear variable differential transformer , equivalent circuit , electronic circuit , rotating reference frame , control theory (sociology) , reference frame , finite element method , voltage , distribution transformer , topology (electrical circuits) , electronic engineering , engineering , computer science , physics , electrical engineering , mechanics , frame (networking) , mechanical engineering , structural engineering , control (management) , artificial intelligence
In this paper, a complex vector model is provided for an integrated three‐phase shell‐type rotating transformer. The equivalent magnetic circuit is used to obtain the transformer parameters. Furthermore, using vector representation of the dq transformation, the voltage equations of the rotating transformer in double‐reference synchronous frame are obtained. Thanks to the developed model, the transformer design parameters are selected such that the voltage equations in double‐reference frames are decoupled. For the first time, the machine complex vector representation is exploited to design a symmetrical rotating three‐phase transformer. For this purpose, two separated equivalent circuits in double‐reference frames or two decoupled sequences networks are developed. The decoupled circuits simplify the analysis of the rotating transformer in the unbalanced conditions as well as balanced circuits. Being symmetrical is an important issue for the rotating transformer connected to the rotor winding of a doubly‐fed induction generator. Moreover, the steady‐state performance and sequence analysis of the rotating transformer are discussed. Finally, the validity of the obtained model and accuracy of the presented analysis are verified by finite element analysis and experimental tests.