Open AccessMagnetic equivalent circuit modelling of doubly‐fed induction generator with assessment of rotor inter‐turn short‐circuit fault indices
Author(s) -
Faiz Jawad,
Moosavi Seyed M.M.,
Abadi Mohsen B.,
Cruz Sérgio M.A.
Publication year - 2016
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
eISSN - 1752-1424
pISSN - 1752-1416
DOI - 10.1049/iet-rpg.2016.0189
Subject(s) - stator , rotor (electric) , control theory (sociology) , converters , matlab , fault (geology) , induction generator , generator (circuit theory) , power (physics) , ac power , equivalent circuit , grid , doubly fed electric machine , engineering , computer science , control (management) , electrical engineering , physics , voltage , mathematics , quantum mechanics , artificial intelligence , seismology , geology , geometry , operating system
In this study, a wound rotor induction machine, as the core of a doubly‐fed induction generator (DFIG) system, is modelled using the magnetic equivalent circuit approach. The entire DFIG system is implemented in Matlab/Simulink environment, including the machine model, power converters, control system and the grid. The model, which includes the ability to simulate rotor inter‐turn short‐circuits (RITSCs), is subsequently used for the investigation and comparison of the impact of this fault in several DFIG quantities, namely in the stator current and in some control variables. This research also deals in detail with the differences found when comparing RITSC and unbalanced rotor resistance (URR) faults. It is observed that on the contrary to the URR, the stator current spectrum is more appropriate than the control signals for the detection of RITSC. Simulation and experimental results obtained with a DFIG system operating at sub‐synchronous and super‐synchronous speeds, for different values of the active and reactive powers injected into the grid, corroborate the findings reported in this study.