Abstract
The brushless doubly fed induction generator (BDFIG) has the potential to be employed as a variable speed wind turbine generator. Owing to brushless configuration of this generator, its reliability is higher than DFIG. Most of the grid faults are unsymmetrical. Hence, this paper analyzes dynamic behavior of BDFIG under symmetrical and unsymmetrical faults and presents dynamic models for both fault types. In order to validate the results of analysis, simulations have been carried out using MATLAB/Simulink software. Then, the control winding (CW) current is compared under symmetrical and unsymmetrical faults.
Highlights
INTRODUCTIONThe evolution of technology related to wind systems industry leaded to the development of variable speed wind turbines that present advantages compared to the fixed speed wind turbines
The evolution of technology related to wind systems industry leaded to the development of variable speed wind turbines that present advantages compared to the fixed speed wind turbines.Thereupon, connection of wind farms to grid and analysis and improvement of their dynamic behavior regarding new grid codes have become important issues [1, 2].The low-voltage ride-through capability of wind turbines with doubly-fed induction generators (DFIGs) has been widely studied in literature e.g. [3,4,5].analysis is based on a simplified vector model developed for the brushless doubly fed induction generator (BDFIG) with a nested-loop type of rotor in LVRT under three phase voltage dip [10, 11].2
Dynamic performance of BDFIG is presented in different types of faults and the simulation results are used to validate the analysis
Summary
The evolution of technology related to wind systems industry leaded to the development of variable speed wind turbines that present advantages compared to the fixed speed wind turbines. Thereupon, connection of wind farms to grid and analysis and improvement of their dynamic behavior regarding new grid codes have become important issues [1, 2]. The low-voltage ride-through capability of wind turbines with doubly-fed induction generators (DFIGs) has been widely studied in literature e.g. Analysis is based on a simplified vector model developed for the BDFIG with a nested-loop type of rotor in LVRT under three phase voltage dip [10, 11]
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