Abstract
The paper presents the transient behavior of the doubly fed induction generator (DFIG) in the wind turbine (WT) in the normal and voltage dip condition. When voltage dip occurs in to the grid, the rotor current increases and the DC-link voltage increases too and start to oscilate. In this paper, the proportional integral (PI) controllers are used to control the DFIG-basedwind farms for regulating the electronic devices including rotor side converter (RSC) and grid side converter (GSC) to control the active and reactive power of DFIG. The PI parameters are tuned by imperialist competitive algorithm (ICA). So, the transient behavour of the DFIG-based WF is explors when the voltage dip occurs. Hence, the induced electric motive force in to the rotor is measured. Also, an existed uncertainty for mutual inductance is considered caused by saturated curve during three-phase fault conditions and the bahavour of DFIG-based WT is examined and analyzed. All of simulation is done by Matlab/Simulink®.
Highlights
Wind energy is growing fast for generating electricity because it is an important source of renewable energy resources [1]
When a voltage dip occurs in the doubly fed induction generator (DFIG)-based wind turbine (WT), two major issues are happened in the DFIG-based WT
For finding the influences of the saturation curve of the DFIG, a three-phase fault occurs into the grid causing a voltage dip in point of common coupling (PCC) of the DFIG
Summary
Wind energy is growing fast for generating electricity because it is an important source of renewable energy resources [1]. Many of research activities have focused on the impact of the disturbances on the DFIG-based WT in the fault conditions They have proposed using a DC chopper to smooth DC link overvoltage and a crowbar resistor to suppress rotor overcurrent as the first solution in VD conditions [7]. This paper presents effects a voltage dip event on the rotor and stator of the DFIG It proposes a very simple control strategy using PI controllers to regulate and drive the RSC and GSC. Normal condition By reducing DFIG terminal voltage, the stator flux changes and large electromotive force (about 3 to 4 times the nominal value) is induced in the rotor winding. This phenomenon ca n be explained as follows.
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