Doubly-fed Induction Generator Connected to Distribution Systems
Date Issued
2010
Date
2010
Author(s)
Lee, Long-An
Abstract
Dynamic performance of a doubly-fed induction generator(DFIG) connected to a distribution system is investigated in this thesis using a back-to-back converter tocontrol the doubly-fed induction generator. Two major topics are covered in this
study. One is the effect of a disturbance in the power system on the dynamicperformance of the DFIG. The other is the maximum power point tracking(MPPT) ofthe DFIG under different wind speeds.
The characteristics of wind turbine and doubly-fed induction generator are first studied. Then the control block diagram for the DFIG is established. The real andreactive power outputs of the DFIG are controlled by a back-to back converter using aPI controller and the pulse width modulation(PWM) technology.
Dynamic simulations for the system subject to disturbances such as load changes
and wind speed variations are conducted MATLAB○R/Simulink/SimPowerSystems. It is concluded from the simulation results that stator voltage can be effectively regulated and maximum power can be extracted from the wind turbine by theproposed DFIGcontroller.
Subjects
wind energy conversion
duubly-fed induction generator
distribution systems
maximum power point tracking
back-to-back converter
pulse width modulation
Type
thesis
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