Stochastic Distribution Controller for Wind Turbines with Doubly Fed Induction Generator
DOI:
https://doi.org/10.13052/dgaej2156-3306.3544Keywords:
PI controller, probability distribution, reactive power control, stochastic processes, wind turbine.Abstract
The major purpose of this work is to design the controllers for controlling the
variable speed, variable pitch wind turbine (WT) with doubly fed induction
generator (DFIG). Vector control strategy is adopted for controlling the
DFIG active and reactive power. Generator torque is control to provide the
regulated real power with minimum fluctuation. The fixed gain proportional-
integral (PI) controller designed to the converter of rotor side and grid
side has limited operating range and inherent overshoot. Gain scheduling
PI controller is designed to minimize the overshoot and fluctuation exists
in proportional-integral controller. Since DFIG based wind energy conver-
sion system (WECS) works in uncertain wind speed, stochastic distribution
control (SDC) method is proposed to control the probability distribution
function (PDF) of DFIG based WECS. It copes with nonlinearities in the
WECS and contiguous variations at operating point and provides satisfactory
performance for the whole operating region. It improves the performance
together with power quality of generated electric power thereby maximizing the lifespan of installation and ensures secure and acceptable operation of the
DFIG based WECS.
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