Mahmoud M. Elkholy

Optimal active and reactive power control of wind turbine driven DFIG using TLBO algorithm and artificial neural networks

This paper investigates the optimal active and reactive power control capabilities for typical wind turbine (WT) driven doubly fed induction generator (DFIG). The main objective is to determine the optimal rotor voltage to extract certain active and reactive power from the DFIG over wide ranges of wind speed. Teaching learning-based optimisation (TLBO) algorithm is a new heuristic optimisation technique, used to obtain the optimum rotor voltages to achieve reference active and reactive powers overall operating points. Artificial neural network (ANN) controller is used as an adaptive controller to predict the value of rotor voltage for all operating points. The ideal power curve of a 2 MW wind turbine has been estimated to design the active power controller. The stator reactive power control capability with the range of ±1.6 MVAR is developed. With the proposed control strategy, the DFIG-based wind farm provides maximum power point tracking (MPPT), fully active and reactive powers control. For all operated wind speeds, the adaptive proposed controller develops useful network support compared to the conventional DFIG-based wind farm. The proposed system is developed in MATLAB/Simulink environment.

An investigation of IGBT open gate fault on field oriented control of induction motor drive system

This paper introduces a performance analysis of indirect rotor field oriented control of three phase induction motor drive system under one IGBT open gate fault of the inverter. The performance characteristics of the drive are investigated under healthy operating condition and at faulty condition with IGBT of upper phase leg is opened. The Total Harmonic Distortion of phases current in case opened IGBT are derived. The Simulation of the case study is carried out by using the Matlab/Simulink package on 1.1 kW, 220/380V, 50 Hz three phase induction motor. Keywords— Induction Motor Drive, Current control Voltage Source Inverter (CCVSI), Three Phase Inverter (FSTPI), Insulated Gate Bipolar Transistor (IGBT)