الفهرس 
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Abstract
This thesis aims to analyze, simulate and implement a voltage oriented control VOC pulse width modulation PWD bridge rectifier system, with controllable power factor and sinusoidal supply current. The system is based on controlling the standard three-phase six-switch insulated-gate bipolar transistor IGBT bridge, by applying the voltage oriented control strategy using the space vector modulation CVM technique. This system introduces negligible harmonic pollution in supply current and has the capability of controlling the power factor with bidirectional power flow. This system can replace the conventional rectifier system in large number of applications, eliminating the problems normally associated with them.
A detailed survey of the conventional converter topologies have been reviewed and different methods of harmonic reduction and power factor improvement are presented.
A mathematical model of the selected converter topology is analysed in detail and is investigated with three types of controllers. To study the different performance characteristics of the open-loop and the closed-loop system, using conventional PI controllers, hysteresis current controllers and fuzy logic controllers, MATLAB/SIMULINK software package is used for the simulation of these systems.
Effects of the system parameters namely: the amplitude modualtion index m and the power angle δ of the PWM rectifier and the hysteresis band width HB on the performance of both systems are investigated in both modes of operation; the rectifying mode and the inverting mode.