الفهرس 
CHAPTER (1): INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Voltage control is considered one of the basic operational requirements of lectrical power systems; both at distribution and transmission levels. It continues to attract the attention of researchers to improve and/or develop new voltage control techniques particularly to accommodate distributed generation, extend the operational margin of stability and improve system performance. Also, voltage instability of power systems is becoming a more and more serious problem with the ever-increasing utilization and load of existing transmission systems.
The objectives of this thesis are:
1-Study the effect of applying the high side voltage controller on:
a- Transient performance of the system.
b- The system Voltage stability in the steady-state.
2-Analyze the system performance using damping and synchronizing torques as a quantitative measure when applying conventional controllers and with
applying the HSVC. The system considered is a single-machine-infinite bus arrangement.
Firstly, the performance of the generator is studied when using conventional controllers such as Automatic Voltage Regulator and Power System Stabilizer. Then, the High Side Voltage Controller is used. High side voltage control (HSVC) provides an effective approach to stabilize a power system over a wide range of operating conditions. HSVC approach deals with uncertainties introduced by variations of operating conditions and in this way, it guarantees system robustness to disturbances under various operating conditions. The system is simulated by its detailed non-linear model using the MATLAB Simulink. The simulation results for the system when subjected to several types of disturbances such as symmetrical three-phase short circuit at the transformer high voltage side and 10% step increase in the mechanical input are presented in comparative form to assure the effectiveness of the HSVC over conventional control systems. The performance of the system with various controllers is analyzed using the concept of damping and synchronizing torques. The effects of system loading, parameters, controllers gain on these torques are shown and discussed.
The results are confirmed with that obtained by non-linear transient simulation.