الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The installation and usage of wind power plant has significantly increased since several years due to the recent necessity of creating renewable, sustainable and clean energy sources. However, wind power is intermittent due to worst case weather conditions such as an extended period of overcast skies or when there is no wind for several weeks. As a result, wind power generation is variable and unpredictable.The hybrid wind power with diesel generation has been suggested to handle the problem above. A hybrid wind diesel system is very reliable because the diesel acts as a cushion to take care of variation in wind speed and would always maintain an average power equal to the set point. Typically, most of the hybrid wind diesel system is located at remote places or offshore where the power grid is usually long and weak characterized by under voltage condition. Because of the limited reactive power capability, wind turbine system cannot always supply required reactive power; as a result, its terminal voltage fluctuates. Hence, a voltage regulation device is required for the secure operation of the overall wind turbine together with power grid during normal operation as well as disturbances in the grid.Flexible ac transmission system (FACTS) devices, through their fast, flexible, and effective control capability, provide solution to this challenge. Therefore, this thesis examines the use of Static Synchronous Compensator (STATCOM) at the Point of Common Coupling (PCC) to regulate terminal voltage of the hybrid wind diesel system.Static Synchronous Compensator (STATCOM) is a device capable of solving the power quality problems at the power system. These problems happen in milliseconds and because of the time limitation; it requires the STATCOM that has continuous reactive power control with fast response. In this way, optimal exploitation of STATCOM by classical controllers has been a controversial issue in reputable journals. One of the most common controlling devices in the market is the Proportional-Integral (PI) controller and the Genetic Algorithm (GA) is introduced. Genetic algorithm is employed to find the best values for PI controller parameters in a very short time. These methods are tested in MATLAB, and their results are obtained.This thesis investigates the use of a Static Synchronous Compensator (STATCOM) along with hybrid wind diesel system for the purpose of stabilizing the grid voltage after grid-side disturbances. The strategy focuses on a fundamental grid operational requirement to maintain proper voltages at the point of common coupling by regulating generation voltage.Control schemes to enhance stability in a hybrid wind diesel power system have been proposed by much researchers in the previous work. Firstly: The blade pitch controller (BPC) used Proportional-Integral-Derivative (PID) controller in the wind side tuned in order to improve dynamic stability is studied. Secondly: Optimal tuning of STATCOM control parameters is very important in order to proper performance of STATCOM as a stabilizer. To select the best value for PID in BPC and PI in STATCOM parameters, integral of absolute magnitude of the error (IAE) criterion as objective function is introduced then optimization process is done by genetic algorithm with the presence of a normal and abnormal conditions.Designing of a transient fault ride-through controller, controlling active and reactive power are another goals of the work.Nowadays there are different types of the hybrid wind diesel system, and different types of generators, these types are connected in parallel with each other and connected to isolated load or connected directly to the main grid. Finally A laboratory model of the wind energy conversion system is designed and constructed. Current controlled DC motor work as a wind turbine, three-phase synchronous generator, single-phase converter, transducers and digital computer system were used in the construction of the system. The performance of the experimental model is evaluated in a wide range of operating conditions. from the experimental and theoretical results, it is concluded that, with using the proposed control technique, the system becomes more stable and can through the transient faults.