Browsing by Author "BELAYNEH KAWATO HENTO"

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    IMPROVED FAULT RIDE THROUGH CAPABILITY OF DFIG -WIND TURBINES USING CUSTOMIZED DEVICE
    (Hawassa University, 2021-10-18) BELAYNEH KAWATO HENTO
    Expanding measure of wind turbines is associated with electrical power systems because of the ecological concern and mission of vitality security. One of the main concerns con nected to the high level penetration of the wind turbine integrated grid is power system stability problem. Consequently, the stable operation of wind power generation systems is very important for power system stability.To evaluate the dynamic performance of the power system with and without the dynamic voltage support from Dynamic Voltage Re storer (DVR) for a three phase short circuit fault at point of common coupling. The main goal of this proposition is to create models of DVR, and Crowbar security at Point of Common Coupling (PCC) to help Doubly Fed Induction Generator (DFIG) based wind farm during disturbances. The main concern is the Fault Ride Through (FRT) capacity of the system when the generator voltage drops to exceedingly low values because of short out fault and furthermore unexpected burden changes. Integrating FACTS keep the grid connected DFIG-based wind farm from going disconnected during and after the distur bance. DFIG is usually used to satisfy standard grid requirements such as stability of the grid, grid synchronization, power quality improvement, power control and fault ride through in grid tied wind energy system. The proposed system DVR and Crowbar pro tection rides through the fault by improving voltage guideline and prevents wind turbine termination during grid faults. The proposed system is applied on Ashegoda wind farm in Ethiopia as a case study and a test modeling and simulation have been acted in Mat Lab/Simulink programming version 9.4