Browsing by Author "ELIAS EJIGU"

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    TRANSIENT STABILITY IMPROVEMENT OF DOUBLY FED INDUCTION GENERATOR-BASED VARIABLE SPEED WIND ENERGY CONVERSION SYSTEM USING FLSTATCOM
    (Hawassa University, 2023-10-21) ELIAS EJIGU
    The "doubly fed induction generator (DFIG)" is the most extensively utilized technology for wind power generation because of its adaptability to changing wind speeds and ability to capture more wind energy. However, issues like transient stability posed hurdles for the grid because wind energy has a fluctuating nature, faults, load fluctuations occur, and electronic devices are required to connect wind turbine generators to the grid. Capacitor banks are used in the research region to address the aforementioned issues and improve the variable-speed wind production system's transient stability. The investigation shows that the capacitor banks are incapable of maintaining the grid code during any kind of network fault. This demonstrates how crucial it is to use FACTS devices to increase the wind-generating system's transient stability. In this dissertation, a shunt flexible alternative current transmission system device called a static synchronous compensator (STATCOM) can offer technical solutions to enhance the overall performance of wind energy conversion systems through the creation of a suitable controller. The Thesis also presents the STATCOM control system and its effectiveness. ANFIS-controlled STATCOM is examined in this Thesis before being compared to that of STATCOM controlled by fuzzy logic. The adaptive ANFIS control approach is faster to speed control, better at responding to voltage fluctuations, and better at tracking the reactive current reference, according to simulations performed using MATLAB on grid-connected DFIG systems. Finally, the ANFIS based STATCOM is critical in assuring the stability of power systems in the case of large disruptions and break down