Browsing by Author "Bouchahdane, Mohamed (Supervisor)"

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    Design a protection scheme using ETAP
    (Université M’Hamed BOUGARA de Boumerdes : Institut de génie electrique et electronique (IGEE), 2023) Cheboub, Mohamed elbachir; Bouchahdane, Mohamed (Supervisor)
    This master report focuses on the design of a comprehensive protection scheme for industrial distribution systems, with a specific emphasis on the SCMI “GICA” factory. Using ETAP software, the report aims to develop and simulate an efficient protection scheme. The primary objective is to improve selectivity by replacing the definite time curve with the Inverse Definite Minimum Time (IDMT) curve, combining time selectivity and current-based methods. This approach effectively addresses challenges related to transient response and undesired tripping during high-current faults, particularly between successive short lines. Furthermore, the thesis proposes innovative solutions to mitigate the motor contribution during short circuits. The protection scheme design includes the meticulous selection and calibration of protective relays and current transformers (CTs) for various electrical elements such as transformers, motors, and busbars. Through extensive testing and validation using ETAP simulation, the proposed protection scheme and solutions demonstrate their effectiveness and reliability. This research significantly contributes to the field of industrial distribution system protection scheme design, particularly in terms of selectivity improvement, transient response handling, and motor contribution mitigation. The successful implementation and simulation of the proposed protection scheme highlight its practicality and efficiency in real-world applications. The findings provide valuable insights for professionals involved in designing protection schemes for similar industrial distribution systems.
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    Test and diagnostics of power transformers
    (2023) Smaya, Ammar; Dif, Mounir; Bouchahdane, Mohamed (Supervisor)
    Power transformers are critical components in the electrical power industry, and their proper functioning is crucial for the efficie nta ndreliab leoperati on oft hepower grid. To ensure the optimal performance and safety of power transformers, it is important to conduct both basic and advanced tests. This thesis provides an overview of the basic tests that are commonly performed on power transformers, including transformer turns ratio test, insulation resistance test and tan delta (TD) testing. These tests are essential for assessing the basic parameters of the transformer and ensuring that it is functioning within the expected range. In addition to basic tests, advanced tests are also performed to assess the performance of power transformers under more demanding conditions. These tests include sweep frequency response analysis (SFRA), partial discharge (PD) measurement, and Oil DGA test. These tests provide more detailed information on the condition of the transformer and can help to identify potential problems before they cause major failures. The thesis also discusses the importance of proper interpretation of the test results, which requires a thorough understanding of the transformer design and operation. It highlights the need for skilled technicians and engineers to conduct the tests and analyze the results accurately. In conclusion, this thesis emphasizes the importance of both basic and advanced tests for power transformers to ensure their proper functioning and prevent failures. The paper recommends that regular testing and maintenance should be performed on power transformers to prolong their service life and ensure the reliability of the power grid.