Browsing by Author "Boutora, S. (Supervisor)"

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    Mitigating ferroresonance in MV power system involving power transformer and circuit breaker capacitance using alternating transient program
    (2016) Bedda, Zekri Sad; Mekkaoui, Tarek; Boutora, S. (Supervisor)
    Ferroresonance is a phenomenon usually initiated by transients in power networks resulting from switching operations or ground faults or others. Nonlinear behavior of the core of a power transformer results in magnetic saturation. Long-lasting ferroresonant state is dangerous to the equipment due to prolonged overvoltage and large overcurrents in MV windings. In this thesis, a ferroresonance solution using Alternating Transient Program, was attempted. The ferroresonant oscillations analyzed result from interaction between the power transformer and a grading capacitance of a circuit breaker. Some practical solutions are suggested and introduced after creating a ferroresonance situation, they had a considerable effect on damping and eliminating the risk of ferroresonance.