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Newton-Raphson approach for the analysis of ferroresonant circuits

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2 Author(s)
Naidu, S.R. ; Univ. Federal da Paraiba, Joao Pessoa, Brazil ; de Souza, B.A.

During switching operations in a power system there is a possibility that an unloaded transformer may be energised by a voltage source through an intervening capacitor. The capacitor could be a stray capacitance between an energised transmission line and the transformer terminals, a capacitance between the open contacts of a circuit breaker or a capacitive divider of a capacitive voltage transformer. The series connection of an alternating voltage source, a linear capacitor and a saturable inductor is generally known as a ferroresonant circuit. Determination of the steady-state periodic responses of a ferroresonant circuit is described. The responses were obtained using a time-domain Newton-Raphson procedure and also using a hybrid technique. A continuation procedure is described for determining the multiple solutions of the ferroresonant circuit and the bifurcating solution branches

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Generation, Transmission and Distribution, IEE Proceedings-  (Volume:144 ,  Issue: 5 )