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Control of shunt reactor inrush currents in the Hellenic-Interconnected Power System

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3 Author(s)
C. D. Tsirekis ; Hellenic Transmission Syst. Operator, Athens, Greece ; N. D. Hatziargyriou ; B. C. Papadias

Transients caused by shunt reactor switching have been an important parameter in the design of the relevant equipment (reactor, circuit breaker, insulation) of the Hellenic-Interconnected Power System. Next to the well-known damaging overvoltages produced by shunt reactor de-energization, high dc components of inrush currents with low damping factor have been observed during energization, resulting in excessive electromagnetic stresses to the windings and undesired activation of zero-sequence current relays. In the present study, inrush currents produced by shunt reactor energization are analyzed and the performance of the techniques used for their limitation is investigated.

Published in:

IEEE Transactions on Power Delivery  (Volume:20 ,  Issue: 2 )