Abstract:The transient recovery voltage (TRV) associated with power-transformer terminal faults is essential for correctly applying circuit breakers. Because presently used methods only allow for roughly estimating an equivalent single TRV ringing frequency, more accurate but inexpensive methods are needed. The novel method presented in this paper employs frequency response analysis (FRA) for measuring the transformer's complex short circuit impedance . From that, the frequency spectrum of the TRV is approximated by th… Show more
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