Transient Recovery Voltage Behind Transformer: Calculation and Measurement

Sabot, A.

doi:10.1109/mper.1985.5528493

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Transformer Limited Fault (Tlf)1

Trv Calculation1

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2011

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(2 citation statements)

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“…(4) The reference [14] mentions the relationship between amplitude factor and TRV frequency. According thereto, the amplitude factor is 1.4 at the frequency of 40kHz.…”

Section: Transformer Limited Fault (Tlf)mentioning

confidence: 99%

See 1 more Smart Citation

TRV under transformer limited fault condition and frequency-dependent transformer model

Koshizuka

Nakamoto

Haginomori

et al. 2011

2011 IEEE Power and Energy Society General Meeting

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The TRV amplitude factors of 4kVA and 300kVA transformers under transformer limited fault conditions were measured. The measured factors were 1.4 and were lower than the IEC standard. The frequency response of the transformer impedance was investigated using a frequency response analysis (FRA). FRA measurement graphs showed that the short-circuit inductance value of test transformers gradually decreases along with frequency. From this result, a frequency dependent transformer model was constructed. Simulated frequency response of transformer impedance was in good agreement with measured values. Simulated amplitude factor using frequencydependent transformer model was 1.5 and is good agreement with measured values.Index Terms--transformer limited fault, transient recovery voltage, frequency response analysis, transformer equivalent circuit.

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“…(4) The reference [14] mentions the relationship between amplitude factor and TRV frequency. According thereto, the amplitude factor is 1.4 at the frequency of 40kHz.…”

Section: Transformer Limited Fault (Tlf)mentioning

confidence: 99%

“…The reference [14] describes the TRV amplitude factor when the frequency of injected current is changed with regard to the use of the current injection method. Accordingly, the TRV amplitude factor rises as the frequency of the injected current increases.…”

Section: Trv Calculationmentioning

confidence: 99%