A three-phase Y-A transformer is rated at 225 kV:24kV, 400 MVA and has a series reactance of 11.7 2 as referred to its high-voltage terminals. The transformer is supplying a load of 325 MVA, with 0.93 power factor lagging at a voltage of 24 kV (line-to-line) on its low voltage side. It is supplied from a feeder whose impedance is 0.11 + j2.2 2 connected to its high-voltage terminals. For these conditions, calculate: a) Line-to-line voltage at the high-voltage terminal of the transformer b) Line-to-line voltage at the sending end of the feeder

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2. A three-phase Y-A transformer is rated at 225 kV:24kV, 400 MVA and has a series
reactance of 11.7 2 as referred to its high-voltage terminals. The transformer is supplying
a load of 325 MVA, with 0.93 power factor lagging at a voltage of 24 kV (line-to-line) on
its low voltage side. It is supplied from a feeder whose impedance is 0.11 + j2.2
connected to its high-voltage terminals. For these conditions, calculate:
a) Line-to-line voltage at the high-voltage terminal of the transformer
b) Line-to-line voltage at the sending end of the feeder
Transcribed Image Text:2. A three-phase Y-A transformer is rated at 225 kV:24kV, 400 MVA and has a series reactance of 11.7 2 as referred to its high-voltage terminals. The transformer is supplying a load of 325 MVA, with 0.93 power factor lagging at a voltage of 24 kV (line-to-line) on its low voltage side. It is supplied from a feeder whose impedance is 0.11 + j2.2 connected to its high-voltage terminals. For these conditions, calculate: a) Line-to-line voltage at the high-voltage terminal of the transformer b) Line-to-line voltage at the sending end of the feeder
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