Q2. A single-phase power system is shown in Figure P2-1. The power source feeds a 100-kVA 14/2.4-kV transformer through a feeder impedance of 38.2 + j140 2. The transformer's equivalent series impedance referred to its low-voltage side is 0.10 + j0.4 N. The load on the transformer is 90 kW at 0.8 PF lagging and 2300 V. 0.100 j0.40n Load 90 kW Joso PF lagging Souce Feeder Trandomer Load (transmiion line) FIGURE P2-1 (a) What is the voltage at the power source of the system? (b) What is the voltage regulation of the transformer? (c) How efficient is the overall power system?

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Q2.
A single-phase power system is shown in Figure P2-1. The power source feeds a 100-kVA 14/2.4-kV
transformer through a feeder impedance of 38.2 + j140 2. The transformer's equivalent series impedance
referred to its low-voltage side is 0.10 + j0.4 2. The load on the transformer is 90 kw at 0.8 PF lagging
and 2300 V.
38.20 j140n
0.100 j0.40n
Load
90 kW
0.80 PF lagging
Vpron
Source
Feeder
Transformer
Load
(transmission line)
FIGURE P2-1
(a) What is the voltage at the power source of the system?
(b) What is the voltage regulation of the transformer?
(c)
How efficient is the overall power system?
Transcribed Image Text:Q2. A single-phase power system is shown in Figure P2-1. The power source feeds a 100-kVA 14/2.4-kV transformer through a feeder impedance of 38.2 + j140 2. The transformer's equivalent series impedance referred to its low-voltage side is 0.10 + j0.4 2. The load on the transformer is 90 kw at 0.8 PF lagging and 2300 V. 38.20 j140n 0.100 j0.40n Load 90 kW 0.80 PF lagging Vpron Source Feeder Transformer Load (transmission line) FIGURE P2-1 (a) What is the voltage at the power source of the system? (b) What is the voltage regulation of the transformer? (c) How efficient is the overall power system?
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