A single-phase power system is shown as the equivalent circuit below. The system has a 480V generator connected to an ideal 1:10 step-up transformer (no losses), a transmission line, an ideal 20:1 step-down transformer and a load all in series as shown. The resistance of the transmission line is 20 S2 and the reactance j60 , a load is connected to the system with an impedance of 10/30° №. For the analysis of the system, use base values of 10 kVA and 480 V at the generator, find (a) per unit values of all impedances, (b) per unit current, (c) load power (W), (d) power loss (W). VG 480 0⁰ V 10 kVA Zone 1 1:10 20 Ω j60 Ω ZL Zone 2 20:1 ILoad Zone 3 ZLoad 10/30° Ω
A single-phase power system is shown as the equivalent circuit below. The system has a 480V generator connected to an ideal 1:10 step-up transformer (no losses), a transmission line, an ideal 20:1 step-down transformer and a load all in series as shown. The resistance of the transmission line is 20 S2 and the reactance j60 , a load is connected to the system with an impedance of 10/30° №. For the analysis of the system, use base values of 10 kVA and 480 V at the generator, find (a) per unit values of all impedances, (b) per unit current, (c) load power (W), (d) power loss (W). VG 480 0⁰ V 10 kVA Zone 1 1:10 20 Ω j60 Ω ZL Zone 2 20:1 ILoad Zone 3 ZLoad 10/30° Ω
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Transcribed Image Text:A single-phase power system is shown as the equivalent circuit below. The
system has a 480V generator connected to an ideal 1:10 step-up transformer
(no losses), a transmission line, an ideal 20:1 step-down transformer and a load
all in series as shown.
The resistance of the transmission line is 20 S2 and the reactance j60 , a load
is connected to the system with an impedance of 10/30° №.
For the analysis of the system, use base values of 10 kVA and 480 V at the
generator, find (a) per unit values of all impedances, (b) per unit current, (c)
load power (W), (d) power loss (W).
NG
480 20⁰ V
10 kVA
Zone 1
1:10
20 Ω j60 Ω
ZL
Zone 2
20:1
ILoad
Zone 3
ZLoad
10/30° Ω
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