The one-line diagram of a three-phase system is shown in Figure 1. By selecting a common based of 100 MVA and 32.75 kVon the generator bus,(a)Calculate all impedances including the load impedance in per-unit.Motor90 MVA33/275 kV90 MVA275/11kV55 MVA10.95 kvXT12%Xrg=12%X15%Generator95 MVA32.75 kvXg+15%2x OH Line 138 kmR= 0.01 ohm/kmX = 0 05 chm/kmLoad35 MVA10.95 kV0.88 pf laggingFigure 1V81V82=V83=Z81 =%3DZ82 =ZB3 =XG (new) =XT1 (new) =XT2(new) =ZOH =Хм (пеw)ZLoad =

Given, Common base power, SB = 100 MVA Base voltage = 32.75 KV

he one-line diagram of a three-phase system is shown in Figure 1. By selecting a common based of 100 MVA and 32.75 kV un the generator bus, ») Calculate all impedances including the load impedance in per-unit. Motor 55 MVA 90 MVA 90 MVA 275/11ky Xry-12% 33/275 kV 10.95 kv X15% Generator 95 MVA 32.75 kv Xg+15% 2x OH Line 138 km Load R=0.01 ohmkm 35 MVA 10.95 kV 0.88 pf laggng X=0 05 chmkm Figure 1 B1 B2= B3= B1 = B2 = B3 = G (new)= T1 (new) = T2 (new) = DH = M (new) = Load =

he one-line diagram of a three-phase system is shown in Figure 1. By selecting a common based of 100 MVA and 32.75 kV un the generator bus, ») Calculate all impedances including the load impedance in per-unit. Motor 55 MVA 90 MVA 90 MVA 275/11ky Xry-12% 33/275 kV 10.95 kv X15% Generator 95 MVA 32.75 kv Xg+15% 2x OH Line 138 km Load R=0.01 ohmkm 35 MVA 10.95 kV 0.88 pf laggng X=0 05 chmkm Figure 1 B1 B2= B3= B1 = B2 = B3 = G (new)= T1 (new) = T2 (new) = DH = M (new) = Load =

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

Single Phase AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

Question

The one-line diagram of a three-phase system is shown in Figure 1. By selecting a common based of 100 MVA and 32.75 kV
on the generator bus,
(a)
Calculate all impedances including the load impedance in per-unit.
Motor
90 MVA
33/275 kV
90 MVA
275/11kV
55 MVA
10.95 kv
XT12%
Xrg=12%
X15%
Generator
95 MVA
32.75 kv
Xg+15%
2x OH Line 138 km
R= 0.01 ohm/km
X = 0 05 chm/km
Load
35 MVA
10.95 kV
0.88 pf lagging
Figure 1
V81
V82=
V83=
Z81 =
%3D
Z82 =
ZB3 =
XG (new) =
XT1 (new) =
XT2
(new) =
ZOH =
Хм (пеw)
ZLoad =

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