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For the power system shown at right the impedance matrix 2 is j0.5 j0.2 3 j0.4 0.145 0.120 0.0692 Zbus=j 0.120 0.246 0.101 | 0.0692 0.101 0.164 (3) j0.2 j0.25 Pre-fault all bus voltages are 1 pu. Then a three-phase fault to ground occurs at bus 3. What are the post-fault per-unit bus voltages? (Express in polar phasor form |V|Z0° ) ~) 1pu 1pu (~ V, = 0.578 Lo° V;= 0.384 L0° V;= %3D feuetot bus -j6.098 Z33 AVI 0.o692 0.4220 AV2 jG.098 (j) 0.101 0.l6159 D.164 %3D

For the power system shown at right the impedance matrix 2 is j0.5 j0.2 3 j0.4 0.145 0.120 0.0692 Zbus=j 0.120 0.246 0.101 | 0.0692 0.101 0.164 (3) j0.2 j0.25 Pre-fault all bus voltages are 1 pu. Then a three-phase fault to ground occurs at bus 3. What are the post-fault per-unit bus voltages? (Express in polar phasor form |V|Z0° ) ~) 1pu 1pu (~ V, = 0.578 Lo° V;= 0.384 L0° V;= %3D feuetot bus -j6.098 Z33 AVI 0.o692 0.4220 AV2 jG.098 (j) 0.101 0.l6159 D.164 %3D

Introductory Circuit Analysis (13th Edition)
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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Can someone please explain how to convert V1=-0.4220 to poloar phasor form? (V1=0.578<0)

For the power system shown at right the impedance matrix 2 is j0.5 j0.2 3 j0.4 0.145 0.120 0.0692 (1) 0.246 0.101 bus 0.0692 0.101 0.164 j0.2 j0.25 Pre-fault all bus voltages are 1 pu. Then a three-phase fault to ground occurs at bus 3. What are the post-fault per-unit bus voltages? (Express in polar phasor form |v|Z0°) 1pu 1pu V, = 0.578 Lo° V;= 0.384 L0° V;= Fr fault ot bus 3 If -j6.098 Z33 jo. AV 0.o692 0.4220 j6098 (G) 0.101 0.l6159 D.164
Transcribed Image Text:For the power system shown at right the impedance matrix 2 is j0.5 j0.2 3 j0.4 0.145 0.120 0.0692 (1) 0.246 0.101 bus 0.0692 0.101 0.164 j0.2 j0.25 Pre-fault all bus voltages are 1 pu. Then a three-phase fault to ground occurs at bus 3. What are the post-fault per-unit bus voltages? (Express in polar phasor form |v|Z0°) 1pu 1pu V, = 0.578 Lo° V;= 0.384 L0° V;= Fr fault ot bus 3 If -j6.098 Z33 jo. AV 0.o692 0.4220 j6098 (G) 0.101 0.l6159 D.164
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New voltage at a bus = old bus voltage + change in voltage

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