Boise State University
Department of Electrical and Computer Engineering
ECE 473 Power System Analysis I
Fall 2011
Catalog Data: ECE 473 Power System Analysis (3-0-3)(F/S). Three-phase AC systems, generators, transformers, transmission lines, one-line dia
ECE473
EXAM #1 SOLUTIONS
FALL 2011
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
N
ECE473
EXAM #1 SOLUTIONS
FALL 2011
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
N
ECE473
EXAM #1 SOLUTIONS
FALL 2012
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
N
ECE473
EXAM #1 SOLUTIONS
FALL 2013
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
N
ECE473
EXAM #1
FALL 2013
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
Name:
Probl
ECE473
EXAM #2
FALL 2013
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
Name:
Probl
ECE473
EXAM #2 SOLUTIONS
FALL 2011
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
N
ECE473
EXAM #2 SOLUTIONS
FALL 2012
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
N
ECE473
EXAM #2 SOLUTIONS
FALL 2013
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
N
ECE473
HOMEWORK #3 SOLUTIONS
FALL 2013
Problem 3.1 (Problem 4.1 p. 220)
17.00 -cmil/ft (1.02 1000) ft
= 0.01558 /1000 ft
1113, 000 cmil
50 + T
50 + 228.1
Rdc, 50 o C = Rdc, 20 o C
= 0.01558
20 + T
20 + 228.1
5280 ft
= 0.01558 1.121 = 0.01746
= 0.0922 /m
ECE473
EXAM #1 SOLUTIONS
FALL 2010
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
N
ECE473
EXAM #1 SOLUTIONS
FALL 2009
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
N
ECE473
EXAM #1
FALL 2008
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
Name:
Probl
ECE473
EXAM #1
FALL 2009
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
Name:
Probl
ECE473
EXAM #1
FALL 2010
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
Name:
Probl
ECE473
EXAM #1
FALL 2011
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
Name:
Probl
ECE573
EXAM #2
FALL 2010
Instructions:
1. Closed-book, closed-notes, open-mind exam.
2. Work each problem on the exam booklet in the space provided.
3. Write neatly and clearly for partial credit. Cross out any material you do not want graded.
Name:
Probl
ECE473
HOMEWORK #2
DUE: FRIDAY, SEPTEMBER 9, 2011
Problem 2.1 (Problem 2.41 p. 86)
Answers: 13.32 kW, 9.977 kVAr, 16.63 kVA
Problem 2.2 (Problem 2.43 p. 86)
Answers:
(a) 5 0o A, 1800 W, 0 VAr
(b) 193.6 V
(c) 2.236 A, 2.582 A
(d) 450 W, 600 Var, 1200 W, 90
ECE473
HOMEWORK #3
DUE: FRIDAY, SEPTEMBER 16, 2011
Problem 3.1 (Problem 4.3 p. 220)
Answer: 1.614
Problem 3.2 (Problem 4.4 p. 220)
Errata: Use a 795-MCM instead of a 793-MCM conductor and a resistance of 0.0880 /km instead
of 0.0080 /km.
Answers:
(a) 4.0
ECE473
HOMEWORK #2 SOLUTIONS
FALL 2011
Problem 2.1 (Problem 2.41 p. 86)
SL =
3VLL IL =
3(480)(20) 16.63 kVA
=
3VLL IL cos 13.32 kW
PL =
=
2 P2 =
QL =
SL
16.632 13.322 9.977 kVAr
=
L
or QL =
3VLL IL sin =
3(480)(20) 1 0.82 9.977 kVAr
=
Problem 2.2 (Problem