ECE474
HOMEWORK #9 SOLUTIONS
SPRING 2013
Problem 9.1 (Problem 10.15 p. 570)
(a) Three-phase permanent fault on the load side of bus 3.
The three-phase fault current is 2000 A. From Table 10.19, the 56
ECE474
HOMEWORK #6 SOLUTIONS
SPRING 2013
Problem 6.1 (Problem 10.3 p. 567)
(a) ZB = 1.0
I = 10 A
E = (Z + ZB )I = (0.125 + 1.0)(10) = 11.25 V
Ie 0.18 A (from Figure 10.8)
=
(
)
(
)
200
200
I=
(I + Ie
ECE474
HOMEWORK #6 SOLUTIONS
SPRING 2013
Problem 6.1
~
Ia
~
Va
+
~
Vb
R
~
Ib
~
In
R
+
~
Vc
+
+
R
~
Ic
~
Vn
R
Consider the above unbalanced power system with Va
o V, and R = 10 .
Vc = 120 90
= 120
0o V
ECE474
HOMEWORK #4 SOLUTIONS
SPRING 2013
Problem 3.1 (Problem 6.43 p. 364)
See attached PW printout on page 4.
Problem 3.2 (Problem 7.3 p. 411)
80
Current with no dc offset
Current with maximum dc off
ECE474
HOMEWORK #2 SOLUTIONS
SPRING 2013
Problem 2.1 (Problem 6.6 p. 359)
% Problem 6.6 p. 359
clear all; clc; eps = 0.01;
k = 0; x = []; x = [0; 0; 0];
F = [6*x(1)+ 2*x(2)+ 1*x(3)-3;
4*x(1)+10*x(2)+
ECE474
EXAM #3 SOLUTIONS
SPRING 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
ECE474
EXAM #2 SOLUTIONS
SPRING 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
ECE474
EXAM #2 SOLUTIONS
SPRING 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
ECE474
EXAM #1 SOLUTIONS
SPRING 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
ECE474
EXAM #1 SOLUTIONS
SPRING 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
ECE474
EXAM #1 SOLUTIONS
SPRING 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