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Fig
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I
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N
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2
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I
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Dr
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Fig
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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2
0
8
8
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8
694
I
n
t J
P
o
w
E
lec
&
Dr
i
S
y
s
t
,
Vo
l.
9
,
No
.
4
,
Dec
em
b
er
2
0
1
8
:
1765
–
1
7
7
3
1772
RE
F
E
R
E
NC
E
S
[1
]
E.
Ba
b
a
e
i,
S
.
A
li
lu
,
a
n
d
S
.
L
a
a
li
,
“
A
n
e
w
g
e
n
e
ra
l
to
p
o
lo
g
y
f
o
r
c
a
sc
a
d
e
d
m
u
lt
il
e
v
e
l
in
v
e
rters
w
it
h
re
d
u
c
e
d
n
u
m
b
e
r
o
f
c
o
m
p
o
n
e
n
ts
b
a
se
d
o
n
d
e
v
e
lo
p
e
d
H
-
b
rid
g
e
,
”
IEE
E
T
ra
n
s.
In
d
.
E
lec
tro
n
.
,
v
o
l.
6
1
,
n
o
.
8
,
p
p
.
3
9
3
2
–
3
9
3
9
,
A
u
g
.
2
0
1
4
.
[2
]
M
.
F
.
Ka
n
g
a
rlu
a
n
d
E.
Ba
b
a
e
i,
“
A
g
e
n
e
ra
li
z
e
d
c
a
sc
a
d
e
d
m
u
lt
il
e
v
e
l
in
v
e
rter u
sin
g
se
ries
c
o
n
n
e
c
ti
o
n
o
f
su
b
-
m
u
lt
il
e
v
e
l
in
v
e
rters
,
”
IEE
E
T
ra
n
s.
P
o
we
r
El
e
c
tro
n
.
,
v
o
l
.
2
8
,
n
o
.
2
,
p
p
.
6
2
5
–
6
3
6
,
F
e
b
.
2
0
1
3
.
[3
]
J.
H.
Kim
,
S
.
K.
S
u
l,
a
n
d
P
.
N.
En
jeti,
“
A
c
a
rrier
-
b
a
se
d
P
W
M
m
e
th
o
d
w
it
h
o
p
ti
m
u
m
s
w
it
c
h
in
g
se
q
u
e
n
c
e
f
o
r
a
m
u
lt
il
e
v
e
l
f
o
u
r
-
leg
v
o
lt
a
g
e
so
u
rc
e
in
v
e
rter,”
IEE
E
T
r
a
n
s.
I
n
d
.
A
p
p
l
.
,
v
o
l.
4
4
,
n
o
.
4
,
p
p
.
1
2
3
9
–
1
2
4
8
,
Ju
l.
/A
u
g
.
2
0
0
8
.
[4
]
O.
L
o
p
e
z
e
t
a
l.
,
“
Co
m
p
a
riso
n
o
f
a
F
P
GA
im
p
le
m
e
n
tatio
n
o
f
tw
o
m
u
lt
il
e
v
e
l
sp
a
c
e
v
e
c
to
r
P
W
M
a
lg
o
r
it
h
m
s,”
IEE
E
T
ra
n
s.
I
n
d
.
El
e
c
tro
n
.
,
v
o
l.
5
5
,
n
o
.
4
,
p
p
.
1
5
3
7
–
1
5
4
7
,
A
p
r.
2
0
0
8
.
[5
]
E.
Ba
b
a
e
i
a
n
d
S
.
S
h
e
e
r
m
o
h
a
m
m
a
d
z
a
d
e
h
,
“
H
y
b
rid
m
u
lt
il
e
v
e
l
in
v
e
rter
u
sin
g
s
w
it
c
h
e
d
-
c
a
p
a
c
it
o
r
u
n
i
ts,
”
IEE
E
T
ra
n
s.
In
d
.
El
e
c
tro
n
.
,
v
o
l.
6
1
,
n
o
.
9
,
p
p
.
4
6
1
4
–
4
6
2
1
,
S
e
p
.
2
0
1
4
.
[6
]
A
.
A
.
Bo
o
ra
,
A
.
Na
m
i,
F
.
Zare
,
A
.
G
h
o
sh
,
a
n
d
F
.
Blaa
b
jerg
,
“
Vo
lt
a
g
e
sh
a
rin
g
c
o
n
v
e
rter
to
su
p
p
ly
sin
g
le
-
p
h
a
se
a
s
y
m
m
e
tri
c
f
o
u
r
-
lev
e
l
d
io
d
e
c
lam
p
e
d
i
n
v
e
rter w
it
h
h
ig
h
p
o
w
e
r
fa
c
t
o
r
lo
a
d
s,”
IEE
E
T
ra
n
s.
P
o
we
r E
lec
tro
n
.
,
v
o
l.
2
5
,
n
o
.
1
0
,
p
p
.
2
5
0
7
–
2
5
2
0
,
Oc
t.
2
0
1
0
.
[7
]
J.
Ro
d
rig
u
e
z
,
S
.
Be
rn
e
t,
P
.
S
teim
e
r,
a
n
d
I.
L
iza
m
a
,
“
A
su
rv
e
y
o
n
n
a
tu
ra
l
p
o
i
n
t
c
lam
p
e
d
in
v
e
rters
,
”
IEE
E
T
ra
n
s.
In
d
.
El
e
c
tro
n
.
,
v
o
l.
5
7
,
n
o
.
7
,
p
p
.
2
2
1
9
–
2
2
3
0
,
Ju
l
.
2
0
1
0
.
[8
]
E.
Ba
b
a
e
i,
M
.
F
.
Ka
n
g
a
rlu
,
M
.
S
a
b
a
h
i,
a
n
d
M
.
R.
A
li
z
a
d
e
h
P
a
h
lav
a
n
i,
“
Ca
sc
a
d
e
d
m
u
lt
il
e
v
e
l
in
v
e
rter u
sin
g
su
b
-
m
u
lt
il
e
v
e
l
c
e
ll
s,”
El
e
c
tr.
Po
we
r
S
y
st.
Res
.
,
v
o
l.
9
6
,
p
p
.
1
0
1
–
1
1
0
,
M
a
r.
2
0
1
3
.
[9
]
J.
C.
W
u
,
K.
D.
W
u
,
H.
L
.
Jo
u
,
a
n
d
S
.
T
.
X
iao
,
“
Dio
d
e
-
c
lam
p
e
d
m
u
lt
il
e
v
e
l
p
o
w
e
r
c
o
n
v
e
rter w
it
h
a
z
e
ro
-
se
q
u
e
n
c
e
c
u
rre
n
t
lo
o
p
f
o
r
th
re
e
-
p
h
a
se
th
re
e
-
w
ir
e
h
y
b
rid
p
o
w
e
r
f
il
ter,”
El
e
c
t.
Po
we
r
S
y
st.
Res
.
,
v
o
l.
8
1
,
n
o
.
2
,
p
p
.
2
6
3
–
2
7
0
,
F
e
b
.
2
0
1
1
.
[1
0
]
N
.
F
a
ro
k
h
n
ia,
S
.
H
.
F
a
th
i,
N.
Y
o
u
se
f
p
o
o
r,
a
n
d
M
.
K.
Ba
k
h
sh
iza
d
e
h
,
“
M
in
im
iza
ti
o
n
s o
f
to
tal
h
a
rm
o
n
i
c
d
isto
rti
o
n
in
c
a
sc
a
d
e
d
m
u
lt
il
e
v
e
l
in
v
e
rter b
y
re
g
u
latin
g
o
f
v
o
lt
a
g
e
s DC so
u
rc
e
s,”
IET
P
o
we
r E
lec
tro
n
.
,
v
o
l.
5
,
n
o
.
1
,
p
p
.
1
0
6
–
1
1
4
,
Ja
n
.
2
0
1
2
.
[1
1
]
S
.
L
a
a
li
,
K.
A
b
b
a
sz
a
d
e
h
,
a
n
d
H
.
L
e
s
a
n
i,
“
Co
n
tr
o
l
o
f
a
s
y
m
m
e
tri
c
c
a
sc
a
d
e
d
m
u
lt
il
e
v
e
l
in
v
e
rters
b
a
se
d
o
n
c
h
a
rg
e
b
a
lan
c
e
c
o
n
tr
o
l
m
e
th
o
d
s,”
I
n
t.
Re
v
.
El
e
c
t.
En
g
.
,
v
o
l.
6
,
n
o
.
2
,
p
p
.
5
2
2
–
5
2
8
,
M
a
r.
/A
p
r.
2
0
1
1
.
[1
2
]
E.
Ba
b
a
e
i
a
n
d
S
.
H
.
Ho
ss
e
in
i,
“
Ch
a
rg
e
b
a
lan
c
e
c
o
n
tro
l
m
e
th
o
d
s f
o
r
a
s
y
m
m
e
tri
c
a
l
c
a
s
c
a
d
e
m
u
lt
il
e
v
e
l
c
o
n
v
e
rters
,
”
in
Pro
c
.
ICEM
S
,
S
e
o
u
l,
Ko
re
a
,
2
0
0
7
,
p
p
.
7
4
–
7
9
.
[1
3
]
Y.
Hin
a
g
o
a
n
d
H.
Ko
izu
m
i,
“
A
si
n
g
le
-
p
h
a
se
m
u
lt
il
e
v
e
l
in
v
e
rter u
sin
g
sw
it
c
h
e
d
se
ries
/p
a
ra
ll
e
l
DC v
o
lt
a
g
e
so
u
rc
e
s,”
IEE
E
T
ra
n
s.
I
n
d
.
El
e
c
tro
n
.
,
v
o
l
.
5
7
,
n
o
.
8
,
p
p
.
2
6
4
3
–
2
6
5
0
,
A
u
g
.
2
0
1
0
.
[1
4
]
T
h
i
y
a
g
a
ra
jan
V
,
S
o
m
a
su
n
d
a
ra
m
P
“
A
Ne
w
S
e
v
e
n
L
e
v
e
l
S
y
m
m
e
tri
c
a
l
In
v
e
rter w
it
h
Re
d
u
c
e
d
S
w
it
c
h
Co
u
n
t”
In
tern
a
ti
o
n
a
l
Jo
u
rn
a
l
o
f
P
o
w
e
r
El
e
c
tro
n
ics
a
n
d
Driv
e
S
y
ste
m
(IJP
E
DS)
Vo
l.
9
,
N
o
.
2
,
J
u
n
e
2
0
1
8
,
p
p
.
9
2
1
~
9
2
5
[1
5
]
L
ip
ik
a
Na
n
d
a
,
A
Da
s
g
u
p
ta,
U.
K.
Ro
u
t
“
A
c
o
m
p
a
ra
ti
v
e
A
n
a
l
y
sis o
f
S
y
m
m
e
tri
c
a
l
a
n
d
A
s
y
m
m
e
tri
c
a
l
Ca
sc
a
d
e
d
M
u
lt
il
e
v
e
l
In
v
e
rter Ha
v
in
g
Re
d
u
c
e
d
Nu
m
b
e
r
o
f
S
w
it
c
h
e
s an
d
DC S
o
u
rc
e
s”
In
tern
a
ti
o
n
a
l
J
o
u
r
n
a
l
o
f
P
o
w
e
r
El
e
c
tro
n
ics
a
n
d
Driv
e
S
y
ste
m
(IJ
P
ED
S
)
V
o
l
.
8
,
No
.
4
,
De
c
e
m
b
e
r
2
0
1
7
,
p
p
.
1
5
9
5
~
1
6
0
2
[1
6
]
A
p
a
rn
a
P
ra
y
a
g
,
S
a
n
jay
Bo
d
k
h
e
“
No
v
e
l
S
y
m
m
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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.
Evaluation Warning : The document was created with Spire.PDF for Python.