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ir
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ag
n
etic
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n
ter
f
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e
n
ce
[
6
]
-
[
7
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.
T
h
e
p
r
o
p
o
s
ed
z
-
s
o
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r
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et
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as
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ate
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tp
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t
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s
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o
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o
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te
m
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m
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ica
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a
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s
t th
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t v
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[
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o
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r
o
m
an
i
n
v
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ter
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ca
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e
n
t
th
e
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t
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o
l
in
s
id
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s
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elf
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h
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s
p
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t
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ar
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cr
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s
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l
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n
d
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s
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ial
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p
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s
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it
h
a
s
b
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p
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f
o
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m
an
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cir
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its
a
n
d
s
e
m
ico
n
d
u
cto
r
d
ev
ices
[
9
]
.
Nu
m
er
o
u
s
p
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l
s
e
w
id
t
h
m
o
d
u
latio
n
s
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I
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8
8
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8
694
IJ
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Vo
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8
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No
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2
,
J
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n
e
201
7
:
739
–
7
4
6
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u
r
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r
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.
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I
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ased
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r
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m
e
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tp
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t
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g
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h
e
3
ca
s
ca
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h
-
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e
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n
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iv
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al
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et
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s
c
h
e
m
e
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d
d
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g
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r
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.
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ased
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d
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a
m
al
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m
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w
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M
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ST
CO
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L
L
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m
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atio
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g
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gh
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m
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th
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(
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h
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is
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t r
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w
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3
D
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p
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ec
to
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m
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latio
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co
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tr
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to
m
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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
IJ
PEDS
Vo
l.
8
,
No
.
2
,
J
u
n
e
201
7
:
739
–
7
4
6
746
RE
F
E
R
E
NC
E
S
[1
]
F
.
Z.
P
e
n
g
,
“
Z
-
S
o
u
rc
e
In
v
e
rter,”
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
t
h
e
In
d
u
stry
Ap
p
li
c
a
t
io
n
s
,
v
o
l.
3
9
,
No
.
2
,
p
p
.
5
0
4
-
5
1
0
,
M
a
rc
h
/A
p
ril
2
0
0
5
.
[2
]
J.
A
n
d
e
rso
n
a
n
d
F
.
Z.
P
e
n
g
,
“
F
o
u
r
q
u
a
si
Z
so
u
rc
e
in
v
e
rter,”
in
Pr
o
c
.
IEE
E
Po
we
r
El
e
c
tro
n
.
S
p
e
c
.
Co
n
f.
,
2
0
0
8
,
p
p
.
2
7
4
3
–
2
7
4
9
.
[3
]
L
i,
Yu
a
n
,
e
t
a
l.
"
M
o
d
e
l
in
g
a
n
d
c
o
n
tr
o
l
o
f
q
u
a
si
Z
so
u
rc
e
i
n
v
e
rter
f
o
r
d
istri
b
u
ted
g
e
n
e
ra
ti
o
n
a
p
p
l
ica
ti
o
n
s."
I
n
d
u
stria
l
El
e
c
tro
n
ics
,
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
6
0
.
4
(2
0
1
3
):
1
5
3
2
-
1
5
4
1
.
[4
]
P
e
n
g
,
F
a
n
g
Zh
e
n
g
,
M
iao
se
n
S
h
e
n
"
M
a
x
i
m
u
m
b
o
o
st
c
o
n
tr
o
l
o
n
th
e
Z
-
so
u
rc
e
in
v
e
rter."
IEE
E
T
r
a
n
s
a
c
ti
o
n
s
o
n
p
o
w
e
r
e
lec
tro
n
ics
2
0
.
4
(
2
0
1
1
):
8
3
3
-
8
3
8
.
[5
]
Eff
a
h
,
F
ra
n
c
is
Bo
a
f
o
,
e
t
a
l.
"
S
p
a
c
e
-
v
e
c
to
r
-
m
o
d
u
late
d
th
re
e
-
lev
e
l
i
n
v
e
rters
w
it
h
a
sin
g
le
Z
-
so
u
rc
e
n
e
tw
o
rk
.
"
Po
we
r
El
e
c
tro
n
ics
,
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
2
8
.
6
(2
0
1
3
):
2
8
0
6
-
2
8
1
5
.
[6
]
L
iu
,
Yu
sh
a
n
,
e
t
a
l.
"
O
v
e
rv
i
e
w
o
f
sp
a
c
e
v
e
c
to
r
m
o
d
u
lat
io
n
s
f
o
r
th
re
e
-
p
h
a
se
Z
-
so
u
rc
e
/q
u
a
si
-
Z
-
so
u
rc
e
in
v
e
rters
.
"
Po
we
r E
lec
tro
n
ics
,
IE
EE
T
ra
n
sa
c
ti
o
n
s
o
n
2
9
.
4
(
2
0
1
4
):
2
0
9
8
-
2
1
0
8
.
[7
]
He
m
a
n
th
a
k
u
m
a
r,
R.
,
Ra
g
h
a
v
e
n
d
ra
ra
jan
,
V
.
,
A
ji
n
S
e
k
h
a
r,
C.
S
.
,
S
a
s
ik
u
m
a
r,
M
.
“
A
n
o
v
e
l
h
y
b
rid
n
e
g
a
ti
v
e
h
a
l
f
c
y
c
l
e
b
ias
e
d
m
o
d
u
latio
n
sc
h
e
m
e
f
o
r
c
a
sc
a
d
e
d
m
u
lt
il
e
v
e
l
in
v
e
rter
”
,
In
ter
n
a
ti
o
n
a
l
J
o
u
rn
a
l
o
f
Po
we
r
El
e
c
tro
n
ics
a
n
d
Dr
ive
S
y
ste
ms
,
v
o
l
4
,
Iss
u
e
2
,
J
u
n
e
2
0
1
4
,
Pa
g
e
s 2
0
4
-
2
1
1
.
[8
]
Bh
a
ra
ti
ra
ja,
C.
,
Ra
g
h
u
,
P
a
l
in
ia
m
y
,
K.R.
S
.
“
Co
m
p
a
ra
ti
v
e
a
n
a
l
y
sis
f
o
r
d
if
f
e
r
e
n
t
P
W
M
tec
h
n
i
q
u
e
s
to
re
d
u
c
e
th
e
c
o
m
m
o
n
m
o
d
e
v
o
lt
a
g
e
in
th
re
e
-
lev
e
l
n
e
u
tral
-
p
o
i
n
t
-
c
lam
p
e
d
in
v
e
rters
f
o
r
v
a
riab
le
sp
e
e
d
in
d
u
c
ti
o
n
d
riv
e
s”
,
In
ter
n
a
t
io
n
a
l
J
o
u
rn
a
l
o
f
P
o
we
r E
lec
tro
n
ics
a
n
d
Dr
ive
S
y
ste
ms
,
v
o
l.
3
,
Iss
u
e
1
,
M
a
rc
h
2
0
1
3
,
P
a
g
e
s
1
0
5
-
1
1
6
.
[9
]
G
n
a
n
a
P
ra
k
a
sh
,
M
.
,
Ba
lam
u
ru
g
a
n
,
M
,
Um
a
sh
a
n
k
a
r,
S
.
“
A
n
e
w
m
u
l
ti
lev
e
l
in
v
e
rter
f
o
r
re
d
u
c
e
d
n
u
m
b
e
r
o
f
s
w
it
c
h
e
s”
,
In
ter
n
a
t
io
n
a
l
J
o
u
rn
a
l
o
f
P
o
we
r E
lec
tro
n
ics
a
n
d
Dr
ive
S
y
ste
ms
,
v
o
l
5
,
Iss
u
e
1
,
S
e
p
tem
b
e
r 2
0
1
4
,
P
a
g
e
s 6
3
-
7
0
.
[1
0
]
A
li
sh
a
h
,
R.
S
.
,
H
o
ss
e
in
i,
S
.
H.
“
A
n
e
w
m
u
lt
il
e
v
e
l
in
v
e
rter
stru
c
tu
r
e
f
o
r
h
ig
h
-
p
o
w
e
r
a
p
p
li
c
a
ti
o
n
s
u
sin
g
m
u
lt
i
-
c
a
rrier
P
W
M
sw
it
c
h
in
g
stra
teg
y
”
,
In
ter
n
a
ti
o
n
a
l
J
o
u
rn
a
l
o
f
P
o
we
r
El
e
c
tro
n
ics
a
n
d
Dr
ive
S
y
ste
ms
,
v
o
l
6
,
Iss
u
e
2
,
1
J
u
n
e
2
0
1
5
,
Pa
g
e
s 3
1
8
-
3
2
5
.
[1
1
]
L
.
M
.
T
o
lb
e
rt,
F
.
Z.
P
e
n
g
,
a
n
d
T
.
Ha
b
e
tl
e
r,
M
u
lt
il
e
v
e
l
Co
n
v
e
r
ters
f
o
r
L
a
r
g
e
El
e
c
tri
c
d
riv
e
s.
I
EE
E
T
ra
n
s.
I
n
d
.
Ap
p
li
c
a
t.
,
Ja
n
.
/F
e
b
.
2
0
1
4
.
v
o
l.
3
5
,
p
p
.
3
6
-
44
.
[1
2
]
P
o
h
Ch
ian
g
L
o
h
,
F
e
n
g
Ga
o
,
F
re
d
e
Blaa
b
jerg
,
a
n
d
S
o
k
we
il
i
m
.
Op
e
r
a
ti
o
n
a
l
A
n
a
l
y
sis
a
n
d
M
o
d
u
lati
o
n
Co
n
tr
o
l
o
f
T
h
re
e
L
e
v
e
l
Z
-
S
o
u
rc
e
In
v
e
rters
w
it
h
En
h
a
n
c
e
d
Ou
tp
u
t
W
a
v
e
f
o
r
m
Qu
a
li
ty
.
IEE
E
T
ra
n
sa
c
ti
o
n
o
n
Po
we
r
El
e
c
tro
n
ics
,
Ju
ly
2
0
1
0
.
Vo
l.
2
4
,
No
.
7
.
[1
3
]
S
a
m
irKo
u
ro
,
P
a
b
l
o
L
e
z
a
n
a
,
M
a
u
ricio
A
n
g
u
lo
a
n
d
Jo
sé
R
o
d
ríg
u
e
z
.
M
u
lt
ica
rrier
P
W
M
w
it
h
Dc
-
L
i
n
k
Rip
p
le
F
e
e
d
f
o
r
w
a
rd
Co
m
p
e
n
sa
ti
o
n
f
o
r
M
u
lt
i
l
e
v
e
l
In
v
e
rter
s.
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
P
o
we
r
El
e
c
tro
n
ics
,
Vo
l.
2
3
,
No
.
1
,
Ja
n
u
a
ry
2
0
1
0
.
[1
4
]
J.
P
ra
k
a
sh
,
S
a
ra
t
Ku
m
a
r
S
a
h
o
o
,
K.
R.
S
u
g
a
v
a
n
a
m
.
De
si
g
n
f
o
r
C
o
o
r
d
in
a
ted
C
o
n
tr
o
l
S
c
h
e
m
e
o
f
H
y
b
rid
Re
so
n
a
n
t
Bo
o
st C
o
n
v
e
rter an
d
M
u
l
ti
L
e
v
e
l
In
v
e
rter.
In
d
i
a
n
J
o
u
r
n
a
l
o
f
S
c
ien
c
e
a
n
d
T
e
c
h
n
o
l
o
g
y
,
9
(1
1
),
v
o
l
u
m
e
9
,
M
a
r
-
2
0
1
6
.
B
I
O
G
RAP
H
I
E
S
O
F
AUTH
O
RS
R.
Pa
la
n
isa
m
y
re
c
e
iv
e
d
B.
E
De
g
re
e
in
EE
E
f
ro
m
M
.
Ku
m
a
ra
sa
m
y
e
n
g
in
e
e
rin
g
c
o
ll
e
g
e
(A
n
n
a
Un
iv
e
rsit
y
Co
i
m
b
a
to
re
),
Ka
ru
r,
T
a
m
il
Na
d
u
,
In
d
ia
in
2
0
1
1
a
n
d
r
e
c
e
iv
e
d
th
e
M
.
T
e
c
h
d
e
g
r
e
e
in
P
o
w
e
r
El
e
c
tro
n
ics
a
n
d
Driv
e
s
f
ro
m
S
RM
Un
iv
e
rsit
y
,
Ka
tt
a
n
k
u
lath
u
r,
T
a
m
il
n
a
d
u
,
In
d
ia
in
2
0
1
3
.
A
n
d
p
u
rsu
i
n
g
P
h
D
d
e
g
re
e
in
th
e
a
re
a
o
f
Z
so
u
rc
e
in
v
e
rter
w
it
h
3
D
-
S
V
M
.
P
re
se
n
tl
y
w
o
rk
in
g
a
s
A
s
sista
n
t
P
r
o
f
e
ss
o
r
in
th
e
De
p
a
rtme
n
t
o
f
El
e
c
tri
c
a
l
En
g
in
e
e
rin
g
,
S
RM
Un
iv
e
rsity
,
Ka
tt
a
n
k
u
lath
u
r,
a
n
d
Ch
e
n
n
a
i,
I
n
d
ia.
His
re
se
a
rc
h
in
tere
sts
in
c
l
u
d
e
P
o
w
e
r
El
e
c
tro
n
ics
M
u
lt
il
e
v
e
l
in
v
e
rters
,
M
a
tri
x
c
o
n
v
e
rters
,
V
a
ri
o
u
s
P
W
M
T
e
c
h
n
iq
u
e
s an
d
g
rid
c
o
n
n
e
c
ted
P
h
o
t
o
v
o
lt
a
ic sy
ste
m
.
K
.
V
ija
y
a
k
u
m
a
r
re
c
e
iv
e
d
B.
E
d
e
g
re
e
in
El
e
c
tri
c
a
l
a
n
d
El
e
c
tro
n
ics
En
g
in
e
e
rin
g
a
n
d
M
.
E
d
e
g
re
e
in
P
o
w
e
r
S
y
st
e
m
En
g
in
e
e
rin
g
b
o
th
f
ro
m
A
n
n
a
m
a
lai
Un
iv
e
rsit
y
,
Ta
m
il
Na
d
u
,
I
n
d
ia.
&
re
c
e
iv
e
d
P
.
h
D
in
c
o
n
g
e
stio
n
M
a
n
a
g
e
m
e
n
t
in
De
re
g
u
late
d
P
o
w
e
r
s
y
st
e
m
s
f
ro
m
S
RM
Un
iv
e
rsit
y
,
Ka
tt
a
n
k
u
lath
u
r,
T
a
m
il
n
a
d
u
,
In
d
ia
in
2
0
1
3
.
His
re
se
a
rc
h
in
tere
sts
in
c
lu
d
e
P
o
w
e
r
s
y
st
e
m
:
De
re
g
u
latio
n
,
M
o
d
e
li
n
g
,
Co
n
tr
o
l
a
n
d
Op
e
ra
ti
o
n
,
Op
t
im
iza
ti
o
n
,
F
A
CT
S
,
P
o
w
e
r
Qu
a
li
t
y
.
P
re
se
n
tl
y
w
o
rk
in
g
a
s
P
ro
f
e
ss
o
r
a
n
d
He
a
d
o
f
D
e
p
a
rt
m
e
n
t
o
f
El
e
c
tri
c
a
l
&
El
e
c
tro
n
ics
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g
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