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lev
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o
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t stato
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cu
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th
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ter
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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N
:
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8
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IJ
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2
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n
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ig
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CO
NCLUS
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n
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h
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ar
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m
o
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t
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r
o
f
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er
ed
co
n
tr
o
l
s
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ateg
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s
ap
p
lied
to
th
r
ee
p
h
a
s
e
C
ascad
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in
v
er
te
r
ar
e
p
r
esen
ted
.
T
h
e
w
av
e
f
o
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m
s
clea
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l
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d
ep
ictin
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t
h
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al
m
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t
all
t
h
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co
n
tr
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ateg
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ar
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ll
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tr
o
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g
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e
lin
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o
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p
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ase
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s
tato
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cu
r
r
en
t,
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p
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d
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e.
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h
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o
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th
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s
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ateg
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i
n
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d
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.
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t
is
o
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v
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h
at
p
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s
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elev
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le
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el)
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t
h
e
m
o
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t
e
f
f
icien
t
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n
tr
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l
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ate
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it
h
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w
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o
f
ab
o
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t
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%
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o
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l
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ateg
ies.
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h
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etter
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s
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ACK
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E
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e
th
an
k
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h
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n
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it
y
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C
o
m
m
is
s
io
n
(
UG
C
)
,
Go
v
t.
o
f
I
n
d
ia,
Ne
w
Del
h
i
f
o
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r
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v
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j
o
r
R
esear
ch
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r
o
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ec
t to
ca
r
r
y
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t t
h
e
R
e
s
ea
r
ch
w
o
r
k
o
n
M
u
lti
-
L
e
v
el
I
n
v
er
ter
s
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PEDS
I
SS
N:
2
0
8
8
-
8
694
P
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r
ma
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ce
A
n
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S
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tr
a
teg
ies fo
r
Th
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P
h
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a
s
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ed
….
(
R
a
viku
ma
r
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h
u
ky
a
)
843
AP
P
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NDI
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T
ab
le
2
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s
te
m
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h
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.
8
6
6
RE
F
E
R
E
NC
E
S
[1
]
M
.
S
a
t
ya
n
a
ra
y
a
n
a
a
n
d
P
.
S
a
ti
sh
k
u
m
a
r,
”
A
n
a
l
y
sis
a
n
d
De
sig
n
o
f
S
o
lar
P
h
o
to
V
o
lt
a
ic
G
rid
Co
n
n
e
c
ted
In
v
e
rter”
,
In
d
o
n
e
sia
n
J
o
u
rn
a
l
o
f
El
e
c
trica
l
En
g
i
n
e
e
rin
g
a
n
d
I
n
fo
rm
a
ti
c
s (
IJ
EE
I)
Vo
l.
3
,
N
o
.
4
,
De
c
e
m
b
e
r
2
0
1
5
,
p
p
.
1
9
9
~
2
0
8
.
[2
]
G
.
S
rid
h
a
r,
P
.
S
a
ti
s
h
Ku
m
a
r,
M
.
S
u
s
h
a
m
a
,
”
P
h
a
se
Dis
p
o
siti
o
n
P
W
M
T
e
c
h
n
iq
u
e
f
o
r
El
e
v
e
n
L
e
v
e
l
Ca
s
c
a
d
e
d
M
u
l
ti
lev
e
l
In
v
e
rter
w
it
h
Re
d
u
c
e
d
Nu
m
b
e
r
o
f
Ca
rriers
”
,
T
EL
KOM
NIKA
In
d
o
n
e
sia
n
J
o
u
r
n
a
l
o
f
El
e
c
trica
l
En
g
i
n
e
e
rin
g
Vo
l.
1
5
,
No
.
1
,
Ju
ly
2
0
1
5
,
p
p
.
4
9
~
5
6
.
[3
]
P
ra
d
e
e
p
M
.
Bh
a
g
w
a
t
,
V
.
R.
S
tef
a
n
o
v
ic
,
”
Ge
n
e
ra
li
z
e
d
S
tru
c
tu
re
o
f
a
M
u
lt
il
e
v
e
l
P
W
M
In
v
e
rter”
,
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
in
d
u
stry
Ap
p
li
c
a
ti
o
n
s
,
V
o
l.
1
A
-
1
9
,
No
.
6
,
N
o
v
e
m
b
e
r/D
e
c
e
m
b
e
r
1
9
8
3
.
[4
]
G
a
u
ta
m
S
in
h
a
,
T
h
o
m
a
s
A
.
L
ip
o
,
“
A
F
o
u
r
L
e
v
e
l
R
e
c
ti
f
ier
-
In
v
e
rter
S
y
ste
m
f
o
r
Driv
e
A
p
p
li
c
a
ti
o
n
s”
,
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
In
d
u
stry
A
p
p
li
c
a
ti
o
n
s
,
Vo
l.
3
0
,
No
.
4
,
Ju
ly
1
9
9
4
,
p
p
.
9
3
8
-
9
4
4
.
[5
]
G
.
Ca
rra
r
a
,
S
.
G
a
rd
e
ll
a
,
M
.
M
a
rc
h
e
so
n
i,
R.
S
a
lu
tari,
G
.
S
c
iu
tt
o
,
“
A
n
e
w
M
u
lt
il
e
v
e
l
P
W
M
M
e
th
o
d
:
A
T
h
e
o
re
ti
c
a
l
A
n
a
l
y
si
s
”
,
Pro
c
.
PE
S
C
1
9
9
0
,
p
p
.
3
6
3
-
3
7
1
.
[6
]
Jo
sé
Ro
d
rig
u
e
z
,
Jih
-
S
h
e
n
g
L
a
i
a
n
d
F
a
n
g
Zh
e
n
g
P
e
n
g
,
“
M
u
lt
il
e
v
e
l
I
n
v
e
rters
:
A
S
u
rv
e
y
o
f
T
o
p
o
l
o
g
ies
,
Co
n
tro
ls,
a
n
d
A
p
p
li
c
a
ti
o
n
s”
,
IEE
E
T
ra
n
sa
c
ti
o
n
s o
n
I
n
d
u
stria
l
El
e
c
tro
n
ics
,
Vo
l.
4
9
,
No
.
4
,
A
u
g
u
st 2
0
0
2
,
P
p
7
2
4
-
7
3
8
.
[7
]
L
e
v
i.
E,
Bo
jo
i.
R.
,
P
ro
f
u
m
o
.
F
.
,
T
o
li
y
a
t,
e
t
a
l,
“
M
u
lt
i
p
h
a
se
in
d
u
c
ti
o
n
m
o
to
r
d
riv
e
s
-
a
tec
h
n
o
lo
g
y
sta
tu
s
re
v
ie
w
”
,
IET
El
e
c
tr.
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o
we
r A
p
p
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,
2
0
0
7
,
1
,
(4
),
p
p
.
4
8
9
–
5
1
6
.
[8
]
R
y
u
,
H.M
.
,
Kim
,
J.H.
a
n
d
S
u
l
,
S
.
K,
“
A
n
a
l
y
sis
o
f
m
u
lt
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-
p
h
a
se
sp
a
c
e
v
e
c
to
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p
u
lse
w
id
th
m
o
d
u
latio
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b
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se
d
o
n
m
u
lt
ip
le d
–
q
sp
a
c
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s co
n
c
e
p
t’
,
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EE
T
ra
n
s.
P
o
we
r E
lec
tro
n
.
2
0
0
5
,
2
0
,
(6
),
p
p
.
1
3
6
4
–
1
3
7
1
.
[9
]
Ho
lm
e
s,
D.,
L
ip
o
,
T
.
A
.
:
“
P
u
lse
w
id
th
m
o
d
u
latio
n
f
o
r
p
o
w
e
r
c
o
n
v
e
rters
–
p
ri
n
c
ip
les
a
n
d
p
ra
c
ti
c
e
”
.
IEE
E
Pre
ss
S
e
rie
s o
n
P
o
we
r E
n
g
in
e
e
rin
g
(W
il
e
y
,
P
isc
a
taw
a
y
,
NJ
,
US
A
,
2
0
0
3
).
[1
0
]
W
a
n
g
,
F
EI:
“
S
in
e
-
tri
a
n
g
le
v
e
rsu
s
sp
a
c
e
v
e
c
to
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m
o
d
u
latio
n
f
o
r
th
re
e
lev
e
l
P
W
M
v
o
lt
a
g
e
so
u
rc
e
in
v
e
rters
”
.
Pro
c
.
IEE
E
-
IAS
An
n
u
a
l
M
e
e
ti
n
g
,
Ro
m
e
,
2
0
0
0
,
p
p
.
2
4
8
2
–
2
4
8
8
.
[1
1
]
F
.
Z.
P
e
n
g
a
n
d
J.
S
.
L
a
i,
“
M
u
lt
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e
v
e
l
c
a
sc
a
d
e
v
o
lt
a
g
e
-
so
u
rc
e
in
v
e
rter
w
it
h
se
p
a
ra
te
DC
so
u
rc
e
s,
”
U.S
.
P
a
ten
t
5
6
4
2
275
,
Ju
n
e
2
4
,
1
9
9
7
.
[1
2
]
K.
T
h
o
rb
o
rg
a
n
d
A
.
Ny
sto
rm
,
“
S
t
a
irca
se
P
W
M
:
a
n
u
n
c
o
m
p
li
c
a
ted
a
n
d
e
ff
icie
n
t
m
o
d
u
lati
o
n
tec
h
n
iq
u
e
f
o
r
a
c
m
o
to
r
d
riv
e
s,”
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
Po
we
r E
lec
tro
n
ics
,
Vo
l.
P
E
3
,
No
.
4
,
1
9
8
8
,
p
p
.
3
9
1
-
3
9
8
.
[1
3
]
J.
Ro
d
rig
u
e
z
,
J.
-
S
.
L
a
i,
a
n
d
F
.
Z.
P
e
n
g
,
“
M
u
lt
i
-
lev
e
l
in
v
e
rter:
a
su
rv
e
y
o
f
to
p
o
l
o
g
ies
,
c
o
n
tro
ls,
a
n
d
a
p
p
li
c
a
ti
o
n
s,”
I
EEE
T
ra
n
s.In
d
.
E
lec
tro
n
,
v
o
l.
4
9
,
n
o
.
4
,
p
p
.
7
2
4
–
7
3
8
,
A
u
g
.
2
0
0
2
.
[1
4
]
G
u
i
-
ji
a
su
,
s
e
n
io
r
m
e
m
b
e
r
,
IEE
E
“
M
u
lt
il
e
v
e
l
DC
-
L
in
k
In
v
e
rter
”
,
IEE
E
T
ra
n
s.
o
n
In
d
a
p
p
li
c
a
ti
o
n
s
,
v
o
l.
4
1
,
issu
e
4
,
p
p
.
7
2
4
-
7
3
8
,
m
a
y
/j
u
n
e
2
0
0
5
.
[1
5
]
W
.
Ya
o
,
H.
Hu
,
a
n
d
Z.
L
u
,
“
Co
m
p
a
riso
n
s
o
f
sp
a
c
e
-
v
e
c
to
r
m
o
d
u
l
a
ti
o
n
a
n
d
c
a
rrier
-
b
a
se
d
m
o
d
u
lati
o
n
o
f
m
u
lt
il
e
v
e
l
in
v
e
rter,”
IEE
E
T
ra
n
s.
P
o
we
r E
le
c
tro
n
,
v
o
l
.
2
3
,
n
o
.
1
,
p
p
.
4
5
–
5
1
,
Ja
n
.
2
0
0
8
.
[1
6
]
M
.
H.
Oh
sa
to
,
G
.
Ki
m
u
ra
,
a
n
d
M
.
S
h
io
y
a
,
“
F
iv
e
-
ste
p
p
e
d
P
W
M
in
v
e
rter
u
se
d
in
p
h
o
to
-
v
o
lt
a
ic
sy
ste
m
s,”
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
In
d
u
stri
a
l
El
e
c
tr
o
n
ics
,
Vo
l.
3
8
,
Oc
to
b
e
r,
1
9
9
1
,
p
p
.
3
9
3
-
3
9
7
.
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