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1
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J
an
u
ar
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201
8
,
p
p
.
24
~
28
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C
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p
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A
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:
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u
KJ
,
R
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M,
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1.
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NT
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P
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Descript
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C
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v
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t
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t
w
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v
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v
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lta
g
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ter
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g
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T
HD
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o
u
tp
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t
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ltag
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en
t
w
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f
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m
w
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e
n
f
ed
to
th
r
ee
p
h
ase
in
d
u
ctio
n
m
o
to
r
.
T
h
r
ee
in
d
u
ctio
n
m
o
to
r
is
a
p
u
r
e
in
d
u
ctiv
e
lo
ad
w
h
ic
h
ad
d
s
ce
r
tain
o
r
d
er
h
ar
m
o
n
ics t
o
v
o
ltag
e
ir
r
esp
ec
tiv
e
o
f
h
ar
m
o
n
ics
f
r
o
m
VSI
.
B
a
ck
g
ro
un
d
[
1
]
Pre
s
en
ts
a
P
V
p
o
w
er
ed
d
r
iv
e
w
it
h
h
ig
h
m
o
to
r
p
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f
o
r
m
an
ce
b
ec
a
u
s
e
s
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lar
is
a
p
o
w
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o
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r
ce
ex
tr
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ti
n
g
p
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f
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lar
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in
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cir
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t
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n
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f
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m
P
V
s
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.
L
iter
at
u
r
e
[
2
]
s
h
o
w
n
a
s
in
g
le
p
h
a
s
e
th
r
e
e
lev
el
m
u
lti
lev
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l
in
v
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ter
f
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tr
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f
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g
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p
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m
p
ap
p
licatio
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s
f
ed
f
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m
a
p
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to
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ltaic
s
o
u
r
ce
.
T
HD
s
h
o
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ld
b
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r
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ce
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in
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to
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m
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,
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u
cin
g
T
HD
en
h
an
ce
s
p
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w
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q
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alit
y
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f
li
n
e
[
3
]
.
L
iter
a
tu
r
e
[
4
-
5
]
p
r
o
p
o
s
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I
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2502
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4752
I
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d
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J
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&
C
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m
p
Sci,
Vo
l.
9
,
No
.
1
,
J
an
u
ar
y
2
0
1
8
:
24
–
28
25
a
P
V
b
ased
Z
s
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ce
in
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ter
f
o
r
v
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p
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i
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d
u
ctio
n
m
o
to
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d
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ap
p
licatio
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s
.
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s
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s
p
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to
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b
ased
ap
p
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p
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ter
;
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to
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ec
tio
n
al
g
o
r
ith
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ted
in
s
p
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to
r
ap
p
r
o
ac
h
.
I
n
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ap
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d
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th
at
th
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P
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in
v
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ter
to
p
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y
it
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s
a
h
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g
h
ef
f
ic
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c
y
to
p
o
lo
g
y
[
6
]
.
Fire
f
l
y
alg
o
r
ith
m
is
p
r
esen
ted
in
th
i
s
p
ap
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in
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g
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ith
m
u
s
ed
to
g
en
er
ate
th
e
r
ea
ctiv
e
p
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[
7
]
.
Pre
d
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e
Dir
ec
t
P
o
w
er
C
o
n
tr
o
l
(
P
DP
C
)
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f
Gr
id
-
C
o
n
n
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ted
Du
al
-
A
c
ti
v
e
B
r
id
g
e
M
u
lti
lev
el
I
n
v
er
ter
is
e
x
p
lain
ed
i
n
[
8
]
.
P
r
o
p
o
r
tio
n
al
I
n
teg
r
al
E
s
ti
m
at
o
r
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f
th
e
Stato
r
R
esi
s
tan
ce
f
o
r
Dir
ec
t
T
o
r
q
u
e
C
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n
tr
o
l
I
n
d
u
ct
io
n
Mo
to
r
Dr
iv
e
is
d
is
cu
s
s
ed
in
[
9
]
.
C
o
m
p
ar
is
o
n
P
er
f
o
r
m
an
ce
s
o
f
I
n
d
ir
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t
Fi
eld
Or
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ted
C
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tr
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l
f
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T
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P
h
ase
I
n
d
u
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Mo
to
r
Dr
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es
is
p
r
ese
n
ted
in
[
1
0
]
.
Sen
s
o
r
less
C
o
n
tr
o
l
o
f
B
L
D
C
Mo
to
r
u
s
i
n
g
F
u
zz
y
lo
g
ic
co
n
tr
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f
o
r
s
o
lar
p
o
w
er
Gen
er
atio
n
i
s
d
is
c
u
s
s
ed
in
[
1
1
]
.
2.
P
RO
P
O
SE
D
SW
I
T
CH
E
D
Z
-
SO
URCE M
UL
T
I
L
E
VE
L
I
NVER
T
E
R
DRIV
E
Fig
u
r
e
1
s
h
o
w
s
o
v
er
all
b
lo
ck
d
iag
r
a
m
o
f
p
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p
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ed
in
d
u
c
tio
n
m
o
to
r
d
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s
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itc
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-
s
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m
u
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I
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28
RE
F
E
R
E
NC
E
S
[1
]
K.
C.
R.
Nish
a
a
n
d
S
.
Ja
in
,
"
PV
p
o
we
re
d
p
e
rf
o
rm
a
n
c
e
e
n
h
a
n
c
e
d
t
h
re
e
-
sta
g
e
c
a
sc
a
d
e
d
q
u
a
si
Z
-
so
u
rc
e
in
v
e
rte
r
fed
in
d
u
c
ti
o
n
mo
to
r
d
riv
e
"
,
2
0
1
5
In
tern
a
ti
o
n
a
l
Co
n
f
e
re
n
c
e
o
n
Circu
it
s,
P
o
w
e
r
a
n
d
Co
m
p
u
ti
n
g
T
e
c
h
n
o
lo
g
ies
[
ICCP
CT
-
2
0
1
5
]
,
Na
g
e
rc
o
il
,
2
0
1
5
,
p
p
.
1
-
7.
[2
]
R.
Ch
in
t
h
a
m
a
ll
a
,
K.
S
.
G
a
n
e
sh
a
n
d
S
.
Ja
i
n
,
"
An
o
p
ti
ma
l
a
n
d
e
ff
ici
e
n
t
PV
sy
ste
m
u
sin
g
two
2
-
lev
e
l
c
a
sc
a
d
e
d
3
-
lev
e
l
in
v
e
rte
r
fo
r
Ce
n
trif
u
g
a
l
p
u
mp
"
,
2
0
1
4
I
EE
E
In
tern
a
ti
o
n
a
l
Co
n
f
e
re
n
c
e
o
n
P
o
w
e
r
El
e
c
tro
n
ics
,
Dri
v
e
s
a
n
d
En
e
rg
y
S
y
st
e
m
s (P
EDES
)
,
M
u
m
b
a
i,
2
0
1
4
,
p
p
.
1
-
6.
[3
]
G
.
Du
rg
a
su
k
u
m
a
r
a
n
d
M
.
K.
P
a
t
h
a
k
,
"
T
HD
re
d
u
c
ti
o
n
in
p
e
rfo
rm
a
n
c
e
o
f
mu
lt
i
-
lev
e
l
in
v
e
rte
r
fed
i
n
d
u
c
t
io
n
mo
to
r
d
riv
e
"
,
In
d
ia In
tern
a
ti
o
n
a
l
Co
n
f
e
re
n
c
e
o
n
P
o
w
e
r
El
e
c
tro
n
ics
2
0
1
0
(
IICP
E
2
0
1
0
)
,
Ne
w
De
lh
i,
2
0
1
1
,
p
p
.
1
-
6.
[4
]
V
.
V
i
jay
,
K.
J.
S
h
ru
t
h
i,
P
.
G
.
Kin
i,
C.
V
isw
a
n
a
th
a
a
n
d
M
.
S
.
B
h
a
tt
,
"
M
o
d
if
ied
Z
-
so
u
rc
e
in
v
e
rte
r
b
a
s
e
d
th
re
e
p
h
a
se
in
d
u
c
ti
o
n
mo
t
o
r
d
riv
e
fo
r
so
la
r
PV
a
p
p
li
c
a
t
io
n
s
"
,
2
0
1
4
I
n
tern
a
ti
o
n
a
l
Co
n
f
e
re
n
c
e
o
n
P
o
w
e
r
S
ig
n
a
ls
Co
n
tro
l
a
n
d
Co
m
p
u
tatio
n
s (
E
P
S
CICON
)
,
T
h
ri
ss
u
r,
2
0
1
4
,
p
p
.
1
-
5.
[5
]
S
.
P
a
tra,
A
n
k
u
r,
A
.
M
o
h
a
n
ty
,
S
.
R.
M
o
h
a
n
ty
a
n
d
N.
Kish
o
r,
"
Co
mp
a
ra
t
ive
a
ss
e
ss
me
n
t
o
f
th
e
imp
ro
v
e
me
n
t
o
f
o
u
t
p
u
t
v
o
lt
a
g
e
wit
h
in
c
re
a
se
d
lev
e
l
q
u
a
si
-
Z
S
o
u
rc
e
M
u
lt
il
e
v
e
l
in
v
e
rte
r
"
,
2
0
1
3
S
t
u
d
e
n
ts
Co
n
f
e
re
n
c
e
o
n
En
g
in
e
e
rin
g
a
n
d
S
y
st
e
m
s (S
CES
)
,
A
ll
a
h
a
b
a
d
,
2
0
1
3
,
p
p
.
1
-
5.
[6
]
Ba
v
it
ra
,
K.,
S
in
th
u
ja,
S
.
,
M
a
n
o
h
a
ra
n
,
N.
a
n
d
Ra
jes
h
,
S
.
,
2
0
1
5
.
T
h
e
h
ig
h
e
ff
icie
n
c
y
re
n
e
wa
b
le
P
V
i
n
v
e
rter
to
p
o
lo
g
y
.
In
d
ia
n
J
o
u
rn
a
l
o
f
S
c
ien
c
e
a
n
d
T
e
c
h
n
o
lo
g
y
,
8
(
1
4
)
.
[7
]
Ka
n
n
a
n
,
G
.
,
S
u
b
ra
m
a
n
ian
,
D.P
.
a
n
d
S
h
a
n
k
a
r,
R.
U.,
2
0
1
5
.
Re
a
c
ti
v
e
p
o
w
e
r
o
p
ti
m
iz
a
ti
o
n
u
si
n
g
f
iref
l
y
a
lg
o
rit
h
m
.
In
Po
we
r E
lec
tro
n
ics
a
n
d
Ren
e
w
a
b
le E
n
e
rg
y
S
y
ste
ms
(p
p
.
8
3
-
9
0
).
S
p
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e
r
In
d
ia.
[8
]
G
o
h
,
H.
H.,
A
id
a
,
A
.
,
Lee
,
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.
S
.
,
S
im
,
S
.
Y.,
&
G
o
h
,
K.
C.
(2
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1
7
).
P
re
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Dire
c
t
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Co
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(
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A
BM
I).
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ter
n
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t
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o
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r E
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d
Dr
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ste
ms
(
IJ
PE
DS
)
,
8
(4
)
.
[9
]
Ch
a
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ri,
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G
.
,
Bo
d
k
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,
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re
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.
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0
1
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).
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Dire
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Driv
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ter
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[1
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A
z
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.
A
.
,
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u
laim
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n
,
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.
,
&
S
a
ll
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h
,
Z.
(2
0
1
7
).
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m
p
a
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o
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Driv
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ter
n
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ti
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rn
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r
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Dr
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),
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[1
1
]
S
u
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d
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.
,
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.
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so
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les
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Co
n
tro
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BLDC
M
o
to
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si
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g
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z
y
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ter
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u
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fi
c
re
se
a
rc
h
(
IJ
M
S
R)
,
9
(2
)
.
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