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[
1
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.
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[
2
]
-
[
3
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.
B
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3
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.
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I
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PEDS
I
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N:
2088
-
8
694
F
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VAR.
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[
6
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.
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[
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n
t
-
co
n
n
ec
ted
ST
A
T
C
OM
h
a
s
p
la
y
ed
a
m
aj
o
r
r
o
le
in
F
A
C
T
S.
A
co
n
v
e
n
tio
n
al
ST
A
T
C
OM
,
w
h
ich
co
n
s
tr
u
cted
w
i
th
a
P
W
M
s
w
itc
h
i
n
g
i
n
v
er
ter
an
d
D
C
-
l
in
k
ca
p
ac
ito
r
,
ca
n
p
r
o
v
id
e
q
u
ick
er
r
esp
o
n
s
e
(
i.e
.
,
in
a
f
e
w
c
y
cle
s
)
to
th
e
c
h
a
n
g
in
g
lo
ad
in
g
co
n
d
it
io
n
s
in
t
h
e
p
o
w
er
s
y
s
te
m
[
8
]
.
Fo
r
a
co
m
m
er
cial
ST
A
T
C
OM
w
h
ic
h
s
p
ec
i
f
icall
y
d
esi
g
n
ed
f
o
r
P
F
o
r
u
n
b
alan
ce
p
o
w
er
co
m
p
e
n
s
atio
n
,
b
atter
y
en
er
g
y
s
to
r
ag
e
s
y
s
te
m
(
B
E
SS
)
w
il
l
b
e
i
n
teg
r
ated
a
s
t
h
e
D
C
-
li
n
k
v
o
lta
g
e
s
o
u
r
ce
to
s
to
r
e
en
er
g
y
a
n
d
s
u
p
p
o
r
t
ap
p
licatio
n
s
t
h
at
r
eq
u
ir
e
h
i
g
h
ac
tiv
e
c
u
r
r
en
t
co
m
p
en
s
a
tio
n
[
9
]
.
Fo
r
th
ese
r
ea
s
o
n
s
,
in
d
u
s
tr
ies
i
n
s
tall
ST
A
T
C
OM
in
t
h
eir
elec
tr
ic
n
e
t
w
o
r
k
to
i
m
p
r
o
v
e
p
o
w
er
q
u
alit
y
an
d
ac
h
ie
v
e
lo
n
g
ter
m
co
s
t s
av
in
g
.
E
x
ten
s
i
v
e
r
esear
ch
e
s
h
av
e
b
ee
n
ca
r
r
ied
o
u
t o
v
er
t
h
e
las
t
f
e
w
d
ec
ad
es a
n
d
it is
p
r
o
v
e
n
t
h
at
m
u
lti
-
le
v
el
in
v
er
ter
to
p
o
lo
g
ies
ar
e
ca
p
ab
le
to
o
v
er
co
m
e
p
r
o
b
lem
s
ass
o
ciate
d
w
it
h
co
n
v
en
tio
n
al
v
o
lt
ag
e
s
o
u
r
ce
in
v
er
ter
s
(
VSI
s
)
.
Sp
e
cif
ical
l
y
,
M
C
HI
t
u
r
n
s
to
b
e
a
p
r
o
m
is
i
n
g
to
p
o
lo
g
y
i
n
ST
A
T
C
OM
ap
p
licatio
n
d
u
e
to
its
co
n
tr
o
l
s
i
m
p
lic
it
y
,
e
x
te
n
s
ib
ilit
y
,
m
o
d
u
lar
izatio
n
a
n
d
t
h
e
ca
p
ab
ilit
y
o
f
p
r
o
v
id
in
g
n
e
g
ati
v
e
s
eq
u
e
n
ce
c
u
r
r
en
t
co
m
p
e
n
s
at
io
n
[
1
0
]
.
B
esid
es
th
at,
m
o
d
u
latio
n
tec
h
n
iq
u
e
a
s
o
n
e
o
f
t
h
e
co
r
e
co
m
p
o
n
e
n
ts
o
f
ST
A
T
C
OM
af
f
ec
ts
th
e
co
m
p
e
n
s
a
tio
n
o
b
j
ec
tiv
es,
s
tead
y
-
s
tate
an
d
tr
an
s
ien
t
p
er
f
o
r
m
a
n
ce
s
.
T
h
er
ef
o
r
e,
s
e
v
er
al
m
u
lti
-
le
v
el
P
W
M
tech
n
iq
u
es
h
av
e
b
ee
n
p
r
o
p
o
s
ed
,
r
esear
ch
ed
an
d
d
o
cu
m
en
t
ed
th
eo
r
etica
ll
y
.
T
h
ese
tech
n
i
q
u
es
in
cl
u
d
e
ca
r
r
ier
b
ased
p
u
ls
e
w
id
th
m
o
d
u
latio
n
(
C
B
P
W
M)
,
SHEP
W
M
an
d
s
p
ac
e
v
ec
to
r
m
o
d
u
lat
io
n
(
S
VM
)
.
Am
o
n
g
th
e
s
e
tech
n
iq
u
es,
M
SHEP
W
M
co
n
t
r
o
ls
th
e
lo
w
o
r
d
er
h
ar
m
o
n
ics
tig
h
tl
y
w
it
h
r
elati
v
el
y
lo
w
s
witch
i
n
g
f
r
eq
u
e
n
c
y
;
h
en
ce
,
r
esu
ltin
g
in
lo
w
s
w
itc
h
in
g
lo
s
s
a
n
d
g
o
o
d
to
tal
h
ar
m
o
n
ics
d
is
to
r
tio
n
(
T
HD)
p
er
f
o
r
m
an
ce
.
F
u
r
th
er
m
o
r
e,
ap
p
r
o
p
r
iate
co
n
tr
o
l
s
ch
e
m
e
d
esig
n
i
n
f
lu
e
n
ce
s
t
h
e
p
er
f
o
r
m
a
n
ce
o
f
a
ST
A
T
C
OM
to
r
ea
ct
to
p
o
w
er
ex
c
h
an
g
e
d
em
a
n
d
s
p
r
o
m
p
tl
y
w
it
h
h
i
g
h
ac
cu
r
ac
y
.
Var
io
u
s
co
n
tr
o
l
s
ch
e
m
e
s
o
f
MCHI
b
ased
STA
T
C
OM
h
a
v
e
b
ee
n
d
ev
elo
p
ed
f
o
r
p
o
w
er
r
eg
u
l
atio
n
u
s
in
g
m
o
s
tl
y
ti
m
e
d
o
m
ai
n
ap
p
r
o
ac
h
to
ac
h
iev
e
th
e
p
r
e
-
d
e
f
i
n
ed
p
er
f
o
r
m
a
n
ce
s
d
u
e
to
its
ca
p
ab
ilit
y
to
ca
lcu
la
t
e
r
ef
er
en
ce
cu
r
r
en
ts
an
d
s
e
n
s
it
iv
it
y
to
tr
ac
e
lo
ad
v
ar
iatio
n
[
1
0
]
.
Fo
r
in
s
tan
ce
,
P
ar
k
er
et
al.
p
r
o
p
o
s
ed
a
c
o
n
tr
o
l
s
tr
ateg
y
an
d
a
m
o
d
u
lar
b
o
o
s
t
co
n
v
er
ter
w
ith
MCHI
to
to
ler
ate
m
o
d
u
le
f
au
lts
f
o
r
lar
g
e
d
ir
ec
t
d
r
iv
e
w
in
d
t
u
r
b
in
e
g
e
n
er
ato
r
[
1
1
]
w
i
th
t
h
e
s
w
itc
h
i
n
g
f
r
eq
u
en
c
y
o
f
th
e
r
ec
tif
ier
s
et
at
1
6
k
Hz.
W
h
e
n
a
f
ailed
m
o
d
u
le
w
a
s
d
etec
te
d
,
it
w
o
u
ld
b
e
b
y
p
ass
ed
a
n
d
th
e
b
o
o
s
t
co
n
v
er
ter
w
o
u
ld
i
n
cr
ea
s
e
t
h
e
DC
-
li
n
k
v
o
ltag
e
o
f
t
h
e
r
est
o
f
th
e
m
o
d
u
les
to
h
o
ld
th
e
r
ea
ctiv
e
p
o
w
er
o
u
tp
u
t
co
n
s
ta
n
t.
Ho
w
e
v
er
,
th
e
p
r
o
p
o
s
ed
DC
-
li
n
k
v
o
lta
g
e
co
n
tr
o
ller
in
r
esp
o
n
s
e
to
a
s
tep
ch
a
n
g
e
o
f
v
o
ltag
e
d
em
a
n
d
(
i.e
.
,
f
r
o
m
6
9
0
V
to
7
5
0
V)
tak
es
ap
p
r
o
x
i
m
ate
l
y
2
5
0
m
s
to
r
ea
ch
th
e
s
t
ea
d
y
s
tate
co
n
d
itio
n
.
A
n
o
v
el
f
i
v
e
-
le
v
el
s
m
u
ltis
tr
in
g
i
n
v
er
ter
to
p
o
lo
g
y
w
a
s
i
n
v
e
s
ti
g
ated
b
y
L
iao
a
n
d
L
ai
f
o
r
d
is
tr
ib
u
ted
e
n
er
g
y
r
eso
u
r
ce
s
b
ased
D
C
-
A
C
co
n
v
er
s
io
n
s
y
s
te
m
[
1
2
]
.
W
h
en
co
m
p
ar
ed
w
ith
th
e
co
n
v
e
n
t
io
n
al
b
o
o
s
t
co
n
v
er
ter
,
t
h
e
n
o
v
el
to
p
o
lo
g
y
o
f
f
er
s
lo
w
er
elec
tr
o
m
a
g
n
etic
i
n
ter
f
er
en
ce
(
E
MI
)
,
lo
w
er
T
HD
an
d
s
m
aller
f
ilter
s
ize.
Ho
w
e
v
er
,
s
w
itc
h
i
n
g
f
r
eq
u
en
c
y
o
f
8
5
k
Hz
w
as
e
m
p
lo
y
ed
to
k
ee
p
th
e
b
u
s
v
o
ltag
e
v
ar
iatio
n
m
i
n
i
m
u
m
(
i.e
.
,
1
0
V)
.
T
h
is
m
in
i
m
ized
t
h
e
t
h
ir
d
-
o
r
d
er
h
ar
m
o
n
ic
o
cc
u
r
r
en
ce
o
n
th
e
A
C
o
u
tp
u
t
v
o
lta
g
e.
A
h
i
g
h
p
o
w
er
ca
s
ca
d
ed
b
o
o
s
t
-
t
y
p
e
co
n
v
er
ter
s
y
s
te
m
f
o
r
lar
g
e
p
er
m
a
n
en
t
m
ag
n
et
w
i
n
d
g
e
n
er
ato
r
s
y
s
te
m
w
as
p
r
o
p
o
s
ed
b
y
Yu
a
n
et
al.
to
i
n
d
ep
en
d
en
tl
y
r
eg
u
late
t
h
e
ac
tiv
e
a
n
d
r
ea
ctiv
e
p
o
w
er
s
o
f
th
e
p
o
w
er
n
et
w
o
r
k
[
1
3
]
.
8
k
Hz
o
f
s
w
itc
h
in
g
f
r
eq
u
e
n
c
y
was
u
s
ed
f
o
r
b
o
th
t
h
e
co
n
v
er
ter
an
d
th
e
C
HI
.
Ho
w
ev
er
,
th
e
T
HD
g
en
er
ated
f
r
o
m
th
e
C
HI
w
as
n
o
t
d
is
cu
s
s
e
d
.
W
u
an
d
C
h
o
u
p
r
o
p
o
s
ed
a
DC
-
D
C
b
o
o
s
t
p
o
w
er
co
n
v
er
ter
w
ith
a
s
i
m
p
l
if
y
s
e
v
en
-
le
v
el
s
in
v
er
ter
t
h
at
co
n
tain
s
o
n
l
y
s
ix
s
w
itc
h
in
g
ele
m
e
n
ts
f
o
r
s
o
lar
p
o
w
er
g
en
er
atio
n
s
y
s
te
m
[
1
4
]
.
W
ith
th
e
s
w
i
tch
i
n
g
f
r
eq
u
e
n
c
y
o
f
1
5
.
3
6
k
Hz,
th
e
p
r
o
p
o
s
ed
cir
cu
it
co
n
f
i
g
u
r
ati
o
n
r
ed
u
ce
d
T
HD
(
i.e
.
,
3
.
6
%)
an
d
s
w
itch
in
g
lo
s
s
w
h
il
s
t
i
m
p
r
o
v
ed
p
o
w
er
ef
f
icien
c
y
.
Ho
w
e
v
er
,
t
h
e
e
m
p
l
o
y
m
e
n
t
o
f
t
h
e
d
ea
d
-
b
an
d
ti
m
e
to
p
r
ev
en
t
th
e
H
-
b
r
id
g
e
ce
ll
f
r
o
m
s
h
o
r
t
-
cir
c
u
it
i
s
n
o
t
d
is
c
u
s
s
ed
.
An
o
th
er
n
e
w
s
tr
u
ctu
r
e
o
f
s
e
v
e
n
-
le
v
el
s
b
o
o
s
t
DC
-
li
n
k
C
HI
w
a
s
p
r
o
p
o
s
ed
b
y
R
a
m
asa
m
i
et
al.
f
o
r
u
n
i
n
ter
r
u
p
ted
p
o
w
er
s
u
p
p
l
y
(
UP
S)
an
d
d
r
iv
e
ap
p
licatio
n
s
[
1
5
]
.
I
n
co
m
p
ar
is
o
n
to
th
e
co
n
v
en
t
io
n
al
t
w
o
-
s
tag
e
s
s
y
s
te
m
,
t
h
e
s
y
s
te
m
s
tr
u
ctu
r
ed
w
it
h
le
s
s
DC
s
o
u
r
ce
a
n
d
s
w
itc
h
co
u
n
t
r
ed
u
ce
d
th
e
v
o
ltag
e
s
tr
es
s
ac
r
o
s
s
th
e
i
n
v
er
ter
;
h
en
ce
,
m
a
k
in
g
th
e
s
y
s
te
m
m
o
r
e
co
s
t
ef
f
e
ctiv
e.
Ho
w
ev
er
,
t
h
e
e
m
p
lo
y
m
en
t
o
f
s
w
itc
h
in
g
f
r
eq
u
en
c
y
is
n
o
t
d
is
c
u
s
s
ed
.
R
ec
en
tl
y
,
Z
a
m
ir
i
et
al.
p
r
o
p
o
s
ed
a
n
o
v
el
s
tr
u
c
tu
r
e
f
o
r
m
u
lt
i
-
l
ev
el
i
n
v
er
ter
s
b
ased
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m
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ased
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I
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IJ
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7
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ased
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[
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ter
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I
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e
n
ce
alg
o
r
ith
m
,
g
o
o
d
d
y
n
a
m
ic
a
n
d
tr
an
s
ie
n
t
r
esp
o
n
s
e
s
w
er
e
attai
n
ed
at
b
o
th
th
e
ca
p
a
citiv
e
a
n
d
in
d
u
ct
iv
e
lo
ad
in
g
c
o
n
d
itio
n
s
.
RE
F
E
R
E
NC
E
S
[1
]
J.
Dix
o
n
,
e
t
a
l.
,
“
Re
a
c
ti
v
e
p
o
we
r
c
o
m
p
e
n
sa
ti
o
n
tec
h
n
o
l
o
g
ies
:
sta
te
-
of
-
th
e
-
a
rt
re
v
i
e
w
,
”
in
Pro
c
e
e
d
in
g
s
o
f
th
e
IEE
E
,
v
o
l.
9
3
,
p
p
.
2
1
4
4
-
2
1
6
4
,
2
0
0
5
.
[2
]
A
.
Ed
ris,
e
t
a
l.
,
“
P
ro
p
o
se
d
term
s
a
n
d
d
e
f
in
it
io
n
s
f
o
r
f
lex
ib
le
A
C
tran
sm
is
sio
n
sy
ste
m
(F
A
CT
S
),
”
IE
EE
T
ra
n
sa
c
ti
o
n
o
n
P
o
we
r De
li
v
e
ry
,
v
o
l.
1
2
,
p
p
.
1
8
4
8
-
1
8
5
3
,
1
9
9
7
.
[3
]
K.
M
.
Isla
m
a
n
d
A
.
H.
S
a
m
ra
,
“
Eff
e
c
t
o
f
c
o
n
d
e
n
se
rs
o
n
h
a
r
m
o
n
ic
p
ro
p
a
g
a
ti
o
n
i
n
A
C
p
o
we
r
s
y
ste
m
,
”
in
Pro
c
e
e
d
in
g
s
o
f
IE
EE
Vi
s
u
a
l
ize
th
e
Fu
tu
re
,
p
p
.
4
2
5
-
4
2
8
,
1
9
9
5
.
[4
]
M
.
Ch
i
n
d
ris,
e
t
a
l
.
,
“
Pro
p
a
g
a
ti
o
n
o
f
u
n
b
a
l
a
n
c
e
d
i
n
e
lec
tric
p
o
we
r
sy
ste
ms
,
”
in
p
ro
c
e
e
d
in
g
s
o
f
IEE
E
In
tern
a
ti
o
n
a
l
Co
n
f
e
re
n
c
e
o
n
El
e
c
tri
c
a
l
P
o
w
e
r
Qu
a
li
ty
a
n
d
Util
iza
ti
o
n
,
p
p
.
1
-
5,
2
0
0
7
.
[5
]
Y.
Ch
e
n
g
a
n
d
M
.
L
.
Cr
o
w
,
“
A
d
io
d
e
-
c
lam
p
e
d
m
u
lt
i
-
lev
e
l
in
v
e
rter
f
o
r
th
e
S
tatC
o
m
/BE
S
S
,
”
in
IEE
E
Po
we
r
En
g
i
n
e
e
rin
g
S
o
c
iety
W
in
ter
M
e
e
ti
n
g
,
p
p
.
4
7
0
-
4
7
5
,
2
0
0
2
.
[6
]
A
.
A
.
S
iad
a
a
n
d
C.
Ka
ru
n
a
r,
“
Im
p
ro
v
e
m
e
n
t
o
f
tran
sm
issio
n
li
n
e
p
o
w
e
r
tran
sf
e
r
c
a
p
a
b
il
it
y
,
c
a
se
stu
d
y
,
”
An
In
ter
n
a
t
io
n
a
l
J
o
u
rn
a
l
,
v
o
l
/i
ss
u
e
:
1
(
1
)
,
p
p
.
4
9
5
-
4
9
9
,
2
0
1
2
.
[7
]
G
.
Esc
o
b
a
r,
e
t
a
l.
,
“
A
n
a
d
a
p
ti
v
e
c
o
n
tr
o
ll
e
r
in
sta
ti
o
n
a
ry
re
f
e
re
n
c
e
fra
m
e
f
o
r
D
-
S
TAT
COM
in
u
n
b
a
la
n
c
e
d
o
p
e
ra
ti
o
n
f
ra
m
e
f
o
r
D
-
S
T
AT
COM
in
u
n
b
a
l
a
n
c
e
d
o
p
e
ra
ti
o
n
,
”
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
In
d
u
stri
a
l
E
lec
tro
n
ics
,
v
o
l.
5
1
,
p
p
.
4
0
1
-
4
0
9
,
2
0
0
4
.
[8
]
K.
R.
P
a
d
iy
a
r,
“
F
A
C
T
S
c
o
n
tro
ll
e
r
s in
p
o
w
e
r
tran
sm
is
sio
n
a
n
d
d
istr
i
b
u
ti
o
n
,”
Ne
w
Ag
e
,
In
d
ia
,
A
n
sh
a
n
,
2
0
0
7
.
[9
]
L
a
b
-
V
o
lt
,
“
S
tatic
S
y
n
c
h
ro
n
o
u
s
Co
m
p
e
n
sa
to
r
-
c
o
u
rse
w
a
re
sa
m
p
le
,
”
,
2
0
1
2
.
[
On
li
n
e
]
.
A
v
a
il
a
b
le:
ww
w
.
lab
v
o
lt
.
c
o
m
/d
o
w
n
lo
a
d
s/8
6
3
7
1
_
F
0
.
p
d
f
[1
0
]
D.
S
o
to
a
n
d
C.
G
.
G
re
e
n
,
“
A
c
o
m
p
a
riso
n
o
f
h
ig
h
-
p
o
w
e
r
c
o
n
v
e
rt
e
r
to
p
o
l
o
g
ies
f
o
r
th
e
i
m
p
le
m
e
n
ta
ti
o
n
o
f
F
A
C
T
S
c
o
n
tro
ll
e
rs,”
IEE
E
T
ra
n
s
a
c
ti
o
n
s o
n
In
d
u
stri
a
l
El
e
c
tro
n
ics
,
v
o
l.
4
9
,
p
p
.
1
0
7
2
-
1
0
8
0
,
2
0
0
2
.
[1
1
]
M
.
A
.
P
a
rk
e
r
,
e
t
a
l.
,
“
F
a
u
lt
-
to
l
e
ra
n
t
c
o
n
tro
l
f
o
r
a
m
o
d
u
lar
g
e
n
e
ra
to
r
–
c
o
n
v
e
rter
sc
h
e
m
e
f
o
r
d
irec
t
-
d
riv
e
w
in
d
tu
rb
i
n
e
s”
,
IEE
E
T
ra
n
s
a
c
ti
o
n
s o
n
I
n
d
u
stri
a
l
El
e
c
tro
n
ics
,
v
o
l
.
5
8
,
p
p
.
3
0
5
-
3
1
5
,
2
0
1
0
.
[1
2
]
Y.
H.
L
iao
a
n
d
C.
M
.
L
a
i,
“
Ne
w
l
y
-
c
o
n
stru
c
ted
sim
p
li
f
ied
sin
g
le
-
p
h
a
se
m
u
lt
istri
n
g
m
u
lt
il
e
v
e
l
in
v
e
rter
to
p
o
lo
g
y
f
o
r
d
istri
b
u
te
d
e
n
e
rg
y
re
so
u
rc
e
s,”
IEE
E
T
ra
n
sa
c
ti
o
n
o
n
Po
we
r E
lec
tro
n
ics
,
v
o
l.
2
9
,
p
p
.
2
3
8
6
-
2
3
9
2
,
2
0
1
1
.
[1
3
]
X
.
B
.
Yu
a
n
,
e
t
a
l.
,
“
A
tran
sf
o
r
m
e
r
-
les
s
h
ig
h
-
p
o
w
e
r
c
o
n
v
e
rter
f
o
r
larg
e
p
e
r
m
a
n
e
n
t
m
a
g
n
e
t
w
in
d
g
e
n
e
ra
to
r
sy
ste
m
s,”
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
S
u
sta
i
n
a
b
l
e
En
e
rg
y
,
v
o
l.
3
,
p
p
.
3
1
8
-
3
2
9
,
2
0
1
2
.
[1
4
]
J.
C.
W
u
a
n
d
C.
W
.
Ch
o
u
,
“
A
s
o
lar
p
o
w
e
r
g
e
n
e
ra
ti
o
n
s
y
ste
m
w
i
th
a
se
v
e
n
-
le
v
e
l
in
v
e
rter,”
IEE
E
T
ra
n
sa
c
ti
o
n
o
n
Po
we
r E
lec
tro
n
ics
,
v
o
l
.
2
9
,
p
p
.
3
4
5
4
-
3
4
6
2
,
2
0
1
3
.
[1
5
]
R.
Uth
iras
a
m
y
,
e
t
a
l.
,
“
S
tru
c
tu
re
o
f
b
o
o
st
DC
-
li
n
k
c
a
sc
a
d
e
d
m
u
lt
il
e
v
e
l
in
v
e
rter
f
o
r
u
n
in
terr
u
p
ted
p
o
w
e
r
su
p
p
ly
a
p
p
li
c
a
ti
o
n
s,”
IET
Po
we
r E
lec
tro
n
ics
,
v
o
l.
8
,
p
p
.
2
0
8
5
-
2
0
9
6
,
2
0
1
5
.
[1
6
]
E.
Zam
iri
,
e
t
a
l.
,
“
A
n
e
w
c
a
sc
a
d
e
d
sw
it
c
h
e
d
-
c
a
p
a
c
it
o
r
m
u
lt
il
e
v
e
l
in
v
e
rter
b
a
se
d
o
n
im
p
ro
v
e
d
se
ries
–
p
a
ra
ll
e
l
c
o
n
v
e
rsio
n
w
it
h
les
s n
u
m
b
e
r
o
f
c
o
m
p
o
n
e
n
ts,
”
IEE
E
T
ra
n
sa
c
ti
o
n
s o
n
In
d
u
stria
l
El
e
c
tro
n
ics
,
v
o
l.
6
3
,
p
p
.
3
5
8
2
-
3
5
9
4
,
2
0
1
6
.
[1
7
]
K.
H.
La
w
,
e
t
a
l.
,
“
A n
e
w
re
a
c
ti
v
e
c
u
rre
n
t
re
f
e
re
n
c
e
a
lg
o
rit
h
m
f
o
r
S
TAT
COM
s
y
ste
m
b
a
se
d
o
n
c
a
sc
a
d
e
d
m
u
lt
il
e
v
e
l
in
v
e
rters
,
”
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
Po
we
r E
lec
tro
n
ics
,
v
o
l
.
3
0
,
p
p
.
3
5
7
7
-
3
5
8
8
,
2
0
1
4
.
[1
8
]
K.
H.
L
a
w
,
e
t
a
l.
,
“
S
HE
-
P
W
M
c
a
sc
a
d
e
d
m
u
lt
il
e
v
e
l
in
v
e
rter
w
it
h
a
d
ju
sta
b
le
DC
-
v
o
lt
a
g
e
lev
e
ls
c
o
n
tro
l
f
o
r
S
TAT
COM
a
p
p
li
c
a
ti
o
n
s,”
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
Po
we
r E
lec
tro
n
i
c
s
,
v
o
l.
2
9
,
p
p
.
6
4
3
3
-
6
4
4
4
,
2
0
1
4
.
[1
9
]
F
.
De
n
g
a
n
d
Z.
Ch
e
n
,
“
Co
n
tr
o
l
o
f
I
m
p
ro
v
e
d
F
u
ll
-
Brid
g
e
T
h
re
e
-
Lev
e
l
DC/DC Co
n
v
e
rter
f
o
r
W
in
d
T
u
rb
in
e
s in
a
DC
G
rid
,
”
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
P
o
we
r E
lec
tro
n
ics
,
v
o
l.
2
8
,
p
p
.
3
1
4
-
3
2
4
,
2
0
1
2
.
[2
0
]
L
.
Zh
a
n
g
,
e
t
a
l.
,
“
A
M
o
d
u
lar
G
rid
-
Co
n
n
e
c
ted
P
h
o
to
v
o
lt
a
ic
G
e
n
e
r
a
ti
o
n
S
y
ste
m
B
a
se
d
o
n
DC
Bu
s,”
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
Po
we
r E
lec
tr
o
n
i
c
s
,
v
o
l.
2
6
,
p
p
.
5
2
3
-
5
3
1
,
2
0
1
0
.
[2
1
]
H.
A
k
a
g
i
a
n
d
R.
Kitad
a
,
“
Co
n
tr
o
l
a
n
d
d
e
sig
n
o
f
a
m
o
d
u
lar
m
u
l
ti
lev
e
l
c
a
sc
a
d
e
BT
B
s
y
ste
m
u
sin
g
b
id
irec
ti
o
n
a
l
iso
late
d
DC/DC c
o
n
v
e
rters
,
”
IEE
E
T
ra
n
sa
c
ti
o
n
s o
n
P
o
we
r E
lec
tro
n
ics
,
v
o
l.
2
6
,
p
p
.
2
4
5
7
-
2
4
6
4
,
2
0
1
1
.
[2
2
]
T
e
x
a
s
In
stru
m
e
n
ts
,
“
V
o
lt
a
g
e
F
e
d
F
u
ll
Brid
g
e
DC
-
DC
a
n
d
DC
-
AC
Co
n
v
e
rter
f
o
r
Hi
g
h
-
F
re
q
u
e
n
c
y
In
v
e
rter
Us
in
g
C2
0
0
0
,”
[
O
n
li
n
e
]
.
A
v
a
il
a
b
le:
ww
w
.
ti
.
c
o
m
/l
it
/an
/sp
ra
b
w
0
a
/sp
ra
b
w
0
a
.
p
d
f
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8
694
IJ
PEDS
Vo
l.
8
,
No
.
1
,
Ma
r
ch
201
7
:
1
0
0
–
108
108
B
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f
ro
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(UMS
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.
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