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h
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t
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se
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n
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re
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it
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4
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u
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ti
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ier
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4
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R).
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2
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p
h
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se
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A
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n
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n
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rd
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th
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c
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li
e
s
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it
h
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re
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ire
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e
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ts
o
f
th
e
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E
-
5
1
9
sta
n
d
a
rd
f
o
r
d
if
f
e
re
n
t
lo
a
d
s.
Be
sid
e
s,
a
p
o
w
e
r
fa
c
to
r
c
lo
se
to
o
n
e
is
o
b
tain
e
d
f
o
r
a
w
id
e
ra
n
g
e
o
f
D
T
CIM
D
p
e
rf
o
r
m
a
n
c
e
.
T
h
e
re
su
lt
s
sh
o
w
t
h
a
t
th
e
t
o
tal
h
a
rm
o
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ic
d
ist
o
rti
o
n
(T
HD
)
o
f
th
e
in
p
u
t
c
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n
t
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n
d
e
r
v
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riab
le l
o
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d
s f
o
r
4
4
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R
is
les
s th
a
n
3
%
.
K
ey
w
o
r
d
s
:
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C
I
MD
P
o
ly
g
o
n
au
to
tr
an
s
f
o
r
m
er
P
o
w
er
q
u
ali
t
y
R
ec
ti
f
ier
w
it
h
4
4
-
p
u
ls
e
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is
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a
n
o
p
en
a
cc
ess
a
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ticle
u
n
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C
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B
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s
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o
r
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s
p
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r
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1.
I
NT
RO
D
UCT
I
O
N
T
o
d
ay
,
in
d
u
ctio
n
m
o
to
r
d
r
iv
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b
ased
o
n
d
ir
ec
t
to
r
q
u
e
co
n
tr
o
lled
(
D
T
C
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s
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b
ased
o
n
6
PR
ar
e
u
s
ed
in
s
ev
er
al
i
n
d
u
s
tr
ial
ap
p
licati
o
n
s
[
1
]
.
T
h
e
m
o
s
t
i
m
p
o
r
tan
t
d
r
a
w
b
ac
k
o
f
a
6
P
R
u
s
e
d
in
DT
C
I
MD
s
i
s
t
h
e
in
j
ec
tio
n
o
f
th
e
cu
r
r
en
t
h
ar
m
o
n
ic
in
to
th
e
g
r
id
.
T
h
e
v
alu
e
o
f
cu
r
r
en
t
T
HD
s
h
o
u
ld
b
e
co
n
f
in
ed
w
ith
i
n
t
h
e
I
E
E
E
s
tan
d
ar
d
5
1
9
[
2
]
an
d
th
e
I
E
C
6
1
0
0
0
-
3
-
2
[
3
]
.
T
o
th
is
en
d
,
r
e
s
ea
r
ch
er
s
h
a
v
e
f
o
cu
s
ed
o
n
s
o
l
u
tio
n
s
to
el
i
m
in
ate
cu
r
r
en
t
T
HD
s
u
ch
as
th
e
u
s
e
o
f
m
u
ltip
u
ls
e
r
ec
ti
f
ier
s
(
MP
R
s
)
.
T
h
ese
MP
R
s
ar
e
b
ase
d
o
n
p
h
ase
-
s
h
i
f
ti
n
g
tr
an
s
f
o
r
m
er
s
o
r
p
u
ls
e
d
o
u
b
lin
g
cir
c
u
its
[
4
-
7
]
.
Ho
w
ev
er
,
u
n
d
er
lo
w
s
o
u
r
ce
i
m
p
ed
an
ce
o
r
lo
w
lo
ad
,
th
e
c
u
r
r
en
t
T
HD
f
o
r
MP
R
s
u
p
to
2
0
p
u
ls
es
w
il
l
b
e
m
o
r
e
th
a
n
5
%
[
8
-
1
4
]
.
A
2
4
P
R
b
a
s
ed
o
n
p
o
ly
g
o
n
au
to
tr
an
s
f
o
r
m
er
h
a
s
b
ee
n
r
ep
o
r
ted
in
[
1
5
]
,
w
h
ic
h
h
as
a
T
HD
ch
an
g
e
f
r
o
m
F
L
t
o
L
L
f
r
o
m
4
.
4
8
%
to
5
.
6
5
%.
An
o
th
er
2
4
P
R
b
ased
o
n
T
au
to
tr
an
s
f
o
r
m
er
h
as
al
s
o
b
ee
n
r
ep
o
r
ted
in
[
1
6
]
,
in
w
h
ich
cu
r
r
en
t
T
HD
is
m
o
r
e
t
h
an
5
%
u
n
d
er
a
li
g
h
t
lo
ad
.
I
t
s
h
o
u
ld
b
e
n
o
ted
th
at
s
o
m
e
ap
p
licatio
n
s
,
s
u
c
h
as
s
o
n
ar
ap
p
licatio
n
s
,
r
eq
u
ir
e
cu
r
r
en
t
T
HD
less
th
an
3
%,
an
d
th
er
ef
o
r
e
t
h
e
u
s
e
o
f
MP
R
s
w
it
h
p
u
l
s
es
m
o
r
e
th
a
n
2
4
is
in
ev
itab
le
[
17
].
I
n
o
r
d
er
to
r
ed
u
ce
th
e
T
HD
o
f
th
e
ac
m
ain
c
u
r
r
en
t,
i
n
[
1
8
-
2
4
]
Au
th
o
r
s
h
a
v
e
p
r
o
v
id
ed
2
0
,
3
0
,
3
6
an
d
4
0
P
R
s
,
b
u
t
th
ese
MP
R
s
h
a
v
e
h
ig
h
m
a
g
n
etic
r
ati
n
g
an
d
h
ig
h
co
m
p
le
x
it
y
.
A
4
0
P
R
b
ased
o
n
T
au
to
tr
an
s
f
o
r
m
er
h
as
b
ee
n
r
ep
o
r
ted
in
[
2
5
]
,
wh
ich
h
as
a
T
HD
ch
a
n
g
e
f
r
o
m
f
u
ll
lo
ad
to
l
ig
h
t
lo
ad
f
r
o
m
2
.
5
5
%
to
3
.
7
9
%.
An
o
th
er
4
0
P
R
b
ased
o
n
to
p
o
lo
g
y
a
u
to
tr
an
s
f
o
r
m
er
h
a
s
also
b
ee
n
r
ep
o
r
ted
in
[
2
6
]
,
in
w
h
i
ch
cu
r
r
e
n
t
T
HD
is
m
o
r
e
th
a
n
3
%
u
n
d
er
a
li
g
h
t
l
o
ad
.
Ho
w
ev
er
,
t
h
e
s
e
to
p
o
lo
g
i
es
h
av
e
h
i
g
h
m
a
g
n
e
tic
r
ati
n
g
s
a
n
d
ar
e
t
h
er
ef
o
r
e
ex
p
en
s
iv
e.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2252
-
8792
I
n
t J
A
p
p
l P
o
w
er
E
n
g
,
Vo
l.
10
,
No
.
2
,
J
u
n
e
2
0
2
1
:
8
9
–
96
90
I
n
cr
ea
s
in
g
t
h
e
n
u
m
b
er
o
f
p
u
l
s
es
r
ed
u
ce
s
t
h
e
cu
r
r
e
n
t
T
HD
b
u
t
w
it
h
t
h
e
ad
d
itio
n
al
co
m
p
l
ex
it
y
an
d
co
s
t
o
f
MP
R
s
[
2
7
-
3
3
]
.
On
th
e
o
th
er
h
an
d
,
th
e
u
s
e
o
f
p
ass
i
v
e
o
r
ac
tiv
e
f
ilter
s
ca
n
also
lead
to
cu
r
r
en
t
T
HD
r
ed
u
ctio
n
[
3
4
-
4
0
]
.
B
u
t
p
ass
iv
e
f
ilter
s
lead
to
ad
d
itio
n
al
lo
s
s
es,
an
d
t
h
eir
ef
f
icie
n
c
y
is
s
tr
o
n
g
l
y
i
n
f
lu
e
n
ce
d
b
y
f
r
eq
u
en
c
y
ch
a
n
g
es.
A
cti
v
e
f
ilt
er
s
ar
e
also
v
er
y
ex
p
en
s
i
v
e
an
d
h
av
e
a
co
m
p
lex
s
tr
u
ct
u
r
e.
Usi
n
g
MP
R
s
is
o
n
e
o
f
th
e
m
o
s
t
s
u
itab
le
m
e
th
o
d
s
f
o
r
cu
r
r
en
t
T
HD
r
e
d
u
ctio
n
.
I
n
th
is
p
ap
er
,
a
D
T
C
I
MD
b
ased
o
n
4
4
P
R
is
p
r
o
p
o
s
ed
w
it
h
a
n
o
v
el
p
o
l
y
g
o
n
au
to
tr
a
n
s
f
o
r
m
er
to
cu
r
r
en
t T
HD
r
ed
u
ctio
n
,
a
s
s
h
o
w
n
i
n
Fi
g
u
r
e
1
.
Fig
u
r
e
1
.
P
r
o
p
o
s
ed
D
T
C
I
MD
f
ed
w
ith
4
4
P
R
2.
P
RO
P
O
SE
D
4
4
P
R
I
n
Fi
g
u
r
e
1
,
t
h
e
DT
C
I
MD
f
ed
w
i
th
4
4
P
R
is
p
r
ese
n
ted
.
T
h
e
p
r
o
p
o
s
ed
4
4
P
R
in
cl
u
d
es
t
w
o
2
2
P
R
,
an
d
an
1
1
-
p
h
a
s
e
p
o
l
y
g
o
n
a
u
to
tr
an
s
f
o
r
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er
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a
n
d
t
w
o
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P
T
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h
e
m
ain
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k
o
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to
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e
r
is
to
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o
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ce
t
w
o
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er
ies
o
f
1
1
-
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h
a
s
e
v
o
ltag
e
w
i
th
a
p
h
ase
s
h
if
t
o
f
8
.
1
8
d
eg
r
ee
s
.
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w
ev
er
,
t
h
e
m
ai
n
ta
s
k
o
f
t
h
e
I
P
T
in
th
i
s
co
n
f
i
g
u
r
atio
n
is
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u
ar
a
n
tee
th
at
th
e
v
o
lta
g
es
o
f
t
h
e
t
w
o
1
1
-
p
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ase
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to
tr
a
n
s
f
o
r
m
er
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s
o
u
t
p
u
ts
ar
e
o
p
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atin
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in
d
ep
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d
en
tl
y
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I
n
Fig
u
r
e
2
th
e
p
h
aso
r
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r
a
m
o
f
t
h
e
1
1
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p
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ase
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u
to
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an
s
f
o
r
m
er
f
o
r
th
e
2
8
-
p
u
ls
e
r
ec
ti
f
ier
is
d
ep
icted
.
T
h
e
h
ar
m
o
n
ics
ar
e
eli
m
i
n
ated
w
it
h
a
m
in
i
m
u
m
p
h
ase
d
is
p
lace
m
e
n
t
o
f
8
.
1
8
°.
T
w
o
s
ets
o
f
7
p
h
ases
w
it
h
t
h
e
p
h
ase
s
h
i
f
t
o
f
4
.
0
9
°
ar
e
g
en
er
ated
b
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3.
SI
M
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ase
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atio
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2
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2
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4
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V
b1
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a2
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b2
V
a3
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b3
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a4
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b4
V
a5
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b5
V
a7
V
b7
V
a8
V
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1
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17
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15
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10
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6
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3
V
C
V
B
V
A
V
a6
V
b6
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V
b9
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a
1
0
V
b
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Fig
u
r
e
3
.
Si
m
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li
n
k
m
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f
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ed
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4.
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DA
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4
4
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.
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m
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l
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ase
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ase
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ased
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4
4
P
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ar
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2252
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8792
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4
.
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h
e
Si
m
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li
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k
4
4
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5
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t v
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ase
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4
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6
.
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y
n
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m
ic
r
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o
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I
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ased
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(
a)
6
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P
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4
4
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b
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I
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N
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2252
-
8792
I
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10
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2
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H.
RE
F
E
R
E
NC
E
[1
]
B.
K.
Bo
se
,
“
M
o
d
e
r
n
P
o
w
e
r
El
e
c
t
ro
n
ics
a
n
d
A
C
Driv
e
s,”
S
in
g
a
p
o
r
e
:
Pea
rs
o
n
E
d
u
c
a
ti
o
n
,
1
9
9
8
.
[2
]
IEE
E
S
tan
d
a
rd
5
1
9
-
1
9
9
2
,
“
IEE
E
re
c
o
m
m
e
n
d
e
d
p
ra
c
ti
c
e
s
a
n
d
re
q
u
i
re
m
e
n
ts
f
o
r
h
a
r
m
o
n
ic
c
o
n
tr
o
l
i
n
e
lec
tri
c
a
l
p
o
w
e
r
s
y
ste
m
s,”
Ne
w
Y
o
rk
:
IEE
E
In
c
.
,
1
9
9
2
.
[3
]
IEC
S
tan
d
a
rd
6
1
0
0
0
-
3
-
2
:
2
0
0
4
,
“
L
i
m
it
s
f
o
r
h
a
r
m
o
n
ic
c
u
rre
n
t
e
m
issio
n
s,”
In
ter
n
a
ti
o
n
a
l
El
e
c
tro
me
c
h
a
n
ica
l
Co
mm
issio
n
,
2
0
0
4
.
[4
]
D.
A
.
P
a
ice
,
“
P
o
w
e
r
e
lec
tro
n
ic
c
o
n
v
e
rter
h
a
rm
o
n
ics
:
m
u
lt
ip
u
lse
m
e
th
o
d
s
f
o
r
c
lea
n
p
o
w
e
r,
”
Ne
w
Y
o
rk
:
IEE
E
Pre
ss
,
1
9
9
6
.
[5
]
R.
A
b
d
o
ll
a
h
i
a
n
d
A
.
Ja
li
li
a
n
,
“
A
p
p
li
c
a
ti
o
n
o
f
p
u
lse
d
o
u
b
l
in
g
in
sta
r
-
c
o
n
n
e
c
ted
a
u
to
tran
sf
o
rm
e
r
b
a
se
d
1
2
-
p
u
lse
A
C
-
DC
c
o
n
v
e
rter
f
o
r
p
o
w
e
r
q
u
a
li
ty
im
p
ro
v
e
m
e
n
t,
”
In
ter
n
a
t
io
n
a
l
J
o
u
rn
a
l
o
f
El
e
c
trica
l
a
n
d
El
e
c
tro
n
ics
En
g
i
n
e
e
rin
g
,
v
o
l.
5
,
n
o
.
4,
p
p
.
2
8
0
-
2
8
8
,
2
0
1
1
.
[6
]
D.
A
.
P
a
ice
,
“
F
if
tee
n
-
p
h
a
se
a
u
to
tr
a
n
sf
o
r
m
e
r,
”
U.
S
.
Pa
te
n
t
7
7
1
9
8
5
8
,
M
a
y
2
0
1
0
.
[7
]
B.
S
in
g
h
,
S
.
G
a
iro
la,
B.
N.
S
i
n
g
h
,
A
.
Ch
a
n
d
ra
,
a
n
d
K.
A
l
-
Ha
d
d
a
d
,
“
M
u
l
ti
p
u
lse
A
C
-
DC
c
o
n
v
e
rter
s
f
o
r
i
m
p
ro
v
in
g
p
o
w
e
r
q
u
a
li
ty
:
A
re
v
ie
w
,
”
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
3
,
n
o
.
1
,
p
p
.
2
6
0
-
2
8
1
,
Ja
n
.
2
0
0
8
.
[8
]
B.
S
i
n
g
h
,
G
.
Bh
u
v
a
n
e
sw
a
ri,
a
n
d
V
.
G
a
rg
,
“
Ha
r
m
o
n
ic
m
it
ig
a
ti
o
n
u
sin
g
1
2
-
p
u
lse
AC
-
DC
c
o
n
v
e
rter
in
v
e
c
to
r
-
c
o
n
tro
ll
e
d
i
n
d
u
c
ti
o
n
m
o
to
r
d
riv
e
s,”
IEE
E
T
r
a
n
s.
Po
we
r De
li
v
e
ry
,
v
o
l.
2
1
,
n
o
.
3
,
p
p
.
1
4
8
3
-
1
4
9
2
,
Ju
l.
2
0
0
6
.
[9
]
S
.
Ch
o
i,
P
.
N.
E
n
jeti,
H.
H.
L
e
e
,
a
n
d
I.
J.
P
it
e
l,
“
A
n
e
w
a
c
ti
v
e
in
terp
h
a
se
re
a
c
to
r
f
o
r
1
2
-
p
u
lse
re
c
ti
f
iers
p
ro
v
id
e
s
c
lea
n
p
o
w
e
r
u
ti
li
ty
in
terf
a
c
e
,
”
I
E
EE
T
ra
n
s.
I
n
d
.
Ap
p
l
.
,
v
o
l.
3
2
,
n
o
.
6
,
p
p
.
1
3
0
4
-
1
3
1
1
,
1
9
9
6
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.
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lza
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.
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rs
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li
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ti
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o
c
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d
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n
t.
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.
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.
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3
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4
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5
]
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6
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7
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R.
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rd
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4
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4
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1
9
9
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8
]
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Ka
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9
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0
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Ch
.
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.
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1
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s S
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.
[2
2
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.
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3
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I.
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ra
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V
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rg
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s,
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.
J.
F
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rs
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th
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n
d
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.
J.
C
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e
-
Zab
a
lza
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[2
4
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R.
A
b
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Pa
ten
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8
9
8
2
5
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5
,
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r.
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.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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96
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5
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.
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6
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7
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ter
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8
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i
e
n
c
e
s Jo
u
rn
a
l
,
v
o
l.
2
3
,
n
o
.
3
,
p
p
.
3
9
0
-
4
0
1
,
2
0
1
3
.
[2
9
]
R.
A
b
d
o
ll
a
h
i,
“
Ha
rm
o
n
ic
re
d
u
c
ti
o
n
u
si
n
g
a
n
o
v
e
l
m
u
lt
ip
u
lse
A
C
-
DC
c
o
n
v
e
rter,”
W
o
rld
J
o
u
rn
a
l
o
f
En
g
in
e
e
rin
g
,
v
o
l.
1
5
,
n
o
.
4
,
p
p
.
5
2
0
-
5
3
0
,
2
0
1
8
.
[3
0
]
F
.
M
e
n
g
,
W
.
Ya
n
g
,
Y.
Zh
u
,
L
.
G
a
o
,
a
n
d
S
.
Ya
n
g
,
“
L
o
a
d
a
d
a
p
ta
b
il
it
y
o
f
a
c
ti
v
e
h
a
r
m
o
n
ic
re
d
u
c
ti
o
n
f
o
r
1
2
-
p
u
lse
d
io
d
e
b
ri
d
g
e
re
c
ti
f
ier
w
it
h
a
c
ti
v
e
in
terp
h
a
se
re
a
c
to
r
,
”
IEE
E
T
ra
n
s
.
o
n
Po
we
r
El
e
c
tro
n
,
v
o
l.
3
0
,
n
o
.
1
2
,
p
p
.
7
1
7
0
-
7
1
8
0
,
De
c
.
2
0
1
5
.
[3
1
]
R.
A
b
d
o
ll
a
h
i,
“
T
a
p
p
e
d
d
e
lt
a
a
u
to
t
ra
n
sf
o
r
m
e
r
b
a
s
e
d
4
0
-
p
u
lse
A
C
-
D
C
c
o
n
v
e
rter
w
it
h
re
d
u
c
e
d
k
il
o
v
o
lt
-
a
m
p
e
re
(K
v
a
)
ra
ti
n
g
f
o
r
p
o
w
e
r
q
u
a
li
ty
im
p
ro
v
e
m
e
n
t,
”
S
c
ien
c
e
In
ter
n
a
ti
o
n
a
l
(
L
a
h
o
re
)
,
v
o
l.
2
6
,
n
o
.
4
,
p
p
.
1
8
7
1
-
1
8
7
8
,
2
0
1
4
.
[3
2
]
R.
A
b
d
o
ll
a
h
i,
“
A
sim
p
le
h
a
rm
o
n
ic
re
d
u
c
ti
o
n
m
e
th
o
d
i
n
2
0
-
p
u
lse
A
C
-
DC
c
o
n
v
e
rter,”
J
o
u
rn
a
l
o
f
C
irc
u
it
s,
S
y
ste
ms
a
n
d
Co
m
p
u
ter
s
,
v
o
l.
2
8
,
n
o
.
1
,
p
p
.
1
9
5
0
0
1
3
,
2
0
1
9
.
[3
3
]
C.
M
.
Yo
u
n
g
,
S
.
F
.
W
u
,
W
.
S
.
Y
e
h
,
a
n
d
C
.
W
.
Ye
h
,
“
A
DC
-
sid
e
c
u
rre
n
t
in
jec
ti
o
n
m
e
th
o
d
f
o
r
im
p
ro
v
in
g
A
C
li
n
e
c
o
n
d
i
ti
o
n
a
p
p
li
e
d
i
n
t
h
e
1
8
-
p
u
lse
c
o
n
v
e
rter
s
y
ste
m
,
”
IEE
E
T
ra
n
s.
o
n
Po
we
r
El
e
c
tro
n
.
,
v
o
l.
2
9
,
n
o
.
1
,
p
p
.
9
9
-
1
0
9
,
Ja
n
.
2
0
1
4
.
[3
4
]
T
.
Ra
jes
h
a
n
d
A
.
Nirm
a
lk
u
m
a
r,
“
A
sh
u
n
t
a
c
ti
v
e
p
o
w
e
r
f
il
ter
f
o
r
1
2
p
u
lse
c
o
n
v
e
rter
u
si
n
g
so
u
rc
e
c
u
rre
n
t
d
e
tec
ti
o
n
a
p
p
ro
a
c
h
,
”
I
n
ter
n
a
t
io
n
a
l
J
o
u
rn
a
l
o
f
Po
we
r E
lec
tro
n
ics
a
n
d
Dr
ive
S
y
ste
m
(
IJ
PE
DS
)
,
v
o
l.
7
,
n
o
.
1
,
p
p
.
2
2
5
-
2
3
4
,
M
a
r.
2
0
1
6
.
[3
5
]
N.
M
.
No
rd
in
,
e
t
a
l
.
,
“
Co
n
sta
n
t
f
re
q
u
e
n
c
y
to
rq
u
e
c
o
n
tr
o
ll
e
r
f
o
r
DT
C
w
it
h
m
u
lt
il
e
v
e
l
in
v
e
rter
o
f
in
d
u
c
ti
o
n
m
a
c
h
in
e
s,”
In
ter
n
a
ti
o
n
a
l
J
o
u
r
n
a
l
o
f
Po
we
r
El
e
c
tro
n
ics
a
n
d
Dr
ive
S
y
ste
m
(
I
J
PE
DS
)
,
v
o
l.
7
,
n
o
.
1
,
p
p
.
2
8
-
4
4
,
M
a
r
.
2
0
1
6
.
[3
6
]
K.
V
.
Bi
n
d
u
,
R.
B
.
Ju
stu
s,
“
A
n
o
v
e
l
p
o
w
e
r
f
a
c
to
r
c
o
rre
c
ti
o
n
re
c
ti
f
ier
f
o
r
e
n
h
a
n
c
in
g
p
o
w
e
r
q
u
a
li
ty
,
”
In
ter
n
a
ti
o
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
m (
I
J
PE
DS
)
,
v
o
l.
6
,
n
o
.
4
,
p
p
.
7
7
2
-
7
8
0
,
De
c
.
2
0
1
5
.
[3
7
]
R.
Ba
las
u
b
ra
m
a
n
ian
,
S
.
P
a
lan
i,
“
S
im
u
latio
n
a
n
d
p
e
rf
o
rm
a
n
c
e
e
v
a
lu
a
ti
o
n
o
f
sh
u
n
t
h
y
b
rid
p
o
w
e
r
f
il
ter
f
o
r
p
o
w
e
r
q
u
a
li
ty
im
p
ro
v
e
m
e
n
t
u
sin
g
p
q
th
e
o
ry
,
”
In
ter
n
a
ti
o
n
a
l
J
o
u
rn
a
l
o
f
El
e
c
trica
l
a
n
d
Co
m
p
u
ter
E
n
g
i
n
e
e
rin
g
(
IJ
ECE
)
,
v
o
l.
6
,
n
o
.
6
,
p
p
.
2
6
0
3
-
2
6
0
9
,
De
c
.
2
0
1
6
.
[3
8
]
M
.
T
a
m
il
v
a
n
i,
K.
Nith
y
a
,
a
n
d
M
.
S
rin
iv
a
sa
n
,
“
Ha
r
m
o
n
ic
re
d
u
c
ti
o
n
in
v
a
riab
le
f
re
q
u
e
n
c
y
d
riv
e
s
u
sin
g
a
c
ti
v
e
p
o
w
e
r
f
il
ter
,
”
T
EL
KOM
NIKA
T
e
lec
o
mm
u
n
ica
t
io
n
Co
mp
u
ti
n
g
El
e
c
tro
n
i
c
s
a
n
d
Co
n
tro
l
,
v
o
l.
1
2
,
n
o
.
8
,
p
p
.
5
7
5
8
-
5
7
6
5
,
A
u
g
.
2
0
1
4
.
[3
9
]
A
.
Am
iru
ll
a
h
,
O.
P
e
n
a
n
g
sa
n
g
,
a
n
d
A
.
S
o
e
p
rij
a
n
to
,
“
P
o
w
e
r
q
u
a
li
ty
a
n
a
ly
sis
o
f
in
teg
r
a
ti
o
n
p
h
o
t
o
v
o
lt
a
ic
g
e
n
e
ra
to
r
to
th
re
e
p
h
a
se
g
rid
u
n
d
e
r
v
a
riab
le
so
lar
irrad
ian
c
e
lev
e
l,
”
T
EL
KOM
NIKA
T
e
lec
o
mm
u
n
ica
ti
o
n
C
o
mp
u
ti
n
g
El
e
c
tro
n
ics
a
n
d
Co
n
tro
l
,
v
o
l.
1
4
,
n
o
.
1
,
p
p
.
2
9
-
3
8
,
M
a
r.
2
0
1
6
.
[4
0
]
M
.
T
a
m
il
v
a
n
i,
K.
Nith
y
a
,
M
.
S
rin
iv
a
sa
n
,
a
n
d
S
.
U.
P
ra
b
h
a
,
“
Ha
r
m
o
n
ic
re
d
u
c
ti
o
n
in
v
a
riab
le
f
re
q
u
e
n
c
y
d
riv
e
s
u
sin
g
a
c
ti
v
e
p
o
we
r
f
il
ter,”
Bu
letin
T
e
k
n
ik
El
e
k
tro
d
a
n
In
f
o
rm
a
ti
k
a
(
Bu
ll
e
ti
n
o
f
El
e
c
trica
l
E
n
g
in
e
e
rin
g
a
n
d
In
fo
rm
a
t
ics
)
,
v
o
l.
3
,
n
o
.
2
,
p
p
.
1
1
9
-
1
2
6
,
Ju
n
.
2
0
1
4
.
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