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8792
IJ
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Vo
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co
n
s
i
s
t
o
f
an
I
n
j
ec
tio
n
/B
o
o
s
ter
tr
an
s
f
o
r
m
er
,
a
Har
m
o
n
ic
Fi
lter
,
a
Vo
ltag
e
So
u
r
ce
C
o
n
v
er
ter
(
P
o
w
er
co
n
v
er
ter
)
,
DC
ch
ar
g
i
n
g
cir
c
u
i
t
an
d
C
o
n
tr
o
l
an
d
P
r
o
tectio
n
cir
cu
it
as
s
h
o
w
n
i
n
t
h
e
b
lo
c
k
d
ia
g
r
a
m
o
f
DV
R
in
f
i
g
.
1
.
T
h
e
f
ir
s
t
DVR
w
as
in
s
talled
i
n
No
r
t
h
C
ar
o
lin
a,
f
o
r
th
e
r
u
g
m
an
u
f
a
ctu
r
in
g
i
n
d
u
s
tr
y
[
1
1
]
.
A
n
o
t
h
e
r
w
as
i
n
s
tal
led
to
a
lar
g
e
d
ai
r
y
f
o
o
d
p
r
o
ce
s
s
in
g
p
lan
t
i
n
Au
s
tr
alia
[
1
3
]
.
I
ts
p
r
im
ar
y
f
u
n
c
tio
n
i
s
to
r
ap
id
l
y
b
o
o
s
t
u
p
t
h
e
v
o
lta
g
e
at
l
o
ad
s
id
e
in
ca
s
e
d
i
s
t
u
r
b
an
ce
to
th
at
lo
ad
.
T
h
er
e
ar
e
v
ar
io
u
s
cir
cu
it
to
p
o
lo
g
ies
an
d
co
n
tr
o
l
s
ch
e
m
e
ar
e
u
s
ed
to
i
m
p
l
e
m
en
t
th
e
DV
R
.
I
t
b
asicall
y
co
n
s
i
s
ts
o
f
,
B
atter
y
en
er
g
y
s
to
r
ag
e,
Vo
lta
g
e
So
u
r
ce
I
n
v
er
ter
,
P
ass
iv
e
F
ilter
,
I
n
j
ec
tio
n
/
B
o
o
s
ter
T
r
an
s
f
o
r
m
er
as s
h
o
w
n
i
n
Fi
g
u
r
e
1
.
Fig
u
r
e
1
.
Sch
e
m
atic
d
iag
r
a
m
o
f
DVR.
T
h
e
b
asic
f
u
n
ctio
n
o
f
th
e
D
VR
is
to
d
etec
t
an
y
v
o
ltag
e
s
ag
/s
w
e
ll
o
cc
u
r
r
ed
in
th
e
p
o
wer
lin
e
a
n
d
in
j
ec
ts
th
e
b
alan
ce
v
o
lta
g
e
f
r
o
m
th
e
D
VR
.
T
h
is
is
ac
h
ie
v
ed
eith
er
b
y
ab
s
o
r
b
in
g
o
r
in
j
ec
tin
g
ac
tiv
e
o
r
r
ea
ctiv
e
p
o
w
er
[
9
]
.
2
.
1.
DC
ener
g
y
Sto
ra
g
e
dev
ice
I
t
is
u
s
ed
to
s
u
p
p
l
y
t
h
e
r
ea
l
p
o
w
er
r
eq
u
ir
e
m
e
n
t
f
o
r
th
e
co
m
p
en
s
atio
n
d
u
r
in
g
v
o
lta
g
e
s
a
g
.
L
ea
d
-
ac
id
b
atter
ies,
Su
p
er
C
o
n
d
u
c
tin
g
Ma
g
n
e
tic
E
n
er
g
y
S
to
r
ag
e
(
S
ME
S),
Fl
y
w
h
ee
l
s
a
n
d
S
u
p
er
c
ap
ac
ito
r
s
ca
n
b
e
u
s
ed
as
t
h
e
s
to
r
ag
e
d
ev
ice
s
.
Fo
r
DC
d
r
iv
e
s
s
u
c
h
as
ca
p
ac
ito
r
s
,
b
atter
ies
a
n
d
SME
S,
DC
to
AC
co
n
v
er
s
io
n
(
in
v
er
ter
s
)
ar
e
n
ee
d
ed
to
d
eliv
er
p
o
w
er
,
w
h
er
ea
s
f
o
r
f
l
y
w
h
ee
l,
AC
to
AC
co
n
v
er
s
io
n
i
s
r
eq
u
ir
ed
[
4
,
5
,
an
d
8
]
.
T
h
e
m
a
x
i
m
u
m
co
m
p
en
s
atio
n
ab
ilit
y
o
f
DVR
p
ar
tic
u
l
ar
f
o
r
v
o
ltag
e
s
a
g
i
s
d
ep
en
d
en
t
o
n
th
e
ac
tiv
e
p
o
w
er
s
u
p
p
lied
b
y
th
e
e
n
er
g
y
s
to
r
ag
e
d
ev
ices.
2
.
2.
Vo
lt
a
g
e
So
urce
I
nv
er
t
er
(
VS
I
)
T
h
e
b
asic
f
u
n
c
tio
n
VSI
is
to
co
n
v
er
t
DC
v
o
lta
g
e
s
u
p
p
lied
b
y
t
h
e
en
er
g
y
s
to
r
ag
e
d
ev
ice
to
an
AC
v
o
ltag
e.
T
h
is
is
co
u
p
led
to
an
in
j
ec
tio
n
tr
an
s
f
o
r
m
er
to
th
e
m
ain
s
y
s
te
m
.
T
h
u
s
a
VSI
w
it
h
l
o
w
v
o
lta
g
e
r
atin
g
is
s
u
f
f
icie
n
t [
4
,
8
]
.
2
.
3
.
P
a
s
s
iv
e
F
ilte
r
I
t
is
u
s
ed
to
co
n
v
er
t
P
W
M
p
u
ls
e
w
a
v
e
f
o
r
m
i
n
to
s
in
u
s
o
id
al
w
a
v
e
f
o
r
m
.
I
t
co
n
s
i
s
ts
o
f
a
n
in
d
u
cto
r
an
d
a
ca
p
ac
ito
r
.
I
t
ca
n
b
e
p
lace
d
eith
er
h
i
g
h
v
o
lta
g
e
s
id
e
o
r
lo
w
v
o
ltag
e
s
id
e
o
f
t
h
e
i
n
j
ec
tio
n
tr
an
s
f
o
r
m
er
.
B
y
p
lacin
g
it
i
n
v
er
ter
s
id
e
h
i
g
h
er
o
r
d
er
h
ar
m
o
n
ic
s
a
r
e
p
r
ev
e
n
te
d
f
r
o
m
p
as
s
i
n
g
t
h
r
o
u
g
h
t
h
e
v
o
ltag
e
tr
a
n
s
f
o
r
m
er
.
An
d
it
w
i
ll
r
ed
u
ce
s
tr
ess
o
n
t
h
e
i
n
j
ec
tio
n
tr
an
s
f
o
r
m
er
.
W
h
e
n
t
h
e
f
ilter
is
p
lace
d
o
n
th
e
h
i
g
h
v
o
lta
g
e
s
id
e,
t
h
e
Evaluation Warning : The document was created with Spire.PDF for Python.
IJ
A
P
E
I
SS
N:
2252
-
8792
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-
S
o
u
r
ce
I
n
ve
r
ter b
a
s
ed
Dyn
a
mic
V
o
lta
g
e
R
esto
r
er fo
r
th
e
Mit
ig
a
tio
n
o
f
V
o
lta
g
e
(
K
.
P
r
a
mee
la
)
89
h
ig
h
er
o
r
d
er
h
ar
m
o
n
ic
c
u
r
r
en
t
d
o
p
en
etr
ate
to
t
h
e
s
ec
o
n
d
ar
y
s
id
e
o
f
th
e
tr
an
s
f
o
r
m
er
,
a
h
ig
h
er
r
atin
g
o
f
t
h
e
tr
an
s
f
o
r
m
er
is
r
eq
u
ir
ed
[
4
,
8
]
.
2
.
4.
Vo
lt
a
g
e
I
nje
ct
io
n T
ra
ns
f
o
r
m
er
T
h
e
b
asic
f
u
n
ctio
n
is
to
i
n
cr
ea
s
e
t
h
e
v
o
ltag
e
s
u
p
p
lied
b
y
t
h
e
f
il
ter
ed
VSI
o
u
tp
u
t
to
th
e
d
es
ir
ed
lev
el.
T
h
e
h
ig
h
v
o
lta
g
e
s
id
e
o
f
th
e
in
j
ec
tio
n
tr
a
n
s
f
o
r
m
er
is
co
n
n
ec
ted
i
n
s
er
ie
s
to
t
h
e
d
i
s
tr
ib
u
tio
n
li
n
e
a
n
d
lo
w
v
o
ltag
e
s
id
e
i
s
co
n
n
ec
ted
to
t
h
e
p
o
w
er
cir
cu
it
o
f
th
e
DV
R
.
I
n
t
h
is
s
t
u
d
y
s
i
n
g
le
p
h
a
s
e
i
n
j
ec
tio
n
tr
a
n
s
f
o
r
m
er
i
s
u
s
ed
.
Fo
r
th
r
ee
h
a
s
DVR,
t
h
r
ee
s
in
g
le
p
h
ase
tr
a
n
s
f
o
r
m
er
c
an
b
e
co
n
n
ec
ted
eit
h
er
in
d
elt
a/o
p
en
o
r
s
tar
/o
p
en
co
n
f
i
g
u
r
atio
n
.
2
.
5.
By
-
pa
s
s
Sw
it
ch
T
h
e
DVR
is
s
er
ies
co
n
n
ec
ted
d
ev
ice,
if
f
a
u
lt
c
u
r
r
en
t
t
h
at
o
c
cu
r
d
u
e
to
f
au
l
t
i
n
th
e
d
o
w
n
s
t
r
ea
m
w
il
l
f
lo
w
th
r
o
u
g
h
t
h
e
in
v
er
ter
cir
cu
it
[
1
0
]
.
T
h
e
p
o
w
er
elec
tr
o
n
ic
co
m
p
o
n
e
n
t
ar
e
r
ated
to
th
e
lo
ad
cu
r
r
en
t
h
e
n
ce
t
o
p
r
o
tect
th
e
in
v
er
ter
f
r
o
m
h
ig
h
e
r
cu
r
r
en
t,
a
b
y
-
p
as
s
s
w
i
tch
i
s
u
s
ed
an
d
it is
lo
ca
ted
b
et
w
ee
n
t
h
e
in
v
er
ter
an
d
t
h
e
is
o
latin
g
tr
an
s
f
o
r
m
er
.
3
.
DVR
O
P
E
RA
T
I
N
G
S
T
A
T
E
S
Du
r
in
g
t
h
e
n
o
r
m
a
l o
p
er
atio
n
Un
d
er
n
o
r
m
al
w
o
r
k
i
n
g
co
n
d
i
tio
n
DV
R
is
n
o
t
i
n
j
ec
tin
g
a
n
y
v
o
lt
a
g
e
to
t
h
e
s
y
s
te
m
.
I
f
t
h
e
en
er
g
y
d
ev
ice
is
f
u
ll
y
c
h
ar
g
ed
th
e
n
t
h
e
DVR o
p
er
ates in
s
ta
n
d
b
y
m
o
d
e
o
r
in
th
e
s
el
f
-
ch
ar
g
i
n
g
m
o
d
e.
Du
r
in
g
a
Vo
lta
g
e
s
a
g
/s
w
el
l
B
y
s
u
p
p
l
y
in
g
t
h
e
r
ea
l
p
o
w
er
f
r
o
m
t
h
e
en
er
g
y
s
to
r
ag
e
d
ev
i
ce
to
g
eth
er
w
it
h
t
h
e
r
ea
cti
v
e
p
o
w
er
,
th
e
DVR i
n
j
ec
ts
th
e
d
if
f
er
e
n
ce
b
etw
ee
n
th
e
p
r
e
-
s
a
g
an
d
s
a
g
v
o
lt
ag
e
[
6
]
.
Fau
lt i
n
t
h
e
d
o
w
n
s
tr
ea
m
o
f
t
h
e
p
o
w
er
li
n
e
I
n
th
i
s
ca
s
e,
b
y
-
p
as
s
s
w
itc
h
is
o
p
er
ated
an
d
p
r
o
v
id
e
alter
n
ati
v
e
p
ath
f
o
r
th
e
h
i
g
h
f
a
u
lt c
u
r
r
e
n
ts
.
I
f
t
h
is
h
ig
h
f
au
l
t
cu
r
r
en
t
f
lo
w
s
t
h
r
o
u
g
h
th
e
i
n
v
er
ter
,
it
m
a
y
d
a
m
ag
e
t
h
e
s
e
n
s
it
iv
e
p
o
w
er
elec
tr
o
n
ic
co
m
p
o
n
e
n
t.
4
.
E
XI
ST
I
N
G
VO
L
T
A
G
E
S
A
G
/S
WE
L
L
M
I
T
I
G
A
T
I
O
N
T
E
CH
NI
Q
U
E
I
n
m
o
s
t
o
f
t
h
e
p
u
b
lis
h
ed
w
o
r
k
o
n
DV
R
,
R
e
f
er
en
ce
v
o
l
tag
e
g
e
n
er
atio
n
ar
e
ac
h
ie
v
ed
u
s
i
n
g
p
q
r
p
o
w
er
th
eo
r
y
,
d
q
tr
an
s
f
o
r
m
ati
o
n
[
1
2
]
,
f
u
zz
y
lo
g
ic
co
n
tr
o
l
,
s
lid
in
g
m
o
d
e
co
n
tr
o
l,
A
r
tific
ial
n
e
u
r
al
n
e
t
w
o
r
k
an
d
s
o
f
t
w
ar
e
P
L
L
.
Ge
n
er
all
y
o
p
en
lo
o
p
f
ee
d
f
o
r
w
ar
d
co
n
tr
o
l
is
p
r
ef
er
r
ed
to
m
ee
t
th
e
f
as
t
co
m
p
e
n
s
atio
n
r
eq
u
ir
e
m
en
t
.
T
h
e
p
r
esen
ce
o
f
p
ass
i
v
e
L
C
f
ilter
,
s
at
u
r
atio
n
o
f
s
er
ies
i
n
j
ec
tio
n
tr
an
s
f
o
r
m
er
an
d
th
e
v
o
lta
g
e
d
r
o
p
ac
r
o
s
s
th
e
i
n
d
u
cto
r
a
f
f
ec
t
th
e
p
er
f
o
r
m
a
n
ce
o
f
DV
R
i
n
o
p
en
lo
o
p
co
n
tr
o
l.
T
h
e
L
o
ad
v
o
ltag
e
m
a
y
n
o
t
b
e
co
m
p
e
n
s
ated
to
t
h
e
d
esire
d
v
alu
e
i
n
o
p
en
lo
o
p
f
ee
d
f
o
r
w
a
r
d
co
n
tr
o
l.
C
lo
s
ed
lo
o
p
co
n
tr
o
l
ca
n
r
ed
u
ce
t
h
e
d
am
p
i
n
g
o
s
cillatio
n
ca
u
s
ed
b
y
th
e
s
w
itc
h
i
n
g
h
ar
m
o
n
ics
L
C
f
il
ter
b
u
t
n
o
t
ca
tc
h
in
g
u
p
w
it
h
f
ast
d
y
n
a
m
ic
r
esp
o
n
s
e.
I
n
t
h
e
d
q
o
tr
an
s
f
o
r
m
atio
n
m
et
h
o
d
,
th
e
q
u
a
n
ti
ties
ar
e
ex
p
r
ess
ed
as
t
h
e
in
s
ta
n
ta
n
eo
u
s
s
p
ac
e
v
ec
to
r
s
.
First
t
h
r
ee
p
h
a
s
e
v
o
ltag
e
s
(
Va
,
Vb
,
Vc)
ar
e
co
n
v
er
ted
to
s
ta
tio
n
ar
y
r
e
f
er
en
ce
f
r
a
m
e
V
α
a
n
d
Vβ
an
d
th
e
n
it
is
co
n
v
er
ted
to
d
-
q
-
o
r
ef
er
en
ce
.
Du
r
in
g
a
f
a
u
lt
t
h
ese
d
c
v
alu
e
s
w
ill
d
r
o
p
an
d
th
e
d
if
f
er
en
ce
b
et
w
ee
n
th
e
p
r
e
-
s
a
g
an
d
s
ag
g
ed
v
al
u
e
w
i
ll
f
o
r
m
a
n
er
r
o
r
s
ig
n
al.
T
h
is
er
r
o
r
s
ig
n
al
is
th
en
co
n
v
er
ted
b
ac
k
to
Vα
an
d
Vβ
w
h
ich
i
s
ag
ain
m
o
d
u
lated
u
s
i
n
g
s
p
ac
e
v
ec
to
r
m
o
d
u
latio
n
to
p
r
o
d
u
ce
th
e
r
eq
u
ir
ed
p
u
ls
e
to
s
w
itc
h
o
n
t
h
e
i
n
v
er
ter
th
u
s
r
esto
r
in
g
t
h
e
lo
ad
v
o
lta
g
e
.
T
h
is
m
et
h
o
d
is
ap
p
licab
le
o
n
l
y
to
th
r
ee
p
h
ase
s
y
s
te
m
.
T
h
e
co
m
p
u
tatio
n
s
ar
e
in
s
ta
n
ta
n
eo
u
s
b
u
t i
n
cu
r
ti
m
e
d
ela
y
s
i
n
f
ilter
i
n
g
d
c
q
u
a
n
tit
y
.
5
.
P
RO
P
O
SE
D
CO
M
P
E
NSAT
I
O
N
T
E
CH
NI
Q
U
E
T
h
e
b
asic
f
u
n
ctio
n
s
o
f
a
co
n
tr
o
ller
in
a
DV
R
ar
e
th
e
(
i)
d
et
ec
tio
n
o
f
v
o
ltag
e
s
a
g
/s
w
el
l
ev
en
ts
i
n
t
h
e
s
y
s
te
m
(
ii)
co
m
p
u
tatio
n
o
f
th
e
co
r
r
ec
tin
g
v
o
lta
g
e
a
n
d
(
iii)
g
e
n
er
atio
n
o
f
tr
i
g
g
er
p
u
ls
e
s
to
th
e
s
i
n
u
s
o
id
al
P
W
M
b
ased
DC
-
AC
i
n
v
er
ter
.
I
n
o
r
d
er
to
m
iti
g
ate
t
h
e
s
i
m
u
lated
v
o
ltag
e
s
a
g
/
s
w
ell
a
Di
s
cr
ete
P
W
M
-
b
ased
co
n
tr
o
l
s
ch
e
m
e
is
i
m
p
le
m
en
ted
.
T
h
is
co
n
tr
o
l s
y
s
te
m
o
n
l
y
m
ea
s
u
r
es t
h
e
r
m
s
v
o
lta
g
e
at
lo
ad
p
o
in
t a
n
d
ex
er
ts
v
o
lta
g
e
an
g
l
e
co
n
tr
o
l
as
f
o
llo
w
s
:
a
n
er
r
o
r
s
ig
n
al
is
o
b
tain
ed
b
y
co
m
p
ar
in
g
th
e
r
e
f
er
en
ce
v
o
lta
g
e
w
it
h
t
h
e
r
m
s
v
o
lta
g
e
m
ea
s
u
r
ed
at
t
h
e
lo
ad
p
o
in
t.
T
h
e
P
I
co
n
tr
o
ller
p
r
o
ce
s
s
es
t
h
e
er
r
o
r
s
ig
n
al
a
n
d
g
en
er
ate
s
t
h
e
r
eq
u
ir
ed
an
g
le
δ
to
d
r
iv
e
th
e
er
r
o
r
to
ze
r
o
.
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n
th
e
P
W
M
g
en
er
ato
r
s
,
th
e
s
i
n
u
s
o
id
al
s
ig
n
al,
Vco
n
tr
o
l,
is
p
h
ase
m
o
d
u
lated
b
y
m
ea
n
s
o
f
t
h
e
a
n
g
le
δ
o
r
d
elta
.
T
h
e
m
o
d
u
lated
s
ig
n
al,
Vco
n
tr
o
l,
i
s
co
m
p
ar
ed
ag
a
in
s
t
a
tr
ian
g
u
l
ar
s
ig
n
al
(
ca
r
r
ier
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in
o
r
d
er
to
g
en
er
ate
th
e
s
w
i
tch
i
n
g
s
i
g
n
al
s
o
f
th
e
V
SC
v
al
v
e
s
.
T
h
e
m
ai
n
p
ar
a
m
ete
r
s
o
f
th
e
s
in
u
s
o
id
al
P
W
M
s
ch
e
m
e
ar
e
th
e
a
m
p
lit
u
d
e
m
o
d
u
latio
n
in
d
e
x
,
m
a,
o
f
s
i
g
n
al
V
co
n
tr
o
l,
an
d
th
e
f
r
eq
u
en
c
y
m
o
d
u
latio
n
i
n
d
ex
,
m
f
,
o
f
t
h
e
tr
ian
g
u
lar
s
ig
n
al.
T
h
e
am
p
lit
u
d
e
in
d
ex
m
a
i
s
k
ep
t
f
ix
ed
at
1
p
u
,
in
o
r
d
er
t
o
o
b
tain
th
e
h
ig
h
es
t
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8792
IJ
A
P
E
Vo
l.
5
,
No
.
2
,
A
u
g
u
s
t
2
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1
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:
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–
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90
f
u
n
d
a
m
en
ta
l
v
o
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g
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p
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n
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h
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as
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m
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tio
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n
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atin
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ar
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e.
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h
e
m
o
d
u
lati
n
g
a
n
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el
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e
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g
e
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e
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ato
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s
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p
h
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h
er
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s
t
h
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g
les
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o
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h
ase
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ar
e
s
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i
f
ted
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y
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4
0
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r
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1
2
0
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d
1
2
0
° r
esp
ec
tiv
el
y
.
Va
=
Sin
(
ω
t +
δ)
(
1
)
Vb
=
Sin
(
ω
t+δ
-
2
π/3
)
(
2
)
Vc
=
Sin
(
ω
t +
δ+2
π/3
)
(
3
)
I
t
ca
n
b
e
s
ee
n
t
h
at
t
h
e
co
n
tr
o
l
i
m
p
le
m
en
tatio
n
i
s
k
ep
t
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er
y
s
i
m
p
le
b
y
u
s
in
g
o
n
l
y
v
o
lta
g
e
m
ea
s
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r
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m
e
n
t
s
as
f
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b
ac
k
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ar
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le
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t
h
e
co
n
t
r
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l
s
ch
e
m
e.
T
h
e
s
p
ee
d
o
f
r
esp
o
n
s
e
an
d
r
o
b
u
s
tn
e
s
s
o
f
t
h
e
co
n
tr
o
l
s
ch
e
m
e
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clea
r
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s
h
o
w
n
in
t
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s
i
m
u
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ti
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n
r
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l
ts
.
Si
n
ce
c
u
s
to
m
p
o
w
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is
a
r
elativ
e
l
y
lo
w
p
o
w
er
ap
p
licatio
n
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m
et
h
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t
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w
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h
s
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f
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e
n
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ca
n
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e
u
s
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m
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h
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n
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g
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6
.
Z
-
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I
NV
E
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o
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in
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as
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h
ap
ed
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m
p
ed
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n
et
w
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it
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s
id
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w
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in
ter
f
ac
e
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t
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e
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r
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d
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ter
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t
f
ac
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s
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lta
g
e
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d
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ca
p
ab
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ies.
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h
e
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ce
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h
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p
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l
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r
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ter
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r
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r
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g
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2
s
h
o
w
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th
e
g
e
n
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al
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lo
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k
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r
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m
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u
r
e
2
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ated
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Fig
u
r
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3.
P
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W
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.
Evaluation Warning : The document was created with Spire.PDF for Python.
IJ
A
P
E
I
SS
N:
2252
-
8792
Z
-
S
o
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lt
s
d
u
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lt
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ltag
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a
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.
1.
Vo
lt
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g
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w
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h
e
th
r
ee
p
h
ase
v
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ltag
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i
m
u
lated
f
o
r
0
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5
m
s
ec
f
r
o
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t=0
m
s
ec
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t=0
.
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m
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s
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h
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w
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i
n
Fig
u
r
e
5
.
T
h
e
DVR
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eg
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iate
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Fig
u
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.
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Fig
u
r
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5
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m
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Sa
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Fig
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Fig
u
r
e
6
.
Si
m
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cir
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f
Vo
ltag
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s
a
g
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m
p
en
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atio
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u
s
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n
g
D
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.
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I
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IJ
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ase
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Fig
u
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.
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ter
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u
r
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MA
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Fig
u
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9
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m
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latio
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o
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t
h
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ase
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n
v
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ter
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IJ
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ased
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e
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ter
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ased
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R
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n
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n
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n
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th
e
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m
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tp
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m
ai
n
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n
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itio
n
.
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h
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s
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m
u
latio
n
r
esu
lt
s
s
h
o
w
th
at
th
i
s
co
n
tr
o
l
tech
n
iq
u
e
c
o
m
p
e
n
s
ate
s
f
o
r
th
e
v
o
ltag
e
s
ag
/
s
w
ell
a
n
d
its
e
x
ce
l
len
t p
er
f
o
r
m
a
n
ce
s
.
RE
F
E
R
E
NC
E
S
[1
]
M
.
H.J
Bo
ll
e
n
„U
n
d
e
rsta
n
d
in
g
P
o
w
e
r
Qu
a
li
ty
P
ro
b
lem
s
:
V
o
lt
a
g
e
sa
g
a
n
d
In
terru
p
ti
o
n
s”
Ne
w
Yo
rk
IEE
E
P
re
ss
,
1
9
9
9
[2
]
J.C.
sm
it
h
J.L
a
m
o
re
e
,
P
.
V
i
n
e
tt
,
T
.
Du
f
fy
M
.
Kle
in
“
T
h
e
im
p
a
c
t
o
f
v
o
lt
a
g
e
sa
g
In
d
u
stri
a
l
p
l
a
n
t
lo
a
d
”
In
ter
n
a
ti
o
n
a
l
Co
n
f
e
re
n
c
e
P
o
w
e
r
q
u
a
li
ty
e
n
d
u
se
a
p
p
li
c
a
ti
o
n
a
n
d
p
e
rsp
e
c
ti
v
e
p
p
1
7
1
-
1
7
8
.
[3
]
Ak
a
g
i
H,
”
Ne
w t
re
n
d
s in
a
c
ti
v
e
f
i
lt
e
rs
f
o
r
p
o
w
e
r
c
o
n
d
it
i
o
n
i
n
g
”
IEE
E
T
ra
n
sa
c
ti
o
n
In
d
.
A
p
p
li
c
a
ti
o
n
,
v
o
l
3
2
p
p
1
3
1
2
-
1
3
2
2
N
o
v
/De
c
1
9
9
6
[4
]
G
h
o
sh
A
a
n
d
L
e
d
w
ich
G
(2
0
0
2
)
“
P
o
w
e
r
q
u
a
li
ty
En
h
a
n
c
e
m
e
n
t
u
sin
g
Cu
sto
m
P
o
w
e
r
De
v
ic
e
s”
.
Kl
u
w
r
A
c
a
d
e
m
ics
p
u
b
li
sh
e
rs,
Un
it
e
d
S
tate
s
[5
]
O.
A
n
a
y
a
-
L
a
ra
,
E.
Ac
h
a
,
“
M
o
d
e
li
n
g
a
n
d
A
n
a
l
y
sis
o
f
C
u
sto
m
P
o
we
r
S
y
ste
m
s
b
y
P
S
CA
D/EM
T
D
C,
”
IEE
E
T
ra
n
s.,
P
o
w
e
r
De
li
v
e
r
y
,
P
W
DR v
o
l
-
1
7
(1
),
p
p
.
2
6
6
-
2
7
2
,
2
0
0
2
.
[6
]
H.
Hin
g
o
ra
n
i
“
I
n
tro
d
u
c
i
n
g
c
u
sto
m
p
o
we
r”
IEE
E
sp
e
c
tru
m
,
v
o
l.
3
2
n
o
.
6
Ju
n
e
1
9
9
5
p
4
1
-
4
8
.
[7
]
Jo
h
n
S
to
n
e
s an
d
A
lan
Co
ll
i
n
sio
n
“
In
tro
d
u
c
ti
o
n
t
o
P
o
w
e
r
Qu
a
li
ty
”
p
o
w
e
r
e
n
g
in
e
e
rin
g
jo
u
r
n
a
l
2
0
0
1
p
a
g
e
s: 5
8
-
6
4
.
[8
]
G
re
g
o
r
y
F
.
Re
e
d
,
M
a
sa
to
sh
i
T
a
k
e
d
a
,
"
I
m
p
ro
v
e
d
p
o
w
e
r
q
u
a
li
ty
so
l
u
ti
o
n
s
u
sin
g
a
d
v
a
n
c
e
d
so
li
d
-
sta
te
sw
it
c
h
in
g
a
n
d
sta
ti
c
c
o
m
p
e
n
sa
ti
o
n
tec
h
n
o
lo
g
ies
,
"
P
o
w
e
r
En
g
in
e
e
rin
g
S
o
c
iety
1
9
9
9
W
in
ter M
e
e
ti
n
g
,
IE
EE
[9
]
N.G
.
Hin
g
o
ra
n
i
a
n
d
L
.
Gy
u
g
y
i,
“
Un
d
e
rsta
n
d
i
n
g
F
A
C
T
S
:
Co
n
c
e
p
ts
a
n
d
T
e
c
h
n
o
l
o
g
y
o
f
F
lex
ib
le
AC
T
ra
n
s
m
i
ss
io
n
S
y
st
e
m
s”
,
1
st ed
it
io
n
,
T
h
e
In
stit
u
t
e
o
f
El
e
c
tri
c
a
l
a
n
d
El
e
c
tro
n
ics
En
g
in
e
e
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