Int
ern
at
i
onal
Journ
al of
P
ower E
l
ectr
on
i
cs a
n
d
Drive
S
ystem
(I
J
PE
D
S
)
Vo
l.
11
,
No.
4
,
Decem
be
r 202
0
, p
p.
2126
~
2134
IS
S
N:
20
88
-
8694
,
DOI: 10
.11
591/
ij
peds
.
v11.i
4
.
pp2
126
-
2134
2126
Journ
al h
om
e
page
:
http:
//
ij
pe
ds
.i
aescore.c
om
Hybrid
uni
fied
power
quality
con
ditioner
fo
r power
quality
enhanc
em
en
t
Dj
el
lo
uli
D
j
oudi
, Ben
ou
d
jaf
er Ch
eri
f,
T
oumi
Toufi
k, Ot
hma
ne
Abdel
kha
le
k
Facul
ty
of Tec
h
nology
,
Sm
art Grids
&
R
ene
wab
l
e
En
erg
i
es
La
bo
rat
ory
,
Univer
si
t
y
of
T
ahr
i
Moha
mm
ed
,
Alg
er
ia
Art
ic
le
In
f
o
ABSTR
A
CT
Art
ic
le
history:
Re
cei
ved
Ja
n
4
, 20
20
Re
vised
A
pr
3
,
20
20
Accepte
d
J
ul
1
3
, 2
0
20
In
a
low
-
vol
ta
g
e
el
e
ct
r
ic
a
l
ne
twork,
har
moni
cs
,
rea
c
ti
ve
power,
the
cu
rre
nt
and
voltage
im
b
al
an
ce,
and
voltage
d
ips
have
h
arm
ful
eff
ec
ts
o
n
elec
t
r
ica
l
equi
pm
ent
s.
To
over
come
th
es
e
problems,
t
he
hybrid
UP
QC
is
proposed.
Thi
s
pape
r
disc
uss
es
the
structure
o
f
passive
f
il
te
rs
,
par
al
l
el
a
ct
iv
e
filters,
seria
l
and
co
m
bine
s
(UP
QC)
t
o
study
the
co
mpe
nsati
on
of
al
l
typ
es
of
disturba
nc
es
l
ik
el
y
to
appear
in
the
grid
.
Furth
erm
ore
,
the
a
im
of
r
educing
the
siz
e,
cost
of
UP
QC
is
to
im
prove
the
qu
ality
of
el
e
ct
ri
c
powe
r,
ma
k
ing
i
t
in
com
pl
ia
nc
e
with
th
e
new
re
gula
tory
constr
a
int
s,
we
p
ropose
d
th
e
hybr
id
UP
QC
which
uses
passive
fi
lt
e
rs
and
a
com
b
i
nat
ion
o
f
a
ct
iv
e
fil
t
ers.
To
val
id
at
e
the
pro
posed
topol
ogy
,
seve
ra
l
sags
of
source
vol
ta
g
e
have
b
ee
n
appl
i
ed,
at
th
e
p
oint
of
c
o
mm
on
coupl
ing
(PCC
).
The
simu
la
t
ion
result
s
from
MA
TL
AB/
Simul
ink
are di
scuss
e
d
to
v
eri
fy
the pr
oposed
topol
ogy
.
Ke
yw
or
d
s
:
Ele
ct
rical
p
ow
er
qu
al
ity
Harmo
nics
Parall
el
acti
ve fil
te
r
Series act
ive
f
i
lt
er
UPQC
This
is an
open
acc
ess arti
cl
e
un
der
the
CC
BY
-
SA
l
ic
ense
.
Corres
pond
in
g
Aut
h
or
:
Djel
lou
li
D
j
ou
di,
Dep
a
rtme
nt of
Ele
ct
ri
cal
En
gi
neer
i
ng,
Tahr
i
Mo
ham
med U
niv
e
rsity
of b
ec
har,
Alger
ia
,
The
i
nd
e
pe
nd
e
nce street,
PB
417
Bé
c
har
Al
ger
ia
.
Emai
l:
d
je
ll
ou
l
i.djo
ud
i
@y
a
ho
o.
c
om
1.
INTROD
U
CTION
Power
el
ect
r
on
ic
s
-
base
d
s
ys
te
ms
are
the
m
ost
non
-
li
near
l
oads
cu
rr
e
ntly
ans
wer
e
d.
Th
ese
sy
ste
m
s
are
inc
reasin
gl
y
ca
us
in
g
pow
er
gr
i
d
disturb
ances,
suc
h
as
ha
rm
on
ic
dist
or
ti
ons,
im
balances,
flic
ke
r,
bri
ef
interr
up
ti
ons
,
vo
lt
age
dip
s,
a
nd
te
mpo
rary
and
tra
ns
ie
nt
ov
e
r
volt
ages.
I
n
a
dd
it
io
n,
t
hese
distu
rb
a
nc
es
can
gen
e
rate
nuisa
nce
or
da
ma
ge
by
t
he
assi
gn
ment
of
on
e
or
more
par
a
me
te
rs
of
t
he
volt
age
of
the
el
ec
tric
a
l
netw
ork,
s
uc
h
as
the
f
reque
nc
y,
the
a
mp
li
tu
de
,
the
s
ym
metr
y
of
the
t
hr
ee
-
ph
a
se
volt
ages
and
t
he
sha
pe
of
t
he
wav
e
.
Se
ver
al
so
luti
ons
for
the
dec
onta
min
at
ion
of
el
ect
ri
ci
ty
netw
orks
hav
e
al
re
ad
y
be
en
pr
opos
e
d
i
n
the
li
te
ratur
e.
T
ho
se
that
be
st
m
eet
tod
a
y's
in
dustria
l
co
ns
trai
nts
are
t
he
Acti
ve
S
hunt
Co
mp
e
ns
at
or,
Ser
ie
s
and
Acti
ve
Shu
nt
Com
bin
at
io
n
S
eries
(
al
so
kn
own
as
U
PQ
C
).
The
act
ive
pas
sive
s
hunt
filt
ers
a
re
a
n
in
dis
pu
ta
ble
so
luti
on
onl
y
i
n
hi
gh
vo
lt
a
ge
transmissi
on
l
ines
[
1,
2].
H
oweve
r,
in
al
l
ot
her
cases,
i
nclud
i
ng
t
he
sup
pl
y
of
industrial
loa
ds
an
d
me
dium
and
lo
w
volt
ag
e
distrib
utio
n
l
ines,
passive
fi
lt
ers
enc
ounter
mu
lt
iple
diff
ic
ulti
es
that
degrad
e
t
heir
ef
fici
enc
y.
Acti
ve
filt
ers
ha
v
e
been
de
sign
e
d
to
mit
igate
t
he
pro
bl
ems
of
passi
ve
filt
ers.
Howe
ver,
thes
e
act
ive
filt
ers
us
e
d
al
one
ha
ve
certai
n
dra
w
backs
su
c
h
as:
the
low
e
ff
ic
ie
ncy,
the
li
mit
at
ion
of
the h
i
gh
-
power ba
ndwidt
h
a
nd the
r
el
at
ively
h
ig
h
a
ppare
nt
powe
r of
t
he
a
ct
ive f
il
te
r
. [3
-
5
]
Althou
gh
act
iv
e
filt
ers
us
e
d
a
lon
e
are
us
ef
ul
in
some
ap
plica
ti
on
s,
it
is
some
ti
mes
neces
sary
to
us
e
hybri
d
to
polo
gi
es
with
passi
ve
filt
ers
a
nd
act
ive
filt
ers.
Hybr
i
d
filt
ers
treat
an
d
mit
igate
pro
blems
with
passive
a
nd acti
ve
filt
ers.
In a
dd
it
io
n,
the
h
ybri
d
act
ive f
il
te
rs
imp
rove th
e
com
pensat
ion
char
act
e
risti
cs o
f
the
passive
filt
ers
wh
ic
h
ca
n
le
a
d
to
a
re
duct
ion
of
th
e
power
of
the
act
ive
filt
er.
T
her
e
fore,
the
hybri
d
str
uctu
re
aro
se
from
t
he
need
for
im
pro
ve
d
pe
rform
ance
an
d
redu
ced
co
st
of
ac
t
ive
fi
lt
ers.
H
ybrid
filt
ers
pr
ov
i
de
Evaluation Warning : The document was created with Spire.PDF for Python.
In
t J
P
ow Elec
& Dri S
ys
t
IS
S
N: 20
88
-
8
694
Hyb
ri
d u
nifi
ed po
we
r
qu
alit
y conditi
on
e
r for
power
qualit
y
enha
ncem
e
nt
(
Djel
lou
li
D
j
ou
di)
2127
op
ti
mal
so
l
ution
for
P
Q
mit
igati
on
with
r
edu
ce
d
c
os
t,
s
imple
desig
n
and
c
ontrol
wi
th
high
reli
abi
li
ty
f
or
PQ
im
pro
veme
nt [6].
The
pur
pose
of
this
pa
per
is
to
c
ontrib
ute
to
im
prov
i
ng
t
he
performa
nc
e
of
c
urren
t
a
nd
volt
age
distu
r
ba
nce
c
ompe
ns
at
io
n
from
a
par
al
le
l
-
series
c
ombin
ed
str
uctu
re
(
UPQC).
T
he
act
ive
pa
rall
el
-
serial
com
bin
at
io
n,
a
lso
cal
le
d
"
Un
i
fied
P
ow
e
r
Q
ua
li
ty
Co
nd
it
io
ne
r"
(UPQC
),
r
esults
from
the
co
mb
i
natio
n
of
t
he
two
pa
rall
el
an
d
se
rial
act
ive
filt
ers.
Ta
king
a
dv
a
nta
ge
of
t
he
a
dv
a
ntag
es
of
the
t
wo
act
ive
filt
ers,
the
UPQC
pro
vid
es
a
si
nu
s
oi
dal
cu
rr
e
nt
an
d
vo
lt
ag
e
of
t
he
el
ec
tric
al
networ
k
from
a
dist
urbe
d
cu
rr
e
nt
and
vo
lt
age
of it
[7,
16
-
18]
.
The
do
c
um
e
nt
is
organ
iz
e
d
a
s
fo
ll
ows:
the
gen
e
ral
str
uctu
re
the
hybr
i
d
UPQC
in
sect
ion
2.
It
al
so
highli
gh
ts
the
re
qu
ir
ed
unit
s
su
c
h
t
he
i
de
ntific
at
ion
a
nd
re
gu
la
ti
on
m
et
hods
,
hy
br
i
d
UPQC
a
nd
c
on
t
ro
l
al
gorithms.
T
he
n
we
will
stu
dy
th
e
hybri
d
UPQC
filt
er,
by
simulat
in
g
th
e
c
ompensati
on
of
most
c
urr
ent
a
nd
vo
lt
age
dist
urban
ce
s
will
be
discu
ssed
in
sect
io
n
3.
Finall
y,
t
he
docu
ment
will
be
c
omplet
ed
by
the
con
cl
ud
i
ng r
e
mar
ks
.
2.
CONFIG
U
R
ATIO
N
O
F H
YBRID
UPQ
C
To
re
du
ce
the
siz
e
of
the
pa
r
al
le
l
act
ive
filt
er
a
nd
it
s
co
st,
the
UPQC
is
associat
ed
wit
h
a
pas
sive
filt
er
whose
r
ol
e
is
t
o
el
imi
na
te
the
s
pecific
fr
e
qu
e
ncies
en
abling
t
he
siz
ing
of
the
act
iv
e
filt
er
to
be
re
du
ce
d,
wh
ic
h
will
co
mp
e
ns
at
e
f
or
the
rest
of
th
e
disturba
nces
.
The
ge
ner
al
structu
re
of
t
he
U
PQ
C
H
ybri
d
is
com
posed
of
t
wo
pa
rts:
pa
ral
le
l
-
serial
act
ive
filt
ers
(
UPQ
C)
an
d
passi
ve
paral
le
l
filt
er
as
sho
wn
in
Figure
1
.
In
this
c
onfig
urat
ion,
t
he
r
ole
of
the
passive
filt
er
is
t
he
com
pensat
ion
of
the
pr
e
d
omi
nan
t
lo
w
fr
e
quenc
y
harmo
nic c
urre
nts (h
5
a
nd h7
)
emit
te
d by the
poll
uting l
oa
d [8].
Passive
filt
ers
are
the
sim
ples
t
and
m
os
t
ec
onomi
cal
al
ong
with
th
e
deme
r
it
s
of
la
rg
e
siz
e
an
d
t
un
i
ng
issues.
Hybr
i
d
filt
ers
pro
vid
e
op
ti
mal
so
l
utio
n
f
or
P
Q
mit
ig
at
ion
with
redu
ced
cost,
sim
pl
e
de
sig
n
a
nd
c
on
t
ro
l
with
high
reli
abili
ty for
PQ i
mpro
veme
nt. [
9]
Figure
1. Str
uc
ture of
the
hy
bri
d UP
QC
3.
CONTR
OL S
TRATEGIE
S
The
ap
plica
ti
on
of
the
S
ync
hro
nous
Re
fe
r
ence
Fr
a
me
(SFR
)
base
d
ha
r
monic
e
xtracti
on,
t
he
t
hr
ee
currents
Ia,
Ib
and
Ic
are
t
ransforme
d
f
r
om
t
he
th
ree
-
ph
a
se
ref
e
ren
ce
for
m
to
the
tw
o
-
phase
ds
an
d
qs
to
the
ref
e
ren
ce
curre
nts
,
.
[
]
=
√
2
3
[
1
−
1
2
1
2
0
√
2
2
−
√
2
2
]
[
]
(1)
The
cu
rr
e
nts
i
d
s
and
i
q
s
tra
ns
f
orme
d
t
o
a
s
ynch
r
onousl
y
ro
ta
ti
ng
f
rame
of
re
fere
nce
of
de
an
dqe
by
t
he
vecto
r un
it
cos
ω
e
an
d
sin
ω
e
,as s
how
n be
low:
[
]
=
[
cos
−
sin
sin
cos
]
[
]
(2)
Evaluation Warning : The document was created with Spire.PDF for Python.
ISSN
:
20
88
-
8
694
In
t J
P
ow
Ele
c
&
D
ri
S
ys
t,
V
ol
.
11
, N
o.
4
,
D
ecembe
r
2020
:
2126
–
2134
2128
The
f
reque
ncy
is
der
i
ve
d
fro
m
t
he
ha
rm
on
i
c
order
that
m
us
t
be
i
so
la
te
d.
It
is
i
mporta
nt
to
n
ote
that
the
directi
on
of
the
un
it
vecto
r
r
otati
on
m
us
t
be
in
ac
corda
nce
with
the
orde
r
of
t
he
ext
racted
harmo
nic.
Figure
2
s
hows
the tra
nsfo
rma
ti
on
of the a
bc t
o
the
ref
e
re
nc
e fr
a
me
of d
e
-
q
e
.
Figure
2
.
Tra
nsfo
rmati
on a
bc
t
o d
e
-
q
e
.
In
t
he
de
-
qer
e
f
er
ence
frame
t
he
ωe
c
omp
on
ents
ap
pea
r
as
qu
a
ntit
ie
s
of
C.C
an
d
al
l
ot
he
r
ha
rm
onic
s
are
t
ran
s
f
or
me
d
t
o
the
am
ounts
of
C.
A.
U
sing
a
lo
w
pa
ss
filt
er,
t
he
a
moun
t
of
C.C
can
be
accu
r
at
el
y
extracte
d. T
he c
urren
t C
.C co
mpon
e
nt is
no
w
r
et
ransf
orming bac
k
t
o usin
g
st
at
io
nary
refe
ren
ce
frame:
[
]
=
[
cos
sin
−
sin
cos
]
[
]
(3)
[
i
a
i
b
i
c
]
=
√
3
2
[
1
0
−
1
2
√
3
2
−
1
2
−
√
3
2
]
[
i
q
s
i
d
s
]
(4)
Since
a
q
ua
ntit
y
of
DC
i
n
the
de
-
qe
re
fer
e
nc
e
fr
ame
c
orres
ponds
ex
act
ly
to
the
ha
rm
onic
fr
e
qu
e
nc
y
of
inte
rest,
ext
racti
ng
t
he
am
ount
of
DC
us
ing
t
he
low
pas
s
filt
er
ens
ur
es
the
exact
synt
hesis
of
the
ha
rm
on
ic
current i
n
th
e r
efere
nce
fr
a
me
of a
bc,
Fig
ur
e
3
s
hows
th
e a
rrang
e
ment
of th
e filt
erin
g.
Figure
3
.
Tra
nsfo
rmati
on
of de
-
qe
to
a
bc
3.1.
V
olt
ag
e
c
on
t
rol
of DC
bus
The
a
ver
a
ge
volt
age
ac
ro
s
s
the
ca
pacit
or
m
us
t
be
mainta
i
ned
at
a
c
on
sta
nt
val
ue.
T
he
causes
of
it
s
var
ia
ti
on
a
re
mainly
the
l
osse
s
in
the
s
witc
he
s
(in
c
onduct
ion
a
nd
com
mu
ta
ti
on
),
i
n
the
dec
ouplin
g
inducta
nces
Lf
and
the
injec
ti
on
of
the
fun
da
mental
cu
rr
e
nt
s
durin
g
the
t
r
ansient
reg
ime
s
[10
-
13]
.
I
n
st
eady
sta
te
,
the
sou
rc
e
mu
st
pro
vid
e
act
ive
powe
r
equ
al
t
o
the
po
wer
dema
nded
by
the
loa
d.
Wh
e
n
a
n
a
ct
iv
e
powe
r
imbala
nce
occ
ur
s
in
the
s
ys
t
em,
t
he
ene
rgy
sto
rag
e
ca
paci
ty
m
us
t
pro
vi
de
the
po
wer
diff
e
ren
ce
betwe
en
t
he
netw
ork
a
nd
t
he
loa
d
[
14
-
16]
.
This
th
en
resu
lt
s
in
a
va
riat
ion
of
the
DC
volt
age
acro
s
s
the
ca
pa
ci
tor
su
ppl
ying
t
he
act
ive
filt
er,
w
her
e
r
e
gula
ti
on
is
necessa
r
y
i
n
orde
r
to
s
ta
bi
li
ze
the
volt
ag
e
acr
os
s
the
ca
pacit
or.
The
act
ive
po
wer
P
f
needed
to rest
ore the
ca
pacit
or volt
age
to
a c
onsta
nt
va
lue is
giv
e
n b
y
the
exp
ressio
n:
=
−
(
5)
Evaluation Warning : The document was created with Spire.PDF for Python.
In
t J
P
ow Elec
& Dri S
ys
t
IS
S
N: 20
88
-
8
694
Hyb
ri
d u
nifi
ed po
we
r
qu
alit
y conditi
on
e
r for
power
qualit
y
enha
ncem
e
nt
(
Djel
lou
li
D
j
ou
di)
2129
With:
P
f
:
instanta
ne
ous
powe
r
inje
ct
ed by t
he
act
i
ve
f
il
te
r.
P
L
: act
ive powe
r
c
on
s
um
e
d b
y
the
loa
d.
P
s
: act
ive po
w
er
delivere
d b
y t
he
s
ource.
L
o
a
d
S
u
p
p
ly
v
o
lt
a
g
e
Ps
(
t
)
PL
(
t
)
Pf
(
t
)
a
c
t
i
v
e
f
i
l
t
e
r
.
Figure
4
.
Exc
ha
ng
e
of
powe
r betwee
n
the
ne
twork
, th
e
loa
d an
d
the
f
il
te
r.
By
neg
le
ct
in
g
the
lo
sses
i
n
t
he
s
witc
h
es
a
nd
i
nducto
rs,
th
e
relat
io
ns
hi
p
betwee
n
t
he
a
ct
ive
po
wer
abs
orbed b
y
t
he
capacit
or a
nd the
vo
lt
ag
e acr
os
s it
is
giv
e
n by
:
=
(
1
2
2
)
(
6)
No
te
t
hat
the
r
el
at
ion
(
6)
is
nonlinea
r.
For
small
va
riat
io
ns
of
the
volt
age
a
rou
nd
it
s
ref
e
re
nce
é
, it can
be
li
nea
rized t
hroug
h
t
he follo
wing
re
la
ti
on
sh
i
ps
.
=
é
(
)
(7)
Apply t
he La
pl
ace t
ran
s
f
or
m:
(
)
=
(
−
é
)
(
)
(8)
Fr
om
the
relat
ion
(8),
a
nd
ta
ki
ng
int
o
acco
unt
the
pro
porti
on
al
c
on
t
ro
ll
er
,
the
DC
vo
lt
a
ge
co
ntr
ol
loop
can
be
re
pr
ese
nted
by
t
he
dia
gr
a
m
in
Figure
5.
T
he
cho
ic
e
of
t
he
par
a
mete
r
will
ai
m
to
obta
in
a
minimu
m
re
spon
s
e
ti
me
so
a
s
not
to
ha
rm
t
he
dy
namics
of
the
act
ive
filt
er
[
17].
In
ord
er
to
ob
ta
in
t
he
sign
al
é
one
has
t
he
c
hoic
e b
et
wee
n
a
prop
or
ti
onal
r
egu
la
to
r
a
nd a
pro
portion
al
i
nt
egr
al
r
e
gula
tor
.
Figure
5
.
DC
volt
age
regulat
ion l
oop
We
hav
e
the
tr
ansf
e
r funct
io
n o
f
the
close
d
l
oop:
Evaluation Warning : The document was created with Spire.PDF for Python.
ISSN
:
20
88
-
8
694
In
t J
P
ow
Ele
c
&
D
ri
S
ys
t,
V
ol
.
11
, N
o.
4
,
D
ecembe
r
2020
:
2126
–
2134
2130
2
é
2
=
+
2
2
+
2
+
2
(
9)
By arra
ng
i
ng them:
2
é
2
=
2
+
2
2
+
2
+
2
(
10)
So
:
2
=
2
=
√
1
2
(
11)
To ha
ve
a
good
dam
ping c
oe
ff
ic
ie
nt
of the c
losed
-
lo
op s
ys
t
em,
we have
c
ho
s
en
ε =
0.7
=
2
2
=
√
2
(
12)
3.2.
Seri
es c
onverter
contr
ol
Since
the
serie
s
filt
er
is
co
ns
i
der
e
d
to
be
a
com
pensat
ion
volt
age
ge
ne
rator,
the
loa
d
cu
rr
e
nt
causes
vo
lt
age
dro
ps
in
the
outp
ut
filt
er
and
t
herefo
re
a
la
rger
diff
e
re
nce
be
tween
the
set
po
i
nt
an
d
the
ou
t
pu
t
vo
lt
age
.T
o
co
mp
e
ns
at
e
f
or
the
er
r
or
pro
duced
by
t
he
LR
C
filt
er,
the
volt
age
l
oop
ca
n
be
cl
os
e
d
a
nd
base
d
o
n
the
filt
er
m
odel
,
de
velo
p
vo
lt
age
correct
or
s
[18,1
9].
S
o,
t
he
co
ntributi
on
will
be
el
imi
nated
durin
g
the
desig
natio
n
of the
P
I
co
ntr
oller o
f
t
he
volt
ag
e
c
on
tr
ol
lo
op, an
d
t
her
e
fore
the m
od
el
of
th
e
out
pu
t
filt
er
w
il
l
be
modifie
d
t
o
ha
ve
a
str
uctu
re
of
tw
o
nested
l
oops
,
one
inter
nal
cu
rr
e
nt
an
d
the
oth
e
r
exte
r
nal
volt
age
as
sh
ow
n
in
Fig
ure
6
[
20
-
22]
.
3.3. Shu
nt
c
onverter
contr
ol
The
r
eg
ulator
desig
n
is t
ypic
al
ly conn
ect
e
d t
o
the s
peed sp
eci
ficat
ion
r
e
quire
d
res
ponse
of
t
he
cl
os
e
d
loop
or,
al
s
o,
the
ma
xim
um
er
ror
t
o
fo
ll
ow
respec
ti
ng
the
ref
e
ren
c
e
s
ign
al
.
The
se
s
pecifica
ti
on
s
c
an
be
sp
eci
ficat
io
ns
of
the
band
width
an
d
phase
ma
rg
i
n
of
the
cl
os
e
d
lo
op.
So
,
it
is
neces
sary
to
determ
ine
t
he
par
a
mete
rs
Kp
an
d
Ki
t
o
gua
r
antee
these
nec
essit
ie
s.
To
qu
i
ckly
ha
ve
an
e
sti
mati
on
on
t
he
sought
value
s
,
we
su
pp
os
e
t
hat
w
e
can
a
ppr
ox
i
mate
t
he
tra
ns
f
er
f
unct
ion
to
t
he
c
uto
f
f
fr
e
qu
ency
ωCL
=
2π
fCL
to
t
he
f
ol
lowing
expressi
on [23
-
25]
.
S
hunt
filt
er c
on
tr
ol lo
op
is sh
own
i
n
Fi
gure
7.
Figure
6
.
T
w
o
-
loop c
on
t
ro
l sc
heme (i
nte
rn
al
current a
nd e
xt
ern
al
volt
age)
Figure
7
.
S
hunt
f
il
te
r
co
ntr
ol
loop
Evaluation Warning : The document was created with Spire.PDF for Python.
In
t J
P
ow Elec
& Dri S
ys
t
IS
S
N: 20
88
-
8
694
Hyb
ri
d u
nifi
ed po
we
r
qu
alit
y conditi
on
e
r for
power
qualit
y
enha
ncem
e
nt
(
Djel
lou
li
D
j
ou
di)
2131
4.
RESU
LT
S
AND DI
SCUS
S
ION
The
overal
l
modeli
ng
of
t
he
str
uctu
re,
al
lowed
stu
dy
ing
t
he
hybri
d
UPQC
f
or
the
ha
rm
onic
com
pensat
ion
and
t
he
r
edu
ct
io
n
of
the
pa
rall
el
act
ive
filt
er
siz
ing
t
hroug
h
sim
ulati
on
s
on
M
A
TLAB/
Sim
ulink
.T
wo
res
on
a
nt
passive
filt
ers
tu
ne
d
at
the
f
re
qu
e
nc
y
250
Hz
(
h5)
an
d
35
0Hz
(
h7)
resp
ect
ivel
y
ar
e
co
nnect
ed
in
paral
le
l
with
t
he
UPQC
l
oad
si
de.
The
pro
pose
d
hybri
d
UPQC
m
odel
i
s
simulat
ed
by
M
A
TLAB
/
Sim
ulink
Fig
ur
e
8.
The
s
ys
te
m
par
a
mete
rs
c
onside
red
for
this
stu
dy
a
re
giv
e
n
in Ta
ble 1.
Fig
ure
8
.
MA
T
LAB/
Simuli
nk
modell
ed syst
em
.
Table
1.
Sy
ste
m p
a
ramete
rs
Sy
stem
p
ara
m
ete
rs
v
alu
e
Po
wer
sy
stem
Grid v
o
ltag
e
Frequ
en
cy
Line im
p
ed
an
ce
No
n
lin
ear
lo
ad
300
50
0
,
01
+
10
−
6
Ω
R
a
=
4
0
_
;
L
a=
0
.
0
1
m
H
;
R
b
=
1
0
_
;
L
b
=
0
.
0
1
m
H
;
R
c
=
1
3
_
;
L
c=
0
.
0
1
m
H
;
UPQC
DC lin
k
v
o
ltag
e
DC lin
k
capacito
r
PW
M
switch
in
g
Co
n
n
ectio
n
f
ilter
o
f
sh
u
n
t f
ilter
KP
-
s
h
u
n
t
=
0
.
6
1
8
3
;
K
I
-
s
h
u
n
t
=
7
5
7
.
4
5
1
5
/
s
e
c
Co
n
n
ectio
n
f
ilter
o
f
series
f
ilte
r
(R
LC
)
KI
-
c
u
rr
e
n
t=
0
.
0
4
2
7
/
s
e
c
;K
P
-
c
u
r
n
t=
5
2
.4
7
0
1
KI
-
v
o
l
t
a
g
e=
1
.
9
9
5
0
1
0
3
/
s
e
c
;
K
P
-
v
o
l
t
a
g
e
=
0
.
5
6
9
0
735
.
6
0
.
0087
12
=
0
.
02Ω
,
=
2
.
2
=
0
,
002
Ω
,
=
0
.
148
,
=
52
.
675µ
Figure
9. Acti
ve
pow
e
r wit
ho
ut p
a
ssive
filt
er
Figure
10. Act
ive
powe
r wit
h passive
f
il
te
r
Evaluation Warning : The document was created with Spire.PDF for Python.
ISSN
:
20
88
-
8
694
In
t J
P
ow
Ele
c
&
D
ri
S
ys
t,
V
ol
.
11
, N
o.
4
,
D
ecembe
r
2020
:
2126
–
2134
2132
Figure
11.
Re
a
ct
ive pow
e
r wi
thout pa
ssive
fi
lt
er
Figure
1
2.
Rea
ct
ive pow
e
r wi
th p
a
ssive
filt
er
Figure
13.
Re
a
ct
ive pow
e
r (osc
) wit
hout
pas
sive f
il
te
r
Figure
14. Rea
ct
ive pow
e
r (osc
) wit
h passiv
e filt
er
Figure
15.
Acti
ve powe
r(osc)
without
passive
f
il
te
r
Figure
16. Act
ive
powe
r(osc)
with
passive
fil
te
r
Figure
17.
Re
a
ct
ive pow
e
r (c
on) wit
hout
pa
ssive
filt
er
Figure
18. Rea
ct
ive pow
e
r (c
on) wit
h passi
ve
f
il
te
r
Evaluation Warning : The document was created with Spire.PDF for Python.
In
t J
P
ow Elec
& Dri S
ys
t
IS
S
N: 20
88
-
8
694
Hyb
ri
d u
nifi
ed po
we
r
qu
alit
y conditi
on
e
r for
power
qualit
y
enha
ncem
e
nt
(
Djel
lou
li
D
j
ou
di)
2133
Figure
19.
Acti
ve powe
r
(c
on)
w
it
hout
passi
ve
f
il
te
r
Figure
20. Act
ive
powe
r(
c
on) wit
h passive
f
il
te
r
Figure
21. l
oad
volt
age
Figure
22. So
urce c
urren
t
with
filt
er p
assi
f
Figure
23. So
urce c
urren
t
without
passive
f
il
te
r
5.
CONCL
US
I
O
N
In
this
arti
cl
e
A
fter
validat
ing
the
pa
rall
el
an
d
serial
act
ive
filt
ers,
an
act
ive
pa
rall
el
-
seria
l
com
bin
at
io
n
a
nd
a
passi
ve
fil
t
er
(
UPQC
hybri
d)
we
re
stu
died
in
order
to
validat
e
the
si
mu
lt
ane
ous
operati
on
of
t
hese
t
hr
ee
f
il
te
rs.
This
c
ombinati
on
c
oul
d
ben
e
fit
f
rom
the
co
mm
on
operati
on
of
s
ome
el
ements
o
f
these
three
pa
rts
(th
e
volt
age
sou
r
ce
an
d
the
ca
pacit
or
rec
ha
r
ge).
T
he
str
uc
t
ur
e
c
hose
n
for
the
UPQC
hybri
d,
offer
i
ng
t
he
possibil
it
y,
via
the
pa
rall
el
act
ive
filt
er,
to
r
echar
ge
the
e
ne
rgy
sto
ra
ge
c
apacit
or
s
onli
ne
.
A
reducti
on
in
th
e
siz
e
of
t
hese
capa
ci
tors
has
been
ac
hieve
d
by
the
pas
sive
filt
er.
T
hus,
it
can
be
sai
d
t
ha
t
th
e
r
eso
na
nt
passi
ve
filt
er
(h5
+
h7)
f
ur
th
er
im
pro
ved
the
ope
rati
on
of
the
pa
rall
el
act
ive
filt
er
of
t
he
UPQC
a
nd
furthe
r
dec
reas
ed
it
s
ap
pa
ren
t
powe
r.
It
has
become
very
r
easo
nab
le
.
The
UPQC
H
ybri
d
perf
or
m
s
bette
r
tha
n
the
co
nventi
onal
UPQC
as
it
has
le
ss
a
pp
a
ren
t
powe
r
tha
n
the
U
PQ
C
Cl
assic
.
The
only
draw
bac
k
of
t
he
par
al
le
l
hybri
d
filt
er
is
the
risk
of
res
ona
nc
e
with
the
im
pe
dan
ce
of
the
netw
ork
but
th
e
us
e
of
a
lo
w
value
inducta
n
ce
bet
ween
the
res
onant
passi
ve
filt
er
an
d
the
U
PQ
C
reduces
t
his
ris
k.
The
UPQC
hy
br
i
d
pro
vid
es
sinu
s
oid
al
c
urr
ent
an
d
volt
ag
e
from
the
po
wer
gr
i
d
f
rom
a
disturbe
d
cu
r
ren
t
a
nd
volt
ag
e
there
of
.
Sizi
ng
has
decr
ease
d
a
nd
the cost
is re
du
ced.
ACKN
OWLE
DGE
MENT
S
The
aut
hors
a
re
t
hank
fu
l
to
the
Gen
e
ral
Directi
on
of
Scie
ntific
Re
s
earch
a
nd
Te
chnolo
gica
l
Dev
el
opment
, DGRS
DT
for
pro
vid
in
g
a
r
es
earch
grant.
0
0
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5
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Evaluation Warning : The document was created with Spire.PDF for Python.
ISSN
:
20
88
-
8
694
In
t J
P
ow
Ele
c
&
D
ri
S
ys
t,
V
ol
.
11
, N
o.
4
,
D
ecembe
r
2020
:
2126
–
2134
2134
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L
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V)
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al
i
ty
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ovem
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t",
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single
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ase
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ynam
i
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ta
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g
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lt
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on
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rnatio
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me
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ers
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PWM
Convert
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Gene
tic
Algorithms,”
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ernational
Journal
of
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iv
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ai
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phase
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wire
UP
QC
sys
te
m
b
ase
d
on
PA
C
base
d
SR
F
cont
roller
wi
th
r
ea
l
time
digital simul
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ti
on”
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rical
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e
r
Con
figura
t
ion
for
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R
Control
a
nd
Harm
onic Com
p
ensa
ti
on
,
”
IEEE T
rans
act
ions o
n
Industrial
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com
p
ensa
t
io
n,
”
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R
evi
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iv
e
Pow
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for
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-
Phase
GridConnec
t
ed
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ge
-
Sourc
e
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,”
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EE
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of
E
merging
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sign
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ro
l
of
LCL
filter
in
te
rfa
ce
d
gr
id
conn
ec
t
ed
sola
r
photovol
taic
(SP
V)
sys
te
m
using
power
balanc
e
t
he
ory,
”
El
e
ct
ric
al
Pow
er
and
E
nergy
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ss
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gn
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Perform
anc
e
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al
ysis
o
f
Thre
e
-
Phase
Solar
PV
Inte
gr
ated
UP
QC,”
IEEE
Tr
ansacti
ons on Indus
try
Applica
ti
ons
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vo
l. 54, no
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,
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018.
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D.
D,
S.
Buga
ta
and
K.
J,
“A
con
trol
strategy
on
power
qua
li
ty
i
mprove
m
ent
in
consume
r
side
u
sing
custo
m
po
wer
devi
c
e,”
Indon
esian
Journal
of
Elec
tri
cal
Engi
n
eer
ing
and
Compu
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r Sc
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nc
e
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no
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Evaluation Warning : The document was created with Spire.PDF for Python.