ISSN: 1693-6
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Param
e
ter O
p
tim
i
zation of Pitch Control
l
er
for Robu
st
…… (Cu
k
Supriyadi Ali Na
ndar)
PARAM
ETER OPTIMIZATION OF PITCH CONTROLLER
FOR ROBUST FREQUENCY CONTROL IN AN
ISOLATED WIND-DIESEL HYBRID POWER SYSTEM
USING GENETI
C ALGORITHM
Cuk Supriy
adi Ali Nanda
r
Badan Pengkajian dan Penerapan Teknologi (BPPT)
J
l
.MH Thamrin No.8 Jakart
a Pus
a
t
e-mail: cuk_supriyadi
@we
b
mail.bppt.go
.
id
Abs
t
rak
Paper ini fo
kus
pad
a o
p
tim
a
si pa
ram
e
ter
peng
end
ali
pitch
yang
robu
st untu
k
m
e
redam
fluktua
s
i frekuen
si pada
sistem
tenaga
listrik h
y
br
i
d
angin-die
s
el
di daerah te
rpen
cil. Struktur
peng
endali
yang dip
a
kai a
dalah
ken
dali
sede
rh
ana le
ad-la
g orde 1
.
Untuk m
e
ja
m
i
n kehan
dal
an
peng
endali,
norm
a
lize
d
coprim
e
factori
z
ati
on dig
una
kan untu
k
m
e
represe
n
tasi
kan
ketida
kp
astia
n
si
stem
, sep
e
rti pe
ru
bah
a
n
pa
ram
e
ter sistem
da
n
la
in-lain, pad
a saat pem
odel
an
sistem
. Para
m
e
ter penge
ndali ya
ng o
p
tim
a
l dapat dihasil
kan d
enga
n m
engguna
ka
n kon
d
isi
unjuk kerj
a
dan kondisi st
abilitas
kendali
H
∞
loo
p
sha
p
ing
untu
k
m
enform
u
l
a
si
kan
m
a
sal
ah
optim
asi, dan
algoritm
a
ge
netika
digun
a
k
an
untu
k
m
enyele
s
ai
kan
m
a
salah o
p
tim
a
si tersebu
t.
Studi sim
u
la
si di
gun
akan
untu
k
m
e
m
perlih
at
ka
n
p
e
rba
ndin
gan
unju
k
ke
rja dan ke
han
da
lan
peng
endali pi
tch antara pe
ngen
dali ya
n
g
diusulka
n deng
an pen
g
endali
vari
ab
el stru
ktur
ya
ng
diperoleh d
a
ri
paper lai
n
n
y
a.
Kata kunci
:
siste
m
ten
aga
listrik
h
y
br
id a
ngin
-
diesel
, kenda
li fre
k
ue
nsi rob
u
st,
a
l
gorit
ma
ge
net
ika
A
b
st
r
a
ct
This
pap
er focu
se
s
on t
he p
a
ram
e
te
r optim
izat
io
n of the
pitch controll
er for
rob
u
st
freque
ncy co
ntrol in an isolated wi
nd-d
i
esel h
y
b
r
id
power syste
m
.
The structure of the pi
tch
controlle
r is
a pra
c
tical 1
s
t–orde
r lea
d
-
lag
com
pen
sator. In
syst
em
m
odeling, the norm
a
li
zed
cop
r
im
e facto
r
izatio
n i
s
ap
plied to
repre
s
ent
syst
em
uncertaintie
s
su
ch as vari
a
t
ions of system
param
eters
etc. As a re
sult, the ro
b
u
st st
a
b
ility
of the cont
rolled system
again
s
t va
ri
ous
uncertaintie
s
ca
n b
e
g
u
a
r
antee
d. To
obtain
th
e controlle
r para
m
eters,
the perfo
rm
ance
and
stability conditions of H
∞
loop sha
p
in
g control are
em
ployed to form
ulate the optim
ization
probl
em
. The
gen
etic
algo
rithm
is u
s
e
d
to
sol
v
e th
e
probl
em
. The
freq
uen
cy
control
effect
and
robu
stne
ss o
f
the p
r
opo
sed pit
c
h
co
n
t
roller ag
ain
s
t system
un
certai
nties a
r
e e
v
alu
a
ted
by
sim
u
lation stu
d
ies in
com
parison with a
vari
able stru
cture
pitch con
t
roller.
Key
w
ords
:
wind-di
esel hybrid po
we
r system
,
r
obust frequ
en
cy
con
t
rol, genetic a
l
gorithm
1. INTRODUCTION
Wind p
o
wer
is expe
cted to be econo
mically attra
c
tive when th
e wind
spe
e
d
of the
prop
osed
site
is con
s
ide
r
a
b
le for el
ect
r
i
c
al g
ene
ratio
n
and
elect
r
ic energy is n
o
t easily availa
ble
from the
gri
d
[1]. This
situation i
s
usu
a
lly
foun
d on i
s
la
nd
s a
nd in
re
mote lo
caliti
e
s.
Neverth
e
le
ss,
wind
po
we
r
is
inte
rmitte
nt
due
to worst ca
se we
ather co
nditi
ons su
ch
a
s
an
extended
pe
ri
od of ove
r
cast ski
es
or
wh
en the
r
e i
s
n
o
win
d
for se
veral
wee
k
s. As a
re
sult, wind
power
gene
ration is varia
b
le an
d un
predicta
b
le.
To
solve thi
s
p
r
oblem, the
h
y
brid
wind
po
wer
with die
s
el ge
neratio
n ha
s been
sug
g
e
s
ted [2, 3].
A hybrid wind
diesel sy
ste
m
is very reliable
be
cau
s
e
the diesel acts as a cu
shio
n to take
care of va
riat
ion in
win
d
speed
and
wo
uld al
ways m
a
intain a
n
av
erag
e p
o
wer
equal to
the
set
point. Ho
wev
e
r, in additio
n
to the unst
eady natu
r
e
of wind, an
other
seri
ou
s p
r
oble
m
face
d
by
the
isol
ated power gen
eration
is
the freque
nt ch
an
ge in l
oad
de
mand
s. Thi
s
may ca
use la
rge
and
severe o
scill
ation of system freq
ue
ncy. In t
he worst
ca
se, th
e system
ma
y lose
stability if
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