TELKOM
NIKA
, Vol. 11, No. 5, May 2013, pp. 2692 ~
2698
ISSN: 2302-4
046
2692
Re
cei
v
ed
Jan
uary 19, 201
3
;
Revi
sed Ma
rch 1
8
, 2013;
Acce
pted Ma
rch 2
5
, 2013
Simulation of Wear Particles on Electric-field Intensity
Distribution Around Conductors
Zhao Meiy
un
1,2
, Liu Zhen
g
lin
1
, Zhao Xinze*
2
, Zhan
g
Shaoqing
2
1
School of Em
erge An
d Po
w
e
r Engi
ne
erin
g, W
uhan Un
iver
sit
y
of T
e
chnol
og
y, W
uhan
43
006
3, Chi
na.
2
Colle
ge of Me
chan
ical a
nd M
a
teria
l
Engi
ne
e
r
ing,
T
h
ree Gorges Un
iversit
y
,
Yichan
g 44
30
02, Chi
n
a
*Corres
p
o
ndi
n
g
author, e-ma
i
l
: zhaome
i
yun
@
ctgu.ed
u.cn, xzzh
ao
@ctgu.
edu.cn
*
A
b
st
r
a
ct
Ta
kin
g
LGJ
150
/25 as the stud
y object, a fin
i
te ele
m
ent
si
mu
latio
n
mod
e
l of
space ar
ou
nd t
he w
i
r
e
w
i
th fretting w
ear particl
es w
a
s built, w
h
ich
w
a
s used to
study the i
n
flu
e
n
c
e of the si
z
e
,
the sha
pe a
nd
the
distrib
u
tion
of the fretting w
e
a
r
particles o
n
e
l
ectric-f
iel
d
inte
nsity distrib
u
tio
n
arou
nd trans
miss
ion w
i
res.
It
is of important
the t
heor
etical
signific
anc
e an
d app
licati
on pr
ospects
for this
w
o
rk to reduce the en
ergy l
o
ss
and th
e el
ectro
m
a
g
n
e
tic interf
erenc
e. T
he si
mu
lati
on res
u
lt
are as fol
l
ow
s: in the cas
e
of the sa
me l
o
a
d
i
n
g
voltag
e, w
hen
particl
es is hi
g
her tha
n
w
i
re max
i
mu
m
d
i
a
m
eter, the maxi
mu
m fi
eld
inten
s
ity aroun
d the
w
i
re
is shar
ply i
n
cr
ease
d
; Alo
ng
w
i
th increas
e
of the ra
di
us
o
f
curvature
of the partic
l
es, t
he
max
i
mu
m fi
el
d
intens
ity w
ill
b
e
re
duce
d
; Th
e d
egre
e
of irr
egu
larity
of p
a
r
ticles
distrib
u
ti
on
is l
a
rg
er, th
e
max
i
mu
m fi
e
l
d
intens
ity value
is bigg
er. Accordi
ng to the
relati
o
n
shi
p
b
e
tw
een the fie
l
d inte
nsity dis
t
ributio
n and t
h
e
coron
a
i
n
ce
pti
on v
o
lta
ge, it
can
be
conc
lu
ded
that w
i
th
the
incre
a
se
of
the
maxi
mum fiel
d i
n
tens
ity, th
e
coron
a
ince
pti
on volta
ge ca
n
be reduc
ed, s
o
coron
a
inc
e
p
t
ion volta
ge w
i
l
l
be dir
e
ctly affected by frettin
g
w
ear particles.
Ke
y
w
ords
:
F
r
etting w
ear, Emu
l
ati
on, coro
na inc
epti
on vo
ltage, coro
na i
n
cepti
on fie
l
d
Copy
right
©
2013 Un
ive
r
sita
s Ah
mad
Dah
l
an
. All rig
h
t
s r
ese
rved
.
1. Introduc
tion
With the dev
elopme
n
t of
the ele
c
trification of the rai
l
ways, the transmi
ssion
capa
city
and th
e tran
sport
dista
n
ce
grow ra
pidly
,
and th
e
el
e
c
tri
c
tra
n
smission
line
s
of large
capa
city,
long
dista
n
ce an
d hi
gh
voltage level
s
h
a
ve b
een
put into
op
eration
in
su
ccess.
With
the
increa
sing
of the conveyi
ng voltage th
e elect
r
ic
fiel
d intensity a
r
ound the
wire rises,
coro
na
discha
rge
is
gene
rated
while the val
u
e
of the el
ec
t
r
ic field i
n
ten
s
i
t
y reache
s to
the am
bient
air
brea
kd
own voltage. Co
ron
a
discha
rge
can pro
d
u
c
e
a
lot of adverse effects [1]. The facto
r
s t
hat
influen
ce
co
rona di
scha
rg
e of the
wire
have be
en
sy
stemati
c
ally rese
arche
d
by
many sch
o
la
rs,
the key poi
nt of their researche
s
wa
s co
ncentra
te
d on
the infl
uen
ce
of external
facto
r
s on
corona disch
a
rge,
a
nd wh
ich con
c
lud
e
d
that
the co
rona l
o
ss
co
uld be
red
u
ced by lesse
n
i
ng
surfa
c
e
rou
g
hne
ss of wi
re [3], [4]. But the rese
arch
about the influence of the wea
r
parti
cles
prod
uced by
wind lo
ad vi
bration i
n
st
rand
s, on
co
rona di
scha
rg
e of wire is l
i
ttle. A mass of
experim
ents
demon
strated
that, under t
he win
d
l
oad
vibration, ove
r
hea
d tran
smi
ssi
on cond
uct
o
r
abra
ded am
o
ng the inner
stran
d
s, an
d betwe
en the wi
re a
nd the wire h
o
lde
r
[5], [6]. The wear
particl
es i
n
th
e wire ove
r
flo
w
ed
out to th
e su
rfa
c
e a
n
d
attache
d
to the surfa
c
e,
which
affects t
h
e
surfa
c
e
ro
ug
hne
ss
of the
wire,
so it i
s
i
nevitable
to
a
ffects the fiel
d inten
s
ity di
stributio
n a
r
o
und
the wi
re [7]. Ansys, finite
element
simu
lation software wa
s a
pplie
d in this
pap
er to a
nalyze
the
influen
ce of
the size,
the sha
pe and
th
e
di
stributi
o
n
of the
we
ar
particl
es on
the field
inten
s
ity
distrib
u
tion. It ha
s p
r
a
c
tical
sig
n
ifica
n
ce
on a
nalyz
in
g
influen
ce of t
he
wea
r
of t
he
wire
on
th
e
corona di
sch
a
rge.
2. Conduc
to
r Coron
a
Dis
c
harge
Corona
disch
a
rge i
s
a
kin
d
of self
su
staining di
sch
a
rge
phe
nom
enon i
n
no
n-uniform
electri
c
field [
8
], [9].
It would pro
d
u
c
e a
great ma
ny
of energy lo
ss,
in addition to
that, it can also
prod
uce ele
c
troma
gneti
c
in
terfere
n
ce, audible n
o
ise and ha
rmful
chemi
c
al
s wh
ich would aff
e
ct
peopl
e’s no
rmal life. Many factors may
affect co
ro
n
a
discha
rge, in addition to the arra
nge
m
ent
of transmi
ssi
on co
ndu
ctor, the
height above the gro
und, the air
humidity and
the atmosph
e
re,
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046
TELKOM
NIKA
Vol. 11, No
. 5, May 2013 : 2692 – 269
8
2693
the su
rface condition of co
ndu
ctor itself woul
d also
affect it greatly. A large num
ber of sch
o
la
rs
have proved
that the ro
u
ghne
ss
of co
ndu
ctor
su
rfa
c
e
wa
s an i
m
porta
nt fact
or which affe
cts
con
d
u
c
tor corona di
scharg
e
[10], [11].
Und
e
r a cert
ain on-l
oad
voltage, eno
ugh ele
c
tri
c
field intensity
would be g
enerated
arou
nd the
wi
re, whi
c
h
wo
uld lead to el
ectro
n
avala
n
che by fre
e
e
l
ectro
n
s
aro
u
nd the wi
re a
n
d
then overall coron
a
di
scha
rge
woul
d be
prod
uced.
M
ean
while, the
bigge
st poi
nt of the ele
c
tri
c
field inten
s
ity in the cond
uctor surfa
c
e i
s
the sta
r
ting p
o
int of co
ro
na
discha
rge, th
e field inten
s
it
y
is the
coro
na
inception
fie
l
d inten
s
ity a
nd the
corre
s
po
ndin
g
volt
age i
s
th
e
coron
a
in
ce
ption
voltage.
FW Pe
ek wa
s the
first pe
rson
who
ded
uce
d
the
em
pirical fo
rmul
a of
co
rona
i
n
ce
ption
field intensity and voltage t
h
rou
gh expe
ri
mental data.
cm
kV
r
m
E
c
/
)
298
.
0
1
(
3
.
30
(1)
And in this formula, m---surface ro
ugh
ne
ss
coeffici
ent; r---wi
r
e radiu
s
;
δ
---relative den
sity of air
As formul
a (1) sho
w
ed,
start from th
e angle
of g
a
s di
scha
rge
and by the
o
retical
cal
c
ulatio
n, Han Sh
ao
we
i [12] et al got the
law th
at corona i
n
ception voltag
e ch
ang
ed with
mitotic co
unt, atmosp
heri
c
temperatu
r
e,
atmosp
here
and so
me o
t
her facto
r
s.
The calculating
result was i
n
accordan
ce
with the
empi
rical
form
ul
a
built by FW Peek,
whi
c
h te
stified the vali
dity
of the formula
.
From fo
rmula
(1), we kn
e
w
that co
ron
a
ince
ption field inten
s
ity wa
sn’t a con
s
tant. In
orde
r to m
a
ke co
ndu
cto
r
corona
di
sch
arge
be
self
-su
s
tainin
g, the field inten
s
i
t
y on the surf
ace
of wi
re
sh
oul
d be
big
en
o
ugh
and
the
spa
c
e
bei
ng
a certai
n di
st
ance a
w
ay f
r
om the
wi
re
also
need to be bi
g enou
gh. Th
e abra
s
ive pa
rticle
s attachi
ng to the su
rface of the wi
re leade
d to the
appe
ara
n
ce
of som
e
sp
ace
with a
sho
r
t lo
cal radiu
s
a
r
oun
d
the wi
re, which
mad
e
the
distrib
u
tion
of the field inte
nsity aroun
d
the wi
re
cha
nge g
r
e
a
tly. The di
strib
u
tions
of the fi
eld
intensity arou
nd the wi
re a
ffected the coron
a
inc
epti
on voltage of
the wire di
re
ctly. In order
to
maintain
cert
ain field inten
s
ity arou
nd th
e spa
c
e, the
wire
s
whi
c
h field inten
s
ity decrea
s
e
d
fa
ster
must be of stronge
r field intensity to
make the discha
rge self-su
s
tai
n
ing.
3. The Simulation An
aly
s
is of Wear
Debris to Spa
ce Field Inte
nsit
y
Distributions Arou
nd
the Wir
e
Wire L
G
J15
0
/25 wa
s taken a
s
the analysi
s
obj
ect in this pape
r, and the basi
c
para
m
eters o
f
the wire wa
s sho
w
n in Ta
ble 1.
Table 1. The
spe
c
ification
of LGJ1
50/25
(
GB1178
-8
3
)
Nominal cr
oss se
ction
(mm
2
)
Calculating section (mm
2
)
Number of single
w
i
re
Diameter of single
w
i
re (mm)
External
diameter
(mm)
Aluminum
stranded
conductor
Steel
cored
wi
r
e
Aluminum
stranded
conductor
Steel
cored
wi
r
e
Aluminum
stranded
conductor
Steel
cored
wi
r
e
Steel
strand
Steel
cored
wi
r
e
150 25
148.79
24.23
26
7
2.7
2.1
17.1
Assu
mption
s
have bee
n se
t about the wi
res d
e
scribe
d
in Table 1:
(1)
Assu
ming
tha
t
wire
s
we
re
i
n
infinite
sp
a
c
e, a
nd i
gno
ring the
influe
nce
of the
ea
rth an
d the
surro
undi
ng e
n
vironm
ent to the electri
c
field distri
butio
ns.
(2)
Assu
ming th
at the transmissi
on con
ducto
r wa
s
of indefinite length, the wire is a
n
equip
o
tential
body a
n
d
the
surfa
c
e
of th
e
wi
re
wa
s equ
ipotential. T
h
e voltage
d
r
o
p
ha
s be
en
ignored.
(3)
The influen
ce
of the air humidity and temperat
ure
we
re not take
n into con
s
id
era
t
ion, and the
air diele
c
tri
c
consta
nt is assumed a
s
006
.
1
.
Evaluation Warning : The document was created with Spire.PDF for Python.
TELKOM
NIKA
ISSN:
2302-4
046
Sim
u
lation of
Wea
r
Parti
c
le
s on Elect
r
ic-f
ield
Intensit
y Distri
bution A
r
oun
d … (Zh
ao Meiyun
)
2694
Acco
rdi
ng to
the above
assumptio
n
s,
the model
of the distri
b
u
tions of el
e
c
tri
c
field
arou
nd th
e
wire u
nde
r
ce
rtain voltage
coul
d be
si
m
p
lified into t
w
o-dim
e
n
s
iona
l static analy
s
is
model. Ta
kin
g
the
surfa
c
e
profile
of the wi
re
L
G
J1
50/25 a
s
the
basi
s
, the
a
nalysi
s
mod
e
l
of
smooth
wire
finite eleme
n
t co
uld
be
co
nstru
c
ted
a
s
sho
w
n
in fig
u
r
e
1[13]. If take th
e ai
r
area
arou
nd th
e
wire
with
the
radi
us D=0.
4m a
s
the
a
nalysi
s
a
r
ea
of ele
c
tric fie
l
d inten
s
ity, the
spe
c
ific m
o
d
e
l and me
shi
ng co
uld b
e
con
s
tru
c
t
ed
a
s
shown in figure
2. The
pape
r an
alyzed it
from th
ree
a
s
pect
s
of
ab
ra
sive p
a
rti
c
les,
i.e. t
he
si
ze,
the shap
e a
n
d the
dist
ribut
ions of a
b
rasi
ve
particl
es.
Figure 1.The
diagram of
the wire
su
rface
profile
Figure 2. The
meshin
g of wire m
odel
3.1. The Influence o
f
the
Size of Ab
ra
siv
e
Particles on the Fiel
d Intensity
Distribution
s
The
simulatio
n
mod
e
l set
con
e
shap
ed
abrasive
pa
rticles
as the
resea
r
ch obj
ect, an
d
abra
s
ive du
st
s we
re set among the wi
re stran
d
s o
n
the surfa
c
e.
On the ba
sis
of the same cone
diamete
r
d
,
six kin
d
s of th
e abrasive
particl
e
heights were set as
0.2mm
、、
、、
0.4m
m
0
.6mm
0
.
8mm
1
.0m
m
and 1.2m
m. The heig
h
t of the abra
s
ive du
sts
which
wa
s 0.8mm
among the
wire strand
s was in pa
ralle
l
with the ma
ximum extern
al diamete
r
. The
abra
s
ive
wire
model
with t
he hei
ght of
1.2mm i
s
sho
w
n in
figure 3
,
and the
on
-l
oad voltag
e
wa
s
35kV. Figu
re
2 is the sim
u
lation value
of the
maximum and mi
nimum field i
n
tensity of the air
arou
nd the
wire on the
co
ndition of six
kind
s of
ab
rasive pa
rticl
e
s and th
e sm
ooth co
ndu
ct
or
(0mm
).
Figure 3. The
diagra
m
of the size model
of abra
s
ive p
a
rticle
s
h
d
Evaluation Warning : The document was created with Spire.PDF for Python.
ISSN: 23
02-4
046
TELKOM
NIKA
Vol. 11, No
. 5, May 2013 : 2692 – 269
8
2695
Table 2. The
Influence of the Hei
ght of Abra
sive Part
icle
s on the
Maximum
and Minim
u
m
Field Intensit
y
The height of a
b
r
a
sive particles (
mm)
0
0.2
0.4
0.6
0.8
1.0
1.2
Min(V/m)
6745.3
6769
568.051
287.262
29.242
16.917
14.863
Max
(
1
0
5
V/m)
8.600
8.566
8.589
8.589
13.288
23.683
34.697
From tabl
e 2,
it could
be f
ound th
at different
h
e
ight
s of abra
s
ive
particl
es
affected the
electri
c
field
distrib
u
tions aroun
d the
wire
g
r
eatly
. When the
height of a
b
ra
sive pa
rticle
s
increa
sed fro
m
0mm to 1.2mm, the minimum
field intensity decreased from
6745.3 V/m to
14.863 V/m,
but the maxi
mum field int
ensity in
cre
a
s
ed from 8.6
×
10
5 V/m to 34.697
×1
05
V/m.
The h
e
ight 0.
8mm was the
inflection
poi
nt of ch
ang
e, whe
n
the
hei
ght wa
s
sho
r
t
e
r tha
n
0.8m
m,
i.e., shorte
r t
han the
maxi
mum external
diamete
r
, the maximum fi
eld inten
s
ity didn’t chan
ge
at
all whil
e the
minimum fi
eld inten
s
ity
decrea
s
e
s
ra
pidly with th
e incre
a
si
ng
of the ab
ra
sive
particl
e h
e
ig
ht. Whe
n
th
e hei
ght of
abra
s
ive
pa
rticle
s p
a
rall
el
s
with the
m
a
ximum exte
rnal
diamete
r
(the
height of ab
rasive p
a
rti
c
l
e
is
o.8mm
)
, the field intensity rises i
mmediately a
n
d
increa
sed
with the amplifying of the si
ze of abr
a
s
ive
particl
es
sha
r
ply. On the other h
and, the
minimum fiel
d inten
s
ity de
cre
a
sed im
m
ediately an
d
decrea
s
e
d
with the in
cre
a
sing of the
hei
ght
of abra
s
ive p
a
rticle
s.
From th
e re
lationship b
e
t
ween
co
ro
n
a
inception
field inten
s
ity and ele
c
tric field
distrib
u
tion
s
descri
bed
ab
ove, it can
be g
o
t
that unde
r
th
e same air co
n
d
ition,
with
t
he
increa
sing of
the maximu
m field inten
s
ity,
the coro
na inception
vo
ltage de
creased g
r
adu
ally
whe
n
the attenuatio
n gra
d
ient of the field inte
n
s
ity meets the
re
quire
ment
s. By compa
r
in
g the
data in table 2, there is no
obviou
s
influe
nce to
the co
rona inception
voltage from abra
s
ive du
st
s
whe
n
the
ab
rasive
du
sts h
e
ight
wa
s
sh
orter than
th
e maximu
m
external
diam
eter
of the
wi
re.
Whe
n
the a
b
r
asive
du
sts
height
wa
s lo
nger th
an
th
e maximum
external di
am
eter, the
coro
na
ince
ption voltage would d
e
c
re
ase shar
pl
y with the increa
sing of a
b
r
asive d
u
st h
e
ight. That is to
say, wire
s
would produ
ce
the
corona d
i
scharge ph
e
nomen
on wh
en it was in
a relative low on-
load voltage.
Therefore, in
orde
r to red
u
ce th
e influ
ence of ab
ra
sive pa
rticle
s height
s to th
e co
ron
a
discha
rge, we sho
u
ld try to avoid the existe
n
c
e of abra
s
ive du
st
s that were longe
r than the
maximum surface external
diamete
r
in a
c
tual run
n
ing of
the
wi
re.
A
l
so, we coul
d
clea
n
the
wi
re
surfa
c
e reg
u
l
a
rly
.
3.2. The Influence o
f
Curv
ature
Radiu
s
of Abra
siv
e
Particles to Field Intensi
t
y
Distribution
The shap
e of the re
sea
r
ch
obje
c
t abrasi
v
e particl
es h
a
s be
en a
s
su
med to be ov
al. Then
set the maj
o
r semi
-axis
a
be the
same
and the mi
no
r axis b
as
0.2 mm
、、
、
0.4 m
m
0.6 mm
0.8
mm
、
1.0 m
m
and
1.2
mm
re
sp
ectively. Lon
ge
r the
mi
nor
axis was, larg
er th
e top curvat
ure
radiu
s
of a
b
rasive p
a
rticl
e
s was. T
he
wire
mod
e
l was
sho
w
n
as figure
4: the
on-lo
ad volt
age
wa
s 3
5
kV, th
e calculating
simulatio
n
va
lue of th
e m
a
ximum an
d
minimum
field inten
s
ity of
the
air aroun
d the wire
wa
s sh
own in tabl
e 3.
Figure 4.The
diagram of the ov
al abra
s
i
v
e particle
s
model
a
b
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TELKOM
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ISSN:
2302-4
046
Sim
u
lation of
Wea
r
Parti
c
le
s on Elect
r
ic-f
ield
Intensit
y Distri
bution A
r
oun
d … (Zh
ao Meiyun
)
2696
Table 3. The i
n
fluen
ce of a
b
ra
sive pa
rticle sha
p
e
s
on
the maximum
and minimu
m field intensi
t
y value.
The length of mi
nor a
x
is
0.2
0.4
0.6
0.8
1.0
1.2
Min(V/m)
15.915
423.89
1798.1
6550.7
6490.6
6424.8
Max(V/m
)
3224700
2261200
1815700
1592000
1445300
1341200
Table 3
liste
d the maxim
u
m and
mini
mum field int
ensity of the
air a
r
ou
nd t
he wi
re,
whi
c
h contain
ed different t
op cu
rvat
ure radiu
s
of ab
rasive pa
rticle
s.
From the d
a
ta in the table it
coul
d be fou
nd that with the heig
h
teni
ng of the mi
nor axi
s
of oval abra
s
ive
particl
es, i.e,
the
increa
sing
of
the surfa
c
e
curvatur
e
radi
us
of ab
ra
siv
e
du
sts, th
e
maximum fiel
d inten
s
ity of
the
air a
r
ou
nd th
e wi
re d
e
cre
a
se
d gradu
all
y
, while the
minimum fiel
d inten
s
ity incre
a
sed g
r
a
d
ually.
The ch
angi
ng
gradie
n
t of the field intensit
y increa
se
d g
r
adu
ally.
Acco
rdi
ng to the previou
s
l
y
obtained re
lati
onship bet
wee
n
the ma
ximum field intensity
and th
e
co
ro
na in
ce
ption
voltage, an
d
by co
ntra
stin
g the
data
in
table
3 it
co
uld b
e
fo
und
that
the maximu
m field i
n
ten
s
ity around
t
he
wire
d
e
creased
gra
d
u
a
lly, while
th
e corona
in
ception
voltage incre
a
se
d gra
duall
y
with the increasi
ng of
the top curvatu
r
e
radiu
s
of ab
ra
sive du
sts.
Therefore, in
orde
r to in
cr
ease the
corona in
ce
ption
voltage
of th
e wire an
d d
e
crea
se
the coro
na l
o
ss of the
wi
re
, the wi
re
co
u
l
d be
optimi
z
ed fro
m
the
wea
r
m
e
chan
ism a
nd m
a
te
rial
asp
e
ct
s to avoid the app
ea
ran
c
e of sh
arp micro abr
asive wears in a
c
tual
op
eratio
n of the wire.
(a) Ab
ra
siv
e
particl
es
with 2 stran
d
s
as the interva
l
(b) Ab
ra
siv
e
particl
es
with 4 stran
d
s
as the interva
l
(c
) Abra
siv
e
particl
es
with 6 stran
d
s
as the interva
l
(d) Ab
ra
siv
e
particl
es
with 8 stran
d
s
as the interva
l
Figure 5.The
diagram of ab
rasive p
a
rti
c
l
e
distrib
u
tion
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ISSN: 23
02-4
046
TELKOM
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Vol. 11, No
. 5, May 2013 : 2692 – 269
8
2697
3.3. The Influence of Abrasi
v
e
Particle Di
stribu
tion
s on Field Intensi
t
y
Distributions
Abra
sive pa
rt
icle di
stri
bution referred t
o
the lo
ca
tio
n
of the a
b
ra
sive pa
rticl
e
s that attach
e
d
on
the su
rface o
f
the wire. T
hat wa
s the l
o
catio
n
in th
e stand
s of t
he su
rfa
c
e wire. It could
be
assume
d that there we
re two ab
ra
sive particl
es
in o
ne cross-sect
ion of the wire. For the steel
reinfo
rced al
uminum
con
ducto
r LG
J1
50/25, with
1
6
stra
nd
s al
uminum
wire
s in the o
u
tmost
layer, the
int
e
rval
gro
w
th
among
the
a
b
ra
sive
par
ti
cles i
s
2
stra
n
d
s. T
here
we
re
4 di
strib
u
tion
mode
s, i.e., 2, 4, 6 an
d
8 wi
re
stran
d
s
. T
he
on
-lo
ad voltage
was 3
5
kV
and
the calcul
ating
simulatio
n
val
ue of
the
max
i
mum a
n
d
mi
nimum fiel
d i
n
tensity of
th
e ai
r a
r
ou
nd
the
wire i
s
sho
w
n
in Table 4.
Table 4 liste
d
the maximum and minim
u
m field inten
s
ity of the air arou
nd the wi
re in the
above fou
r
ways of ab
ra
si
ve particl
e di
stributio
n.
From the data i
n
the table it
coul
d be fo
u
nd
that the minimum field intensity differs little in
different distrib
u
tion
model
s. The
numeri
c
al va
lue
of the maximum field inte
nsity is large
only whe
n
the sp
ace bet
wee
n
ab
ra
sive parti
cle
s
is 2
stran
d
s.
That
is to
say, la
rger th
e n
on-uniformit
y deg
r
e
e o
f
th
e ab
r
a
s
i
ve
pa
r
t
icle
is
, lar
g
e
r
th
e
maximum field intensity value is, and la
rger the
chan
g
i
ng gra
d
ient o
f
the field intensity is.
Acco
rdi
ng to the previou
s
l
y
obtained re
lati
onship bet
wee
n
the ma
ximum field intensity
and the
co
ro
na in
ception
voltage an
d b
y
contra
sting
the data in ta
ble 4 it can b
e
found th
at the
maximum field intensity around the wi
re increa
se
s
with the incre
a
sin
g
of the non-unifo
rmity o
f
the ab
ra
sive
dust
s
di
strib
u
t
ion in the
wi
re surfa
c
e. An
d then it
will
cau
s
e
a g
r
a
d
ual de
crea
se
o
f
corona in
ce
ption voltage of
the wire.
Therefore, in
orde
r to in
cr
ease the
corona in
ce
ption
voltage
of th
e wire an
d d
e
crea
se
the corona lo
ss of the wi
re
, the local co
nce
n
tration of
abra
s
ive du
sts sho
u
ld be
avoided.
Table 4.Th
e influen
ce of two differe
nt abra
s
ive pa
rticle distrib
u
tion
s on the maxi
mum and
minimum fiel
d intensity
Abr
a
sive par
ticle
distribution
Abr
a
sive par
ticles
w
i
th 2 str
ands as the
inter
v
al
Abr
a
sive par
ticles
w
i
th 4 str
ands as the
inter
v
al
Abr
a
sive par
ticles
w
i
th 6 str
ands as the
inter
v
al
Abr
a
sive par
ticles
w
i
th 8 str
ands as
the interval
Min(V/m)
6351.5
6535.9
6560.8
6542.4
Max(V/m
)
1520800
1486400
1487700
1487400
4. Conclusio
n
The
simul
a
tion a
nalysi
s
results sh
owed t
hat different si
zes,
shape
s and
l
o
catio
n
distrib
u
tion
s
of the mi
cro
wea
r
a
b
ra
siv
e
pa
rticle
s
g
r
eatly affected
the field i
n
te
nsity dist
ributi
on of
the spa
c
e a
r
o
und the wi
re. Furthe
rmo
r
e,
there a
r
e so
me rule
s a
s
follows:
1) T
h
e
existe
nce
of mi
cro
abra
s
ive
pa
rticle
s affe
cts the field
inten
s
ity dist
ributi
on of
the
sp
a
c
e
arou
nd the wi
re to som
e
de
gree.
2) The influ
e
n
ce of ab
ra
si
ve particl
es t
o
the fi
eld intensity of the spa
c
e a
r
ou
n
d
the wire isn’t
obviou
s
whe
n
the ab
ra
siv
e
pa
rticle
hei
ght is
sho
r
ter than the m
a
ximum extern
al diamete
r
o
f
the wire. On
the cont
rary
, when the
a
b
ra
sive
pa
rticle height i
s
l
onge
r than t
he maximum
external
dia
m
eter
of the
wire, the m
a
ximum field
inten
s
ity of the spa
c
e a
r
ound
the
wire
increa
se
s sh
arply an
d th
e co
ron
a
in
ception vo
ltag
e dro
p
s sharply with the
increa
sing
of
abra
s
ive
pa
rticle
heig
h
t. Ho
wever, th
e g
r
adient
of
the f
i
eld inte
nsity
alway
s
in
crea
se
s
with the
increa
sing of
abra
s
ive pa
rti
c
le hei
ghts.
3) With the i
n
crea
sing of
the top curvature ra
dius of abrasive
particl
es, the
maximum field
intensity aro
und the wi
re
decrea
s
e
s
grad
ua
lly. Mean
while, th
e co
rona in
ception voltag
e
rise
s, the min
i
mum field intensity increa
se
s
gra
dually
and the cha
nging g
r
adie
n
t
of
the field
intensity incre
a
se
s gradu
all
y
.
4)
With the i
n
crea
sing
of
the non
-unifo
rmity of
the a
b
ra
sive pa
rticle dist
ribution
,
the maximu
m
field inten
s
ity of the
spa
c
e a
r
oun
d th
e
wi
re i
n
crea
ses. M
ean
whil
e, the
co
ron
a
in
ceptio
n
voltage is lo
w and the ch
an
ging gradie
n
t of the field intensity increa
ses a
s
well.
Ackn
o
w
l
e
dg
ements
This work was finan
cially
suppo
rted b
y
the National Natural Scien
c
e Fo
un
dation of
Chin
a (G
rant
No. 510
752
3
5
) and Yi Ch
ang scie
nce rese
arch p
r
oje
c
t funding (A
2010
-30
2
-0
3).
Evaluation Warning : The document was created with Spire.PDF for Python.
TELKOM
NIKA
ISSN:
2302-4
046
Sim
u
lation of
Wea
r
Parti
c
le
s on Elect
r
ic-f
ield
Intensit
y Distri
bution A
r
oun
d … (Zh
ao Meiyun
)
2698
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