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I -1-60595-520-9
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21StateGirdHube iElectircPowerResearchInsttiute,P.R.China
2StateGirdHube iElectircPowerCompany,P.R.China
3WuhanUniverstiyofTechnology,Wuhan430063,P.R.China
4Hainakede(Hubei)TechnologyCo.Ltd,Wuhan430063,P.R.China
y e
K words:Substaiton,Ambien tnoise ,Prediciton,Groundabsorpitonfactor.
t c a r t s b
A . Inordert ocontrolt hesubstationnoisepollution .Accuratemeasuremen tofnoisemus tbe a , e r o f e r e h T . y c a r u c c a e h t t c e f f a l l i w s r e t e m a r a p y n a m , t n e m e r u s a e m e s i o n e h t n i t u B . t u o d e i r r a c s i h t n i d e t n e s e r p s i r o t c a f n o i t p r o s b a d n u o r g g n i t a l u c l a c r o f d o h t e
m paper .The rationaltiy of the d e r u s a e m d n a s i s y l a n a l a c i t e r o e h t y b d e i f i r e v s i d o h t e m d e s o p o r
p data ,andt heresutlsshowt hat:By r e p a p s i h t n i d e s o p o r p d o h t e m e h t g n i s
u ,thegroundabsorpitonfactori nt het arge tareacanbeeasily a l l a m s a y b d e n i a t b
o moun tofactua lmeasurementsi nt heearlystage.
n o it c u d o r t n I g n i k r o w t i e l i h w s t n e d i s e r g n i d n u o r r u s e h t o t e s i o n f o t o l a e t a i d a r l l i w n o i t a t s b u s e h
T ,whichhas
o y t il a u q e h t e v o r p m i o t r e d r o n I . s t n e d i s e r g n i d n u o r r u s e h t f o s e v i l e h t n o t c a p m i e v i t a g e n
a fl ifeof
e h t n e h w , r e v e w o H . d e l l o r t n o c e b t s u m n o i t a t s b u s f o e s i o n e h t , n o i t a t s b u s d n u o r a s t n e d i s e r e h t f o s s e n e v i t c e f f e e h t d n a , s t s o c e c n a n r e v o g r e h g i h o t d a e l l l i w l o r t n o c e s i o n , d e t e l p m o c s i n o i t a t s b u s t s e b e h t , e r o f e r e h T . ] 1 [ s u o i v b o t o n s i e c n a n r e v o
g governancei deai st opredictt henoiseofsubstaiton o t g n i d r o c c a n a l p t n e m t a e r t g n i d n o p s e r r o c e h t d r a w r o f t u p d n a , d e t e l p m o c s i n o i t a t s b u s e h t e r o f e b g n i d n u o r r u s f o e f i l f o y t i l a u q e h t e v o r p m i o t e c n a c i f i n g i s t a e r g f o s i s i h T . s t l u s e r n o i t c i d e r p e h t s e
r identsandreducet hecos tofsubstationnoisecontrol .
h c u s , s t l u s e r n o i t c i d e r p l a n i f e h t t c e f f a y l t c e r i d l l i w s r o t c a f y n a m , n o i t c i d e r p e s i o n f o s s e c o r p e h t n I n a m , n i a r r e t , e r u t a r e p m e t , y t i d i m u h r i a : s
a -madebarrier ,natura lbarrierandgroundfactor .Inordert o , s u h T . e u l a v r e t e m a r a p e l b a n o s a e r a n e v i g e b t s u m r o t c a f h c a e , y l e t a r u c c a a t a d n o it c i d e r p e h t n i a t b o .l e d o m n o i t c i d e r p e h t f o n o i t a l u c l a c e h t r e t f a d e n i a t b o e b n a c a t a d e t a r u c c a e h t y ll a r e n e g s i r o t c a f n o i t p r o s b a d n u o r g e h t f o n o i t a n i m r e t e d e h
T determinedbyt hereciproca loft he 3 1 6 9 O S I e h t n i n o i t a x a l e r d n u o r g f o e e r g e
d -2:1996standard .Thefifthreferenceisalsodetermined 3 1 6 9 O S I e h t f o s t n e m e r i u q e r e h t h t i w e c n a d r o c c a n
i -2:1996standard .Theadvantageoft hismethod n o i t p r o s b a e h t t a h t s
i factorcanbesimplydetermined ,butt heabsorptionfactoroft hegroundcanno t . y l e t a r u c c a d e r u s a e m e b d e s a b d e s o p o r p s i r o t c a f n o it p r o s b a d n u o r g g n i t a l u c l a c f o d o h t e m a , r e p a p s i h t n
I ont heISO9613
-d r a d n a t s 6 9 9 1 :
2 .Usingt hemeasureddatat ha tcomesfromt heGangDUsubstationi nWuhanctiyof i
e b u
H Provincet overifyt hecorrectnessoft het heoretica lalgorithm.
Acous itc sPrincipleo fNosiePrediciton n o it a g a p o r P e si o N f o s e l p i c n i r P c it s u o c A e h t f o l e d o m c i t s u o c a e h t , n o it a l u c l a c n o i t c i d e r p e h t n
I calculatedobjecti sequivalentt oapoin tsound s n o i t i d n o c e t a i r p o r p p a e h t o t g n i d r o c c a , e c r u o
s .And according to the ISO9613-2 standard ,the a c n o i t c i d e r p e h t r o f d e s u s i e c r u o s t n i o p e h t f o l e d o m n o i t a i d a r c i t s u o c
a lculation.
, d l e i f e e r f e h t n
I Octavebandsound powerleve lofthesoundsourceisse tupLw ,soundpressure
l e v e
l Ldtha tdmetersawayfromt hepoin tsourcecanbecalculatedbyt hefollowingformula :
in the formula: D isDirecitona lcorrection[dB] ;A is Octaveband attenuation of sound sourceto t
n i o p g n i v i e c e
r -
d n a b e v a t c o e h t f o n o it a u n e tt a e h
T offormula(1)consistsoft hefollowing
A =
A div+Aatm+Agr+Abar+Amisc . (2)
int heformula :AdivisAttenuationduet ogeometricdivergence;AatmisAttenuationduet oatmospheric
; n o i t p r o s b
a AgrisAttenuation due to ground effects; Aba risAttenuation of barrier effect; Amisc is
d e s u a c n o i t a u n e t t
A by othereffects, includingattenuation caused byleaves ,attenuaiton caused by s
e s u o h y b d e s u a c n o i t a u n e t t a d n a , s e t i s l a i r t s u d n
i .
s i n o i t a g a p o r p e c r u o s d n u o s t n i o p r o f a l u m r o f n o i t a u n e tt a e c n e g r e v i d c i r t e m o e g e h T
Adiv=[20lg(d/d0)+11] . (3)
: a l u m r o f e h t n
i d is Distance from sound source to receiving poin t[m]; d0is reference distance , d0=1[m].
s w o ll o f s a d e t a l u c l a c s i n o i t p r o s b a c i r e h p s o m t a y b d e s u a c a l u m r o f n o it a u n e tt a e h T
Aatm=αd/1000 . (4)
int heformula :αisAtmosphericattenuationcoefficient ;di sDistancefromsoundsourcet oreceiving t
n i o
p ,[m] .
t o t n i d e d i v i d e b n a c s t c e f f e r e i r r a b y b d e s u a c n o i t a u n e t t
A woparts ,oneisattenuaitonofacousitc y
r a d n u o b r e i r r a b r e p p u e h t s s o r c a n o i t a g a p o r
p ,theotheri sattenuationofacousitcpropagationacross .
y r a d n u o b r e i r r a b l a c i t r e v e h t
e t a l u c l a c e b n a c y r a d n u o b r e p p u e h t r e v o n o it a u n e tt a e h
T dbyt heformula
Abar=Ds-Agr >0 . (5)
a l u m r o f e h t y b d e t a l u c l a c e b n a c y r a d n u o b l a c i t r e v e h t r e v o n o it a u n e tt a e h T
Abar=Ds>0. (6)
a l u m r o f e h t n
i :DsisScreeningattenuationofperoctaveband ;AgrisGroundattenuaitonwhent he
.t s i x e t o n s e o d r e i r r a
b
n o it a u n e t t a e h
T Ag rcaused by ground effec tismainly caused bytheinterferenceofdirec tsound
d n a t n i o p g n i v i e c e r e h t o t e c r u o s d n u o s e h t m o r
f ground reflecitons .Thedownward curving route d n u o r g e h t d n a e c r u o s d n u o s e h t o t e s o l c d n u o r g e h t y b d e n i m r e t e d y l n i a m s i n o i t a u n e t t a t a h t s e r u s n e
e h t n e h w d e i l p p a e b y l n o n a c s t c e f f e d n u o r g g n i t a l u c l a c f o d o h t e m s i h T . t n i o p g n i v i e c e r e h t o t e s o l c
d n u o r
g isapproximatelyfla tandhorizonta lorconstan titlt .Thepropagaitonroutecanberepresented .
m a r g a i d c it a m e h c s g n i w o l l o f e h t y
b
0 3 hr 0
3 hs
r h s
h
n o i g e r e c r u o s c it s u o c a e h
T Themiddleerea Thereceivingregion
p d
e r u g i
F 1.Groundabsorptionattenuationofsoundpropagation.
y b d e s u a c a l u m r o f n o it a u n e tt a e h
T groundeffecti scalculatedasfollows
Agr=As+Ar+Am . (7)
a l u m r o f e h t n
e l b a
T 1.Calculationt ableofattenuationofgroundeffect. y
c n e u q e r f r e t n e c e h T
] z H
[ A
sorAr ] B d
[ A
m ] B d [ 3
6 -1 .5 -3q
5 2
1 -1.5+G�a’(h )
-3q�(1-G)
0 5
2 -1.5+G�b’(h ) 0
0
5 -1.5+G�c’(h ) 0
0 0
1 -1.5+G�d’(h ) 0
0 0
2 -1.5�(1-G)
0 0 0
4 -1.5�(1-G)
0 0 0
8 -1.5�(1-G)
: a l u m r o f e h t n
I
( )
( )
− ⋅
+
− ⋅
+ =
′ − − 2 − −0.092 −2.8⋅10−6⋅2
0 5 5
2 1 .
0 1 5.7 1
3 5 .
1 dp
p
e e
e e
h
a h
d h
( )
− ⋅
+ =
′ 1.5 8.6 −0.09h2 1 −dp50 e e
h
b
( )
− ⋅
+ =
′ 1.5 14 −0.46h2 1 −dp50
e e
h
c
( )
− ⋅
+ =
′ 1.5 5 −0.9h2 1 −dp50 e e
h d
p d n e h
W ≤30(hs+hr),q=0 ; whendp>30(hs+hr),q=1-30(hs+hr)/dp.
n o it a l u c l a
C Formulao fGroundAbsorp itonFactor e
n i b m o
C (2),(3),(4),(5),(6),(7)and(1)toget:
Ld=Lw+D-[20lg(d/d0)+11+αd/1000+Abar+Amisc]-[As+Ar+Am] . (8)
e k a
M L’andAs+Ar+Ama s:
L’=Lw+D-[20lg(d/d0)+11+αd/1000+Abar+Amisc] . (9)
A
[ s+Ar+Am]=-1.5+GsFs-1.5+GrFr-3q(1-Gm) . (10)
int heformula:F s,Frselectt hecorrespondingcalculaitonfactorsi nTable1a tdifferen tfrequencies.
h t o b , y c n e u q e r f d n a b e v a t c o d e n i m r e t e d e h t t
A Fs,Frandqaredeterminedforaspecificprediction
t e S . t n i o
p Fs=A,Fr=B,q=Cthenformula(10)canberepresentedas
A
[ s+Ar+Am]=-3+AGs+BGr-3C(1-Gm)=AGs+BGr+3CGm-3C-3 . (11)
e n i b m o
C (8),(9),(10),(11)toget:
G
A s+BGr+3CGm=L’-Ld+3C+3 .
(12)
s n w o n k n u e e r h t y l n o e r a e r e h
T G s,G r,Gm intheformula(12) .Therefore ,whent hemeasureddata
e b n a c e e r h t e h t f o s e u l a v c i f i c e p s e h t , h g u o n e s
i obtained.
l a u t c
A DataAnaly is so fSubsta iton MeasuredDa ta
e h t g n i k a
T GangDusubstationi nHube iprovinceWuhanctiyasanexample ,usingt heabovemethod e
t a l u c l a c o
e
r u g i
F .2 TopviewofSubstaiton. Figure .3 Schematicdiagramoft ransformerparameters.
s r e t e m a r a p e p a h s s t i d n a , e c r u o s e s i o n e h t s a r e m r o f s n a r t 1 . o N t c e l e s , s s e c o r p n o i t a l u c l a c s i h t n I e r
a shown in Figure 3 .When thefan isswitched on ,thesound powerleve lofNo.1 transformeris l
e v e l r e w o p d n u o s e h t , d e s o l c s i n a f e h t n e h W . ) A ( B d 9 . 5
9 ofNo.1t ransformeri s95.05dB(A). The noise components of the transformer are mainly the noise of 400Hz and 500Hz. T he
s i n a f e h t n e h w t u o d e i r r a c e r a s t n e m e r u s a e m t n a v e l e r e h t d n a t s e t n o i t a u n e t t a e s i o n r e m r o f s n a r t
n o d e n r u
t .Thel ocaitonofeachmeasuringpointi sasfollows:
e r u g i
F 4 .Schematicdiagramofl ayou tofmeasuringpoints.
e h
T distance between attenuaiton curve 7 and attenuaiton curve 8 ,attenuaiton curve 8 and .l
a u q e s i 9 e v r u c n o it a u n e t t
a Thent hedistancebetweent hemi s lilustratedbyFigure 2 ,whichi s6 .m s i 7 e v r u c n o i t a u n e tt a n o h c i h w m 5 2 d n a m 0 2 d n a n o i t a t s b u s r e m r o f s n a r t n e e w t e b e c n a t s i d e h T
. 9 e v r u c n o it a u n e t t a o t e m a S . m 1 7 . 5 2 d n a m 8 8 . 0
2 Thet es tdataareasfollows: .
2 e l b a
T Attenuationvaluesofeachmeasuringpoin twhenfani st urnedon. ]
m [ e c n a t s i D d e r u s a e M
] ) A ( B d [ a t a d n o i t a u n e t t A
e v r u c
1 2 3 5 1 0 1 5 2 0 2 5
7 e v r u c n o i t a u n e t t
A 63.3 63.4 63.2 60.9 61.9 59.3 5 8 60.1
8 e v r u c n o i t a u n e t t
A 7 2 68.7 66.2 63.5 65.4 6 0 5 8 59.1
e v r u c n o i t a u n e t t
A 9 66.3 65.9 63.3 65.5 6 1 59.9 58.3 56.9
c i r e h p s o m t a , n o it a u n e t t a e c n e g r e v i d c i r t e m o e g e h t , n o i t a t s e h t f o s s e c o r p t n e m e r u s a e m e h t n I
n o i t a g a p o r p e s i o n f o s s e c o r p e h t n i d e v l o v n i e r a n o it a u n e tt a t c e f f e d n u o r g d n a n o i t a u n e t t a n o i t p r o s b
a .
2 . 2 =
e c r u o
s . The premise of the sound source can be equivalen tto the poin tsound source is tha tthe m u m i x a m e h t s e m i t 2 s i t n i o p g n i v i e c e r e h t o t e c r u o s d n u o s t n i o p t n e l a v i u q e e h t m o r f e c n a t s i d
u o r g e h t n i s e c r u o s e h t n e e w t e b e c n a t s i
d p[4] .Themaximumdistancewithint hegroupbetweensound f
o s e c r u o
s theGangDut ransformerstationi s10.2m .Two itmest hedistancei s20.4meters .Therefore , .
e t a l u c l a c o t m 1 7 . 5 2 d n a , m 5 2 , m 8 8 . 0 2 , m 0 2 e h t n i a t a d t s e t g n i t s i x e e s u
d n a n o it a l u c l a
C Veriifca itono fGroundAbsorp itonFactor c
A cordingto thedatainTable2 ,removetheunreasonabletes tdataandthedataforcalculationas s
w o l l o f :
. 3 e l b a
T Measureddataforcalculation. ]
m [ e c n a t s i
D 2 0 20.88 2 5 25.71
] ) A ( B d [ e u l a v n o i t a u n e t t
A 5 8 58.3 59.1 56.9
t n e i c i f f e o c n o it a u n e t t a c i r e h p s o m t A ; z H 0 0 5 e u l a v y c n e u q e r f e s i o
N α=2.2;Theheigh toft hesource 5
. 1 s
i m.Att hispoin,tt herei sonlyonegroundregion ,namelyt hesourceregion ,betweent hesource o
s b a d n u o r g e n o y l n o , e r o f e r e h T . t n i o p g n i v i e c e r e h t d n
a rption factor needs to be calculated ; n
o i t c e r r o c l a n o i t c e r i
D D=0 .Therei snobarrierbetweent heNO.1t ransformerandt her eceivingpoint , f
o e u l a v e h t o
s Aba r,Amiscis0 .Accordingt ot heformula(12),t heresutlsareasfollows:
. 4 e l b a
T Calculationresultsofgroundabsorptionfactor. ]
m [ e c n a t s i
D 2 0 20.88 2 5
r o t c a f n o i t p r o s b a d n u o r
G 0.61 0.37 0.11
e g a r e v a r o t c a f n o i t p r o s b a d n u o r
G 0.36
1 7 . 5 2 t a n o i t a u n e t t a e h t y f i r e v o t d e s u s i 6 3 . 0 f o e g a r e v a n
A m .Take0.36i ntoformula(8)andt he n
o it a u n e t t
a valuei s57.1dB(A)a t25.71m .Comparedwitht hemeasuredvalue,t heerrori sonly0.2 B
d (A) .Therefore ,0.36canbeusedast hegroundabsorptionfactorvalueoft hestation.
n o is u l c n o C
n a c e
W drawt hefollowingconclusions: )
1 Amethodofcalculatinggroundabsorptionfactorbyusing measureddatamethod ispresented r
e p a p s i h t n
i .Verified by using themeasured dataof GangDu station ,proved tha tthemethod has .
y ti li b i s a e f l a c it c a r p d n a l a c it e r o e h t n i a t r e c
2)Using themethod mentioned in this paper ,theground absorp iton factorparametersoftarge t .
e g a t s y l r a e e h t n i s t n e m e r u s a e m l a u t c a f o t n u o m a l l a m s a y b d e n i a t b o e b n a c n o i g e r
e c n e r e f e R
a r e m r o f s n a r t r e t r e v n o c f o l e d o m n o i t c i d e r p e s i o n n o y d u t S , n a u y i h Z i L , n u y e u X n a u R ] 1
[ nd its
5 3 2 ) 1 1 0 2 ( 0 3 . s c it s u o c A d e i l p p A . J , n o i t a c i f i l p m i
s -240.
r o t i c a p a c f o n o i t c i d e r p e s i o n r o f m h t i r o g l a d n a l e d o m c i t s u o c A . l a t e , n a u y i h Z i L , g n e h z o a H i e W ] 2 [
e c n e i c S d e il p p A f o l a n r u o J . J n o i t a t s r e t r e v n o c n i r e w o
t .28(2010)152-157.
3 1 6 9 O S I ] 3
[ -2: 1996 ,Acoustics-Attenuation ofsound during propagation outdoors-Part2 Genera l )
6 9 9 1 ( , d n a l r e z t i w S , e v e n e G , n o i t a z i n a g r O s d r a d n a t S l a n o i t a n r e t n I . S n o i t a l u c l a c f o d o h t e m
s n o i s s i m s n a r t C D V H f o m e t s y s n o i t c i d e r p e s i o n e l b i d u a n o h c r a e s e R , g n e h z o a H i e W ] 4
[ ystem ,D .
) 0 1 0 2 ( . y g o l o n h c e T f o y ti s r e v i n U i e f e
