Tam sim no, cov firewalls ntawm transformers thiab reactors nyob rau hauv domestic UHV substations feem ntau txais cam khwb cia-nyob rau hauv-qhov chaw ua vaj tse pob zeb los yog framed cib-thiab-hmoov qauv, uas muaj tej yam suab rwb thaiv tsev. Txawm li cas los xij, vim muaj suab nrov tsawg zaus ntawm transformers thiab reactors thiab lub wavelength ntawm lub suab tsis ntev, lawv cov suab nrov diffraction thiab kis tau tus mob muaj zog heev, yog li lub suab rwb thaiv tsev thiab suab nrov txo cov teebmeem feem ntau tsis zoo. Tsis tas li ntawd, cov teeb meem suab nrov tam sim no thiab lub suab sib cais npog ntawm UHV substations tsis yog tsim tshwj xeeb rau cov yam ntxwv ntawm lub suab nrov tsawg ntawm lub substation, thiab cov suab nrov txo qis tsis zoo. Yog tias peb tuaj yeem xav txog cov yam ntxwv ntawm UHV substations dominated los ntawm nruab nrab- thiab tsawg-zaus suab nrov, thiab txais yuav ib tug sib xyaw suab-absorbing qauv uas muaj ob qho tib si ntsiag to thiab suab-absorbing functions, nws vam tias nws yuav ua tau zoo txo qhov nruab nrab zaus thiab tsawg-zaus suab nrov thiab muaj nplaim retardant thiab rwb thaiv tsev zog. Qhov no yog qhov tseem ceeb heev rau kev txhim kho qhov zoo ntawm ib puag ncig acoustic ntawm substations.
Raws li qhov no, tsab xov xwm no tshuaj xyuas qhov muaj zog ntawm lub suab nrov ntawm cov khoom siv tseem ceeb ntawm UHV substation. Vim yog qhov yuav tsum tau ua rau cov ntaub ntawv hauv chaw nres tsheb kom muaj cov khoom tiv thaiv hluav taws, rwb thaiv tsev thiab lwm yam khoom, peb tau xaiv los ua cov kev sim suab nrov ib zaug thiab ua ke ntawm cov qauv ua npuas ncauj melamine , cov qauv phaj micro-perforated, thiab cov qauv cement ua npuas ncauj, thiab tau tawm tswv yim txog cov qauv suab nrov sib xyaw uas tsim nyog rau kev txo suab nrov hauv UHV substations. Qhov no muaj qhov tseem ceeb ntawm kev coj ua rau kev siv engineering.
Ⅰ. Kev ntsuas suab nrov ntawm cov cuab yeej tseem ceeb ntawm UHV substation
Thaum lub sijhawm ua haujlwm ntawm UHV substations, lub suab nrov tseem ceeb suav nrog cov tshuab hluav taws xob siab, shunt reactors, substation structures, thiab lwm yam. Lub suab nrov transformer suav nrog lub suab nrov ntawm lub cev thiab lub tshuab cua txias, lub suab nrov shunt reactor yog suab nrov electromagnetic, thiab cov suab nrov ntawm lub substation yog corona suab nrov. Corona suab nrov yog feem ntau nruab nrab mus rau siab zaus, attenuates sai sai thaum nthuav tawm, thiab muaj qhov cuam tshuam me me. Lub suab nrov tsawg uas tsim los ntawm cov qauv sab hauv ntawm transformers thiab shunt reactors attenuates qeeb thiab muaj ntau yam kev cuam tshuam. Yog li ntawd, kev tswj suab nrov ntawm transformers thiab shunt reactors yog lub hom phiaj ntawm kev tswj suab nrov hauv substations.
- Main transformer suab ntsuas ntsuas
Lub suab zog theem ntawm lub transformer yog ntsuas siv lub suab siv txoj kev. Siv ib theem transformer raws li cov khoom ntsuas, qhov kev ncua deb ntawm cov kab contour thiab cov ntaub ntawv emission nto yog 2m, thiab ob txoj kab contour tau teem tseg, nyob rau ntawm lub dav hlau kab rov tav ntawm 2m thiab 4m feem. Tag nrho cov ntsiab lus ntsuas yog nyob rau ntawm cov kab contour uas tau teev tseg, thiab kab rov tav qhov deb ntawm cov ntsiab lus ntsuas uas nyob ib sab yog 1m. Lub suab siv tshuaj ntsuam xyuas yog siv los ntsuas qhov taw tes los ntawm taw tes.
Thaum lub hwj chim load ntawm ib pawg transformer yog 2000MW, lub suab siv ntsuas qhov tshwm sim ntawm theem C ntawm lub transformer nyob rau hauv pab pawg I. Lub A-weighted suab hwj chim theem yog qhov loj tshaj plaws nyob rau hauv lub 1/3 octave zaus band nrog rau nruab nrab zaus ntawm 100, 125, 160 thiab 200 Hz transformer ntawm UH. Raws li lub transformer suab nrov tsim mechanism, lub suab nrov nyob rau hauv no zaus band mas yog los ntawm electromagnetic nrov ntawm transformer lub cev. Yog li, thaum txo cov suab nrov ntawm lub tshuab hluav taws xob, qhov tseem ceeb yuav tsum tau muab los txo qis 100 ~ 200Hz zaus band. Thaum lub sij hawm ntsuas, lub hwj chim load ntawm ib pab pawg neeg ntawm transformers yog ruaj khov ntawm 2000MW, thiab cov coj tag nrho A-weighted suab hwj chim theem ntawm lub transformers yog 102.7dB (A).
- Kev ntsuas thiab ntsuas ntawm high-voltage reactor suab nrov
Txoj kev ntsuas ntawm reactor suab zog theem yog tib yam li ntawm transformer. Noj cov theem B ntawm qhov sib npaug ntawm cov reactor nyob rau hauv UHV substation raws li cov khoom ntsuas, qhov kev ncua deb ntawm cov kab contour thiab cov ntaub ntawv emission nto yog 1m, thiab ob txoj kab contour nrog qhov siab ntawm 1.5m thiab 3m yog teem raws li. Kab rov tav nrug ntawm qhov ntsuas cov ntsiab lus uas nyob ib sab yog 1m.
Kev tsom xam pom tau hais tias nyob rau hauv tag nrho 1/3 octave band, cov khoom siv tsawg zaus suav rau qhov loj dua, cov uas lub suab nrov ntawm 100Hz zaus yog qhov loj tshaj plaws, ncav cuag 96.4dB(A), uas yog 11.5dB(A) siab dua lub suab zog ntawm 200Hz. Lub zog suab nyob rau hauv 1/3 octave band qhov twg 100Hz nyob rau hauv account rau 91.2% ntawm ib theem siab anti-suab hwj chim. Yog li, nws tuaj yeem txiav txim siab tias qhov cuam tshuam tshwm sim hauv lub reactor suab thaj chaw faib tawm yog tshwm sim los ntawm 100Hz suab yoj.
Ⅱ. Cov ntaub ntawv ntxeem tau thiab micro-perforated phaj sim
Hauv kev tsim qauv tswj suab nrov, feem ntau nws nyuaj rau ua tiav qhov kev txo suab nrov uas xav tau los ntawm kev siv ib yam khoom siv rau kev nqus suab thiab kev kho rwb thaiv tsev. Yog li ntawd, cov qauv sib xyaw ua ke ntawm cov khoom siv nqus suab feem ntau siv los txo suab nrov. Tshwj xeeb tshaj yog nyob rau hauv cov chaw sab hauv tsev uas muaj ntim ntau dua thiab lub sijhawm reverberation ntev dua, daim ntawv thov yog qhov ntau heev. Txhawm rau kawm txog cov qauv nqus suab uas haum rau kev tswj suab nrov hauv UHV substations, peb yuav tsum xub xav txog cov khoom rwb thaiv tsev thiab cov khoom tiv thaiv hluav taws ntawm cov khoom siv, thiab qhov thib ob, peb yuav tsum ua ke cov kev ntsuas tshwj xeeb los txiav txim siab cov qauv nqus suab.
Tam sim no, perforated daim hlau thiab cov khoom siv suab nrov yog siv rau hauv lub suab rwb thaiv tsev ntawm UHV substations kom txo cov suab nrov, tab sis cov nyhuv tsis zoo nyob rau hauv qhov tsawg zaus band. Qhov no yuav tsum muaj kev sib txuas cov suab nrov ntawm cov cuab yeej tseem ceeb ntawm UHV substation. Tom qab txiav txim siab txog qhov tshwj xeeb txo cov suab nrov, yuav ua li cas xaiv cov khoom siv suab nrov nrov thiab yuav ua li cas los txiav txim siab lub suab-absorbing qauv ua tus yuam sij rau kev tswj suab nrov hauv substation. Hauv qab no, peb cov qauv ntawm micro-perforated phaj, melamine ua npuas ncauj, thiab foamed cement raug xaiv los ua ke nrog rau ib leeg los ua kev sim.
- Ob txheej txheej micro-perforated phaj ua ke
Micro-perforated phaj sim kuaj, uas tus nqi perforation ntawm micro-perforated phaj qauv 1 yog 1.5%, phaj thickness yog 1 hli, thiab lub pore txoj kab uas hla yog 0.7 hli; Lub perforation tus nqi ntawm micro-perforated phaj qauv 2 yog 1.1%, phaj thickness yog 1 hli, thiab lub pore txoj kab uas hla yog 0.7 hli, Micro-perforated phaj qauv 3, tus perforation tus nqi yog 0.7%, phaj thickness yog 1 hli, thiab lub qhov taub yog 0.7 hli.
Ob txheej ntawm kev sim tau ua tiav ntawm ob txheej txheej micro-perforated phaj ua ke. Kev sim 1 yog kev sib xyaw ua ke ntawm micro-perforated phaj qauv 2 thiab micro-perforated phaj qauv 1, thiab kev sim 2 yog kev sib xyaw ntawm micro-perforated phaj qauv 1 thiab micro-perforated phaj qauv 3. Ob txheej ntawm kev sim ntawm ob txheej micro-perforated phaj ua ke ua ke qhia tau hais tias lub suab nqus coefficient ntawm 100 Hz, qhov siab tshaj plaws ntawm lub suab nrov ntawm 0.7 Hz. 500Hz txog 600Hz hauv ob qhov kev sim. Nyob rau hauv lub zaus band saum 600Hz, lub suab nqus coefficient maj mam txo.
- Kev sib xyaw ntawm foamed cement thiab micro-perforated board
Ua ntej, lub suab-absorbing qauv ua ke nrog foamed cement thiab ib txheej micro-perforated phaj tau siv. Ob qhov kev sim nrog qhov sib txawv tau ua tiav los ntawm kev sib txuas cov cemented foamed thiab ib txheej micro-perforated phaj. Hauv ob qho kev sim, cov cement foamed tau muab tso rau pem hauv ntej ntawm lub phaj micro-perforated.
Yuav luag tsis muaj kev hloov pauv loj ntawm cov ntaub ntawv ntawm Kev sim 3 thiab Kev sim 4. Lub suab nqus kev ua haujlwm ntawm cov qauv sib xyaw ua ke tsis hloov nrog me ntsis kev hloov pauv ntawm cov tuab ntawm foamed cement thiab qhov kev ncua deb ntawm foamed cement thiab micro-perforated phaj. Ntawm 100Hz, lub suab nqus coefficient yog nyob ib ncig ntawm 0.4, ntawm 250Hz, lub suab nqus coefficient nce mus txog qhov siab tshaj plaws, thiab nyob ib ncig ntawm 900Hz, nws nce mus txog qhov siab tshaj plaws ntawm lub suab nqus coefficient dua.
- Melamine ua npuas ncauj thiab micro-perforated vaj huam sib luag ua ke
Ob qhov kev sim tau ua los ntawm kev sib xyaw ntawm melamine ua npuas ncauj thiab ib txheej micro-perforated daim hlau. Hauv ob qho kev sim, melamine ua npuas ncauj tau muab tso ua ntej cov phaj micro-perforated. Lub suab nqus coefficients ntawm 100Hz nyob rau hauv ob pawg ntawm kev sim yog nyob ib ncig ntawm 0.7, thiab ntawm 100Hz thiab 500Hz, lub suab nqus coefficients yog tag nrho saum toj no 0.7. Nyob ib ncig ntawm 500Hz, lub suab nqus coefficient txo qis, tab sis raws li qhov zaus nce, lub suab nqus coefficient maj mam nce. Qhov kev sib xyaw ua ke no muaj qhov zoo tshaj plaws lub suab nqus cov nyhuv hauv ob qho tib si tsawg zaus thiab high-frequency bands.
Ⅲ. Kev soj ntsuam ntawm kev sim cov txiaj ntsig
Raws li cov yam ntxwv ntawm lub suab nrov ntawm cov cuab yeej tseem ceeb ntawm UHV substation uas yog qhov tseem ceeb hauv qhov tsawg zaus band, kev sim tau ua los ntawm kev xaiv lub micro-perforated phaj composite qauv, foamed cement plus micro-perforated phaj composite qauv, thiab melamine ua npuas ncauj ntxiv rau micro-perforated phaj composite qauv. Cov txiaj ntsig kev sim qhia tau hais tias tag nrho peb txoj kev sib xyaw ua ke tuaj yeem ua tiav cov txiaj ntsig zoo ntawm lub suab nrov hauv qhov tsawg zaus, tab sis yuav ua li cas siv nws hauv kev tsim vaj tsev tiag tiag yuav tsum muaj kev ntsuas suab nrov.
- Micro-perforated phaj ua ke qauv
Ob-txheej micro-perforated boards tuaj yeem nthuav dav lub suab nqus zaus band ntawm ib txheej micro-perforated boards. Raws li lub hauv paus ntsiab lus ntawm kev sib txuam impedance, lub hauv paus ntsiab lus ntawm kev tsim ua ke yog tias qhov perforation tus nqi ntawm lub hauv ntej txheej ntawm micro-perforated boards yog ntau dua li perforation tus nqi ntawm sab nraub qaum ntawm cov laug cam. Kev sib xyaw tsim ntawm micro-perforated panels tuaj yeem ua tiav lub suab nqus coefficient ntawm ntau dua 0.7 hauv qhov ntau zaus ntawm 150-800Hz thaum lub thickness ntawm tag nrho cov qauv ua ke yog 20cm. Thaum lub thickness ntawm tag nrho cov qauv ua ke yog 30cm, nws muaj peev xwm ua tiav lub suab nqus coefficient ntawm ntau tshaj 0.7 nyob rau hauv ntau zaus ntawm 100-800Hz.
- Foamed cement ntxiv rau micro-perforated phaj composite qauv
Ntxiv foaming cement nyob rau hauv pem hauv ntej ntawm lub micro-perforated board yuav broaden lub suab nqus zaus band ntawm lub micro-perforated board, thiab cov foamed cement kuj ua lub luag hauj lwm fireproof.
Foamed MAAs ntxiv rau ib txheej micro-perforated board tuaj yeem ua tiav lub suab nqus coefficient ntawm ntau tshaj 0.7 nyob rau hauv ntau zaus ntawm 150-1000Hz thaum lub thickness ntawm tag nrho cov qauv ua ke yog 20cm. Foamed MAAs ntxiv rau ob txheej txheej micro-perforated panels tuaj yeem ua tiav lub suab nqus coefficient ntawm ntau dua 0.7 hauv qhov ntau zaus ntawm 150-1400Hz thaum lub thickness ntawm tag nrho cov qauv ua ke yog 20cm. Thaum lub thickness ntawm tag nrho cov qauv ua ke yog 30cm, nws muaj peev xwm ua tiav lub suab nqus coefficient ntawm ntau tshaj 0.7 nyob rau hauv ntau zaus ntawm 100-1400Hz. Nyob rau tib lub sijhawm, cov me dua cov tuab ntom ntom ntawm cov cement, qhov ntau dua qhov porosity, thiab qhov zoo dua cov txiaj ntsig tsawg zaus lub suab tsis haum.
- Rau cov qauv ua ke ntawm suab-absorbing khoom thiab micro-perforated phaj, cov khoom siv suab nrov tuaj yeem nthuav dav lub suab-absorbing zaus band ntawm micro-perforated phaj thiab nce qhov kev ncua deb ntawm lub suab-absorbing thiab micro-perforated phaj. Lub suab nqus coefficient ntawm nruab nrab thiab siab frequencies nce, thiab lub suab nqus lub ncov txav mus rau qhov tsawg zaus. Los ntawm kev ua kom lub thickness ntawm lub suab-absorbing khoom, lub low-frequency suab absorption coefficient txo me ntsis, thiab lub nruab nrab- thiab high-frequency suab absorption coefficient nce. Ua kom lub thickness ntawm cov kab noj hniav tom qab lub micro-perforated phaj tuaj yeem ua rau kom muaj suab nrov tsawg. Cov ntaub ntawv suab nrov ntxiv rau ob txheej micro-perforated panels muaj lub suab zoo dua thiab dav dua suab-absorbing zaus bands dua li suab-nqus cov ntaub ntawv ntxiv rau ib txheej micro-perforated panels.
Nws tuaj yeem pom los ntawm kev txheeb xyuas cov ntaub ntawv sim uas melamine ua npuas ncauj ntxiv rau ib txheej micro-perforated phaj tuaj yeem ua tiav lub suab nqus coefficient ntawm ntau dua 0.6 hauv qhov ntau zaus ntawm 200-1600Hz thaum lub thickness ntawm tag nrho cov qauv ua ke yog 20cm. Thaum lub thickness ntawm tag nrho cov qauv ua ke yog 30cm, lub suab nqus coefficient ntawm ntau tshaj 0.6 tuaj yeem ua tiav nyob rau hauv ntau zaus ntawm 100-1600Hz. Melamine ua npuas ncauj ntxiv rau ob txheej txheej micro-perforated panels tuaj yeem ua tiav lub suab nqus coefficient ntawm ntau dua 0.7 hauv qhov ntau zaus ntawm 200-1600Hz thaum lub thickness ntawm tag nrho cov qauv ua ke yog 20cm. Thaum lub thickness ntawm tag nrho cov qauv ua ke yog 30cm, lub suab nqus coefficient ntawm ntau tshaj 0.7 tuaj yeem ua tiav hauv qhov ntau zaus ntawm 100-1600Hz.
Raws li kev soj ntsuam ntawm lub suab nrov zaus tus yam ntxwv ntawm UHV lub ntsiab transformer thiab high-voltage shunt reactor, lub suab nrov lub zog ntawm UHV lub ntsiab transformer yog mas concentrated ntawm 100-200Hz, thiab lub suab nrov ntawm lub high-voltage reactor yog mas concentrated ntawm 100Hz. Txhawm rau xaiv cov khoom siv suab nrov, nws yog ib qho tsim nyog los ua ke cov zaus ntawm ob lub suab nrov nrov. Nyob rau tib lub sijhawm, txoj kev txo cov suab nrov kuj yuav tsum tau ua ke nrog kev teeb tsa ntawm qhov chaw ntawm lub substation los tswj cov suab nrov nrog kev pom zoo ntawm cov khoom siv thiab cov txheej txheem.
Yog xav paub ntxiv txog SINOYQX Melamine Foam, thov hu rau peb ntawm [email protected] lossis hu rau peb: + 86-28-8411-1861.
Qee cov duab thiab cov ntawv luam tawm los ntawm Is Taws Nem, thiab cov ntawv pov thawj yog los ntawm tus sau thawj. Yog tias muaj kev ua txhaum cai, thov hu rau peb kom tshem tawm.