Pakali pano, zoyatsira moto za thiransifoma ndi ma reactors m'malo ocheperako a UHV nthawi zambiri amatenga zomangira za konkriti kapena zomangira njerwa ndi ufa, zomwe zimakhala ndi zotsekemera zina. Komabe, chifukwa cha kutsika kwaphokoso pafupipafupi kwa ma transfoma ndi ma reactors komanso kutalika kwa mafunde a phokoso, kutulutsa kwawo kwaphokoso ndi kuthekera kopatsirana kumakhala kolimba kwambiri, kotero kuti kutsekemera kwa mawu ndi zotsatira zochepetsera phokoso nthawi zambiri kumakhala kosauka. Kuphatikiza apo, zotchinga zaposachedwa zamawu ndi zotchingira zodzipatula zamtundu wa UHV sizinapangidwe mwapadera mawonekedwe aphokoso apansi panthaka, ndipo zotsatira zochepetsera phokoso sizoyenera. Ngati titha kulingalira za mawonekedwe a malo ochepera a UHV omwe amayendetsedwa ndi phokoso lapakati komanso lotsika, ndikutengera kapangidwe kamene kamakomera mawu komwe kamakhala ndi ntchito zotsekereza komanso zotulutsa mawu, tikuyembekeza kuti zitha kuchepetsa phokoso lapakati komanso lotsika komanso kukhala ndi zinthu zoletsa moto komanso zotsekereza. Izi ndizofunika kwambiri pakuwongolera mawonekedwe amtundu wamayimbidwe wamakanema.
Kutengera izi, nkhaniyi ikuwunika momwe magwero a phokoso amakhudzira mphamvu ya zida zazikulu za UHV substation. Poganizira zofunikira kuti zipangizo zomwe zili mu siteshoni zikhale ndi zoletsa moto, zotetezera kutentha ndi zina, tinasankha kuchita zoyeserera zoyamwa mawu kamodzi kapena kawiri pa zitsanzo za thovu la melamine , zitsanzo za mbale zobowoka pang'ono, ndi zitsanzo za simenti yopangidwa ndi thovu, ndipo tinapereka lingaliro la kapangidwe kophatikizana koyamwa mawu koyenera kuchepetsa phokoso m'malo ocheperako a UHV. Izi zili ndi tanthauzo lofunikira pakugwiritsa ntchito ukadaulo.
Ⅰ. Kusanthula muyeso wa phokoso la zida zazikulu zagawo la UHV
Panthawi yogwiritsira ntchito ma substations a UHV, magwero akuluakulu a phokoso amaphatikizapo ma transformer apamwamba-voltage, shunt reactors, substation structures, etc. Phokoso la thiransifoma limaphatikizapo phokoso la thupi ndi phokoso la chipangizo chozizira, phokoso la shunt reactor ndi phokoso lamagetsi, ndipo phokoso lachigawo chapansi ndi phokoso la corona. Phokoso la Corona nthawi zambiri limakhala lapakati mpaka pafupipafupi, limachepetsa mwachangu panthawi yofalitsa, ndipo limakhudza pang'ono. Phokoso lotsika kwambiri lomwe limapangidwa ndi mawonekedwe amkati a transfoma ndi ma shunt reactors amachepetsa pang'onopang'ono ndipo amakhala ndi mphamvu zambiri. Chifukwa chake, kuwongolera phokoso kwa ma transformer ndi ma shunt reactors ndikomwe kumayang'anira phokoso m'malo ocheperako.
- Kusanthula kwakukulu kwa phokoso la transformer
Mphamvu yamawu a transformer imayesedwa pogwiritsa ntchito njira yamphamvu ya mawu. Kutenga thiransifoma ya gawo limodzi ngati chinthu choyezera, mtunda wapakati pa mzere womwe waperekedwa ndi malo otulutsa mpweya ndi 2m, ndipo mizere iwiri yokhazikika imayikidwa, yomwe ili pa ndege yopingasa ya 2m ndi 4m motsatana. Malo onse oyezera ali pamzere wotchulidwa, ndipo mtunda wopingasa pakati pa malo oyandikana nawo ndi 1m. Ma probes amphamvu ya mawu amagwiritsidwa ntchito kuyeza mfundo ndi mfundo.
Pamene mphamvu ya gulu limodzi la thiransifoma ndi 2000MW, zotsatira zomveka zomveka zomveka za gawo C la thiransifoma mu Gulu I. Mphamvu ya mphamvu ya A-yolemera kwambiri ndi yaikulu mu 1/3 octave frequency band ndi ma frequency apakati a 100, 125, 160 ndi 200 Hz ya transformer UHV. Malinga ndi makina opangira phokoso la thiransifoma, phokoso lomwe lili mu bandi ya frequency iyi makamaka limachokera ku phokoso lamagetsi lamagetsi amtundu wa transformer. Chifukwa chake, pochepetsa phokoso la thiransifoma, kuyenera kuperekedwa patsogolo pakuchepetsa 100 ~ 200Hz frequency band. Panthawi yoyezera, mphamvu ya gulu limodzi la ma thiransifoma inali yokhazikika pa 2000MW, ndipo mphamvu yofananira ya A-lemedwe lamphamvu ya osinthira inali 102.7dB (A).
- Kuyeza ndi kusanthula phokoso lapamwamba lamagetsi lamagetsi
Njira yoyezera mphamvu yamagetsi yamagetsi ndi yofanana ndi ya transformer. Kutenga gawo B la choyatsira chofananira mugawo la UHV ngati chinthu choyezera, mtunda pakati pa mzere womwe waperekedwa ndi malo otulutsirako ndi 1m, ndipo mizere iwiri yokhazikika yokhala ndi kutalika kwa 1.5m ndi 3m imayikidwa motsatana. Mtunda wopingasa pakati pa malo oyandikana nawo ndi 1m.
Kusanthula kukuwonetsa kuti mu gulu lonse la 1/3 octave, zigawo zotsika kwambiri zimakhala ndi gawo lalikulu, pakati pawo mphamvu ya mawu pa 100Hz ndi yaikulu kwambiri, ikufika ku 96.4dB (A), yomwe ndi 11.5dB (A) yapamwamba kuposa mphamvu ya mawu a 200Hz. Mphamvu yamawu mu bandi ya 1/3 octave komwe 100Hz ilipo imakhala ndi 91.2% ya mphamvu imodzi yamphamvu yotsutsana ndi mawu. Chifukwa chake, zitha kutsimikizika kuti kusokoneza komwe kumachitika pamagawo amawu a riyakitala kumayambitsidwa ndi mafunde a 100Hz.
Ⅱ. Zida za porous ndi kuyesa kwa mbale za microperforated
Mu kapangidwe kaukadaulo wowongolera phokoso, nthawi zambiri zimakhala zovuta kukwaniritsa zotsatira zochepetsera phokoso zomwe zimayembekezeredwa pogwiritsa ntchito chinthu chimodzi choyamwa mawu ndi kuchiza kutchinjiriza. Chifukwa chake, kapangidwe ka zinthu zoyamwa mawu nthawi zambiri kamagwiritsidwa ntchito kuchepetsa phokoso. Makamaka m'malo okhala ndi voliyumu yayikulu komanso nthawi yayitali yolumikizira mawu, kugwiritsa ntchito kumakhala kofala kwambiri. Kuti tiphunzire kapangidwe koyamwa mawu koyenera kulamulira phokoso m'malo ocheperako a UHV, choyamba tiyenera kuganizira za kutchinjiriza ndi mawonekedwe oletsa moto a chinthucho, ndipo kachiwiri, tiyenera kuphatikiza njira zinazake kuti tidziwe kapangidwe koyamwa mawu.
Pakalipano, mbale zokhala ndi perforated ndi zipangizo zoyamwa mawu zimagwiritsidwa ntchito m'malo otsekemera a UHV kuti achepetse phokoso, koma zotsatira zake si zabwino mu bandi yotsika. Izi zimafunika kuphatikiza mawonekedwe amtundu wa zida zazikulu zagawo la UHV. Pambuyo pozindikira njira zenizeni zochepetsera phokoso, momwe mungasankhire zida zogwiritsira ntchito porous komanso momwe mungadziwire momwe zimamvekera phokoso zimakhala chinsinsi chowongolera phokoso mu substation. Otsatirawa, zitsanzo zitatu za mbale yaying'ono-perforated, thovu la melamine, ndi simenti ya thovu zimasankhidwa kuti ziphatikizidwe wina ndi mnzake kuti achite zoyeserera.
- Kuphatikizika kwa mbale za microperforated zamitundu iwiri
yaying'ono perforated mbale experimental zitsanzo, mmene perforation mlingo wa yaying'ono perforated mbale chitsanzo 1 ndi 1.5%, mbale makulidwe ndi 1mm, ndi pore awiri ndi 0.7mm; mlingo perforation wa yaying'ono perforated mbale mbale chitsanzo 2 ndi 1.1%, makulidwe mbale ndi 1mm, ndi pore awiri ndi 0.7mm, yaying'ono perforated mbale chitsanzo 3, mlingo perforation ndi 0.7%, makulidwe mbale ndi 1mm, ndipo m'mimba mwake dzenje ndi 0.7mm.
Ma seti awiri a zoyeserera adachitika pazophatikizira zamitundu iwiri ya micro-perforated plate. Kuyesera 1 kunali kuphatikizika kwa mbale yaying'ono-perforated 2 ndi mbale yaying'ono-perforated 1, ndi kuyesa 2 kunali kuphatikizika kwa mbale yaying'ono-perforated 1 ndi chitsanzo cha micro-perforated mbale 3. Maseti awiri oyesera pawiri-wosanjikiza yaying'ono-perforated mbale kuphatikiza dongosolo amasonyeza kuti phokoso mayamwidwe koyefiyanti pa 100HB ndi phokoso pazipita 0.7 Hz ndi phokoso pazipita 500. coefficient imawoneka pa 600Hz mpaka 600Hz m'mayesero onse awiri. Mu bandi yafupipafupi pamwamba pa XNUMXHz, kuchuluka kwa mawu kumachepa pang'onopang'ono.
- Kuphatikizika kwa simenti ya thovu ndi bolodi ya microperforated
Choyamba, kamangidwe kamene kamamva phokoso kamene kaphatikizira simenti ya thovu ndi mbale imodzi ya microperforated mbale inagwiritsidwa ntchito. Zoyeserera ziwiri zokhala ndi magawo osiyanasiyana zidachitika pophatikiza simenti ya thovu ndi mbale imodzi yokhala ndi ma perforated mbale. M'zoyesera zonse ziwiri, simenti ya thovu inayikidwa kutsogolo kwa mbale ya micro-perforated.
Pali pafupifupi palibe kusintha kwakukulu pakati pa deta ya Experiment 3 ndi Experiment 4. Phokoso lakuyamwitsa kwapangidwe kophatikizana kwenikweni silimasintha ndi kusintha pang'ono mu makulidwe a simenti ya thovu ndi mtunda wa pakati pa simenti ya thovu ndi mbale yaying'ono-perforated. Pa 100Hz, mphamvu yoyamwitsa phokoso ili pafupi ndi 0.4, pa 250Hz, mphamvu yoyamwitsa phokoso imafika pamtunda wake, ndipo pafupifupi 900Hz, imafika pamtengo wapatali wa coefficient yoyamwitsa phokoso kachiwiri.
- Chithovu cha melamine ndi kuphatikiza kwamagulu ang'onoang'ono ang'onoang'ono
Ma seti awiri a zoyeserera adachitika pakuphatikiza kwa thovu la melamine ndi mbale zokhala ndi ma perforated osanjikiza amodzi. M'magulu onse awiri oyesera, thovu la melamine linayikidwa pamaso pa mbale za micro-perforated. Ma coefficients amayamwidwe amawu pa 100Hz m'magulu onse awiri oyesera ali mozungulira 0.7, ndipo pakati pa 100Hz ndi 500Hz, ma coefficients amawu onse ali pamwamba pa 0.7. Pafupi ndi 500Hz, kuchuluka kwa mayamwidwe kumachepa, koma kuchuluka kwa mayamwidwe kumawonjezeka pang'onopang'ono. Kuphatikizikaku kumakhala ndi mayamwidwe abwino kwambiri m'mabandi otsika komanso okwera kwambiri.
Ⅲ. Kusanthula zotsatira zoyesera
Malinga ndi makhalidwe a phokoso gwero la zida waukulu wa substation UHV amene ali odziwika mu otsika pafupipafupi gulu, zoyesera anachitidwa ndi kusankha yaying'ono perforated mbale gulu kapangidwe, simenti thovu kuphatikiza yaying'ono perforated mbale gulu gulu, ndi melamine thovu kuphatikiza yaying'ono perforated mbale gulu kapangidwe dongosolo. Zotsatira zoyeserera zikuwonetsa kuti ma ziwembu onse atatu ophatikizira amatha kukwaniritsa mayamwidwe ena amtundu wocheperako, koma momwe angagwiritsire ntchito muukadaulo weniweni amafunikira njira zochepetsera phokoso.
- Kuphatikizika kwa mbale ya Micro-perforated
Ma board okhala ndi magawo awiri ang'onoang'ono amatha kukulitsa gulu la mayamwidwe amtundu umodzi wamagulu ang'onoang'ono okhala ndi perforated. Kutengera ndi mfundo ya impedance yofananira, mfundo yophatikizira kapangidwe kake ndikuti kuchuluka kwa ma perforation akutsogolo kwa matabwa ang'onoang'ono ang'onoang'ono ndi akulu kuposa kuchuluka kwa matabwa akumbuyo. Mapangidwe ophatikizika a mapanelo ang'onoang'ono ang'onoang'ono amatha kukwaniritsa kutulutsa kwamphamvu kopitilira 0.7 mumayendedwe pafupipafupi a 150-800Hz pomwe makulidwe a mawonekedwe onse ophatikizidwa ndi 20cm. Pamene makulidwe a dongosolo lonse ophatikizana ndi 30cm, akhoza kukwaniritsa phokoso mayamwidwe coefficient oposa 0.7 mu pafupipafupi osiyanasiyana 100-800Hz.
- Simenti yokhala ndi thovu kuphatikiza ma mbale ang'onoang'ono okhala ndi perforated
Kuonjezera simenti yotulutsa thovu kutsogolo kwa bolodi yokhala ndi ma perforated kutha kukulitsa gulu la mayamwidwe afupipafupi a bolodi lokhala ndi ma perforated board, ndipo simenti yokhala ndi thovu imathanso kugwira ntchito yosayaka moto.
Simenti yokhala ndi thovu kuphatikiza bolodi yokhala ndi gawo limodzi laling'ono-perforated imatha kutulutsa mawu opitilira 0.7 pafupipafupi 150-1000Hz pomwe makulidwe a mawonekedwe onse ophatikizidwa ndi 20cm. Simenti yokhala ndi thovu kuphatikiza mapanelo ang'onoang'ono ang'onoang'ono ang'onoang'ono ang'onoang'ono amatha kutulutsa mawu opitilira 0.7 pafupipafupi 150-1400Hz pomwe makulidwe ake onse ophatikizidwa ndi 20cm. Pamene makulidwe a dongosolo lonse ophatikizana ndi 30cm, akhoza kukwaniritsa phokoso mayamwidwe coefficient oposa 0.7 mu pafupipafupi osiyanasiyana 100-1400Hz. Pa nthawi yomweyo, ang'onoang'ono kachulukidwe chochuluka wa thovu simenti, kukula porosity, ndi bwino otsika pafupipafupi phokoso mayamwidwe.
- Pakuti ophatikizana dongosolo la zotengera mawu ndi mbale yaying'ono-perforated, phokoso-absorbent zakuthupi akhoza kukulitsa phokoso-absorbeng pafupipafupi gulu la mbale yaying'ono perforated ndi kuonjezera mtunda pakati pa phokoso absorbent ndi yaying'ono perforated mbale. Kuchuluka kwa mayamwidwe amawu apakati ndi ma frequency apamwamba kumawonjezeka, ndipo chiwopsezo cha mayamwidwe amawu chimasunthira kumayendedwe otsika. Powonjezera makulidwe azinthu zotulutsa mawu, kutsika kwamphamvu kwapang'onopang'ono kumachepetsa pang'ono, ndipo kuchuluka kwa mayamwidwe apakati ndi okwera kwambiri kumawonjezeka. Kuchulukitsa makulidwe a pabowo kuseri kwa mbale ya micro-perforated kumatha kukulitsa kuyamwa kwamawu otsika pafupipafupi. Zipangizo zoyamwitsa mawu kuphatikiza mapanelo ang'onoang'ono okhala ndi zigawo ziwiri zimakhala ndi mayamwidwe abwinoko komanso ma frequency amawu otambalala kuposa zida zoyamwa mawu kuphatikiza mapanelo ang'onoang'ono osanjikiza amodzi.
Zitha kuwonedwa kuchokera pakuwunika kwa data yoyesera kuti chithovu cha melamine kuphatikiza mbale yokhala ndi gawo limodzi laling'ono-perforated imatha kukwaniritsa mayamwidwe omveka opitilira 0.6 mumayendedwe pafupipafupi a 200-1600Hz pomwe makulidwe ake onse ophatikizidwa ndi 20cm. Pamene makulidwe a dongosolo lonse lophatikizana ndi 30cm, phokoso la mayamwidwe lopitirira 0.6 likhoza kukwaniritsidwa pafupipafupi 100-1600Hz. Melamine thovu kuphatikiza mapanelo awiri wosanjikiza yaying'ono-perforated akhoza kukwaniritsa phokoso mayamwidwe coefficient oposa 0.7 mu pafupipafupi osiyanasiyana 200-1600Hz pamene makulidwe a lonse ophatikizana dongosolo ndi 20cm. Pamene makulidwe a dongosolo lonse lophatikizana ndi 30cm, phokoso la mayamwidwe lopitirira 0.7 likhoza kukwaniritsidwa pafupipafupi 100-1600Hz.
Kutengera kuwunika kwa ma frequency aphokoso a thiransifoma yayikulu ya UHV ndi riyakitala yothamanga kwambiri, mphamvu yaphokoso ya thiransifoma yayikulu ya UHV imakhazikika kwambiri pa 100-200Hz, ndipo mphamvu yaphokoso ya riyakitala yothamanga kwambiri imakhazikika pa 100Hz. Kuti musankhe chinthu chochepetsera phokoso, m'pofunika kuphatikiza mafupipafupi a magwero awiri akuluakulu a phokoso. Panthawi imodzimodziyo, njira zochepetsera phokoso zimafunikanso kuphatikizidwa ndi masanjidwe apamalo a substation kuti athetse phokoso ndi kuphatikiza koyenera kwa zipangizo ndi njira.
Kuti mudziwe zambiri zokhudza SINOYQX Melamine Foam, chonde titumizireni uthenga pa [email protected] kapena titumizireni uthenga pa: +86-28-8411-1861.
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