Okwangoku, i-firewall ye-transformers kunye ne-reactors kwi-substations ye-UHV yasekhaya ihlala ithatha izakhiwo zekhonkrithi ezifakwe kwi-concrete okanye izakhiwo ezenziwe ngezitena kunye nomgubo, ezineempembelelo ezithile zokugquma isandi. Nangona kunjalo, ngenxa yezandi eziphantsi zengxolo ye-transformers kunye ne-reactors kunye nobude obude bezandi zamaza esandi, i-diffraction yabo yengxolo kunye namandla okuhambisa anamandla kakhulu, ngoko ke ukugquma kwesandi kunye nemiphumo yokunciphisa ingxolo ihlala imbi. Ukongezelela, izithintelo zesandi zangoku kunye nezandi zokuvala isandi se-UHV substations azenzelwe ngokukodwa iimpawu zengxolo ephantsi ye-substation, kwaye umphumo wokunciphisa ingxolo awufanelekanga. Ukuba sinokuqwalasela iimpawu ze-UHV substations ezilawulwa yi-mid- and low-frequency ingxolo, kwaye samkele isakhiwo esixubileyo esibamba isandi esinemisebenzi yokuthulisa kunye nesandi, sinethemba lokuba inokunciphisa ngokufanelekileyo i-mid-frequency kunye ne-low-frequency ingxolo kwaye ibe ne-flame retardant kunye ne-insulation properties. Oku kubaluleke kakhulu ekuphuculeni umgangatho wokusingqongileyo we-acoustic kwizitishi.
Ngokusekelwe koku, eli nqaku lihlalutya iimpawu zobukhulu bomthombo wengxolo wezixhobo eziphambili zesitishi se-UHV. Ngenxa yeemfuno zezinto ezikwisitishi ukuba zibe neempawu ezithintela ilangatye, ezikhusela ubushushu kunye nezinye izinto, sikhethe ukwenza uvavanyo lokufunxa isandi olunye noludibeneyo kwiisampuli ze -melamine foam , iisampuli zeplate ezineembobo ezincinci, kunye neesampuli zesamente ezineembobo, kwaye sicebise isakhiwo esidibeneyo esifunxa isandi esifanelekileyo sokunciphisa ingxolo kwisitishi se-UHV. Oku kunesikhokelo esibalulekileyo kwizicelo zobunjineli ezisebenzayo.
Ⅰ. Uhlalutyo lomlinganiselo wengxolo wezixhobo eziphambili zesikhululo se-UHV
Ngexesha lokusebenza kwe-UHV substations, imithombo yengxolo ephambili ibandakanya i-high-voltage transformers, i-shunt reactors, izakhiwo ze-substation, njl. Ingxolo ye-transformer ibandakanya ingxolo yomzimba kunye nomsindo wesixhobo sokupholisa, ingxolo ye-shunt reactor yingxolo ye-electromagnetic, kunye ne-substation structure ingxolo yi-corona. Ingxolo yeCorona iqhelekile ukuba phakathi ukuya phezulu, ithomalalisa ngokukhawuleza ngexesha losasazo, kwaye inoluhlu lweempembelelo ezincinci. Isandi esisezantsi esiveliswa yisakhiwo sangaphakathi se-transformers kunye ne-shunt reactors iyancipha ngokukhawuleza kwaye ineempembelelo ezininzi. Ngoko ke, ukulawulwa kwengxolo ye-transformers kunye ne-shunt reactors kugxininiso lokulawula ingxolo kwizitishi.
- Uhlalutyo oluphambili lokulinganisa ingxolo ye-transformer
Umgangatho wamandla omsindo we-transformer ulinganiswa ngokusebenzisa indlela yokuqina kwesandi. Ukuthatha i-transformer yesigaba esisodwa njengento yokulinganisa, umgama phakathi komgca we-contour omiselweyo kunye ne-reference emission surface yi-2m, kunye nemigca emibini emiselweyo ye-contour imiselwe, ebekwe kwi-plane ethe tye ye-2m kunye ne-4m ngokulandelanayo. Zonke iindawo zokulinganisa zibekwe kumgca wecontour ochaziweyo, kwaye umgama othe tye phakathi kweendawo zokulinganisa ezimeleneyo yi-1m. Izandi zokuxinana kwezandi zisetyenziselwa ukulinganisa inqaku ngenqaku.
Xa umthwalo wamandla weqela elinye le-transformer yi-2000MW, iziphumo zokulinganisa ukuqina kwesandi kwisigaba C se-transformer kwiQela I. Inqanaba le-A-weighted sound power level yeyona inkulu kwi-1/3 ye-octave frequency band kunye ne-centre frequency 100, 125, 160 kunye ne-200 Hz ye-transformer ye-UHV. Ngokwendlela yokuvelisa ingxolo ye-transformer, ingxolo kule bhendi yefrikhwensi ivela ikakhulu kwingxolo ye-electromagnetic yomzimba wokuguqula. Ke ngoko, xa unciphisa ingxolo ye-transformer, kufuneka kunikwe ingxolo ekunciphiseni i-100 ~ 200Hz frequency band. Ngethuba lokulinganisa, umthwalo wamandla weqela elinye labaguquli bezinzile kwi-2000MW, kwaye i-A-weighted iyonke i-A-weighted power level level of the transformers was 102.7dB (A).
- Umlinganiselo kunye nohlalutyo lwengxolo ye-reactor ephezulu yombane
Indlela yokulinganisa inqanaba lamandla esandi se-reactor iyafana naleyo ye-transformer. Ukuthatha isigaba B se-parallel reactor kwisikhululo esincinci se-UHV njengento yokulinganisa, umgama phakathi komgca we-contour omiselweyo kunye nomphezulu wokukhutshwa kwereferensi yi-1m, kunye nemigca emibini emiselweyo yecontour enobude obuyi-1.5m kunye ne-3m iseti ngokulandelelanayo. Umgama othe tye phakathi kweendawo zokulinganisa ezikufutshane yi-1m.
Uhlalutyo lubonisa ukuba kuyo yonke ibhendi ye-1/3 ye-octave, iinqununu ze-low-frequency accounts ze-akhawunti yomlinganiselo omkhulu, phakathi kwayo amandla omsindo kwi-frequency ye-100Hz iyona nkulu, ifikelela kwi-96.4dB (A), eyi-11.5dB (A) ephezulu kunezinga lamandla omsindo we-200Hz. Amandla omsindo kwi-1/3 ye-octave band apho i-100Hz ikhona i-akhawunti ye-91.2% yesigaba esisodwa esiphezulu samandla achasene nesandi. Ke ngoko, kunokumiselwa ukuba isenzeko sokuphazamiseka kwindawo yokuhanjiswa kwesandi se-reactor sibangelwa yi-100Hz isandi somsindo.
Ⅱ. Izixhobo zePorous kunye ne-micro-perforated plate experiments
Kuyilo lobunjineli bokulawula ingxolo, kudla ngokuba nzima ukufikelela kwisiphumo sokunciphisa ingxolo esilindelekileyo ngokusebenzisa into enye yokufunxa isandi kunye nonyango lokuthintela ingxolo. Ke ngoko, izakhiwo ezidibeneyo zezinto ezifunxa isandi zihlala zisetyenziselwa ukunciphisa ingxolo. Ingakumbi kwiindawo zangaphakathi ezinevolumu enkulu kunye namaxesha amade okuphindaphindeka, ukusetyenziswa kuqhelekile kakhulu. Ukuze sifunde isakhiwo esifunxa isandi esifanelekileyo sokulawula ingxolo kwizikhululo ze-UHV, kufuneka siqale siqwalasele ukuthintela ingxolo kunye neempawu ezithintela ilangatye zezinto, kwaye okwesibini, kufuneka sidibanise amanyathelo athile ukumisela isakhiwo esifunxa isandi.
Okwangoku, iipleyiti ezinemingxuma kunye nezixhobo zokufunxa isandi zisetyenziselwa ukuvalela isandi se-insulation substations ye-UHV ukunciphisa ingxolo, kodwa umphumo awulungile kwibhendi ephantsi. Oku kufuna ukudibanisa iimpawu zomthombo wesandi zezona zixhobo ziphambili zesikhululo se-UHV. Emva kokumisela imilinganiselo ethile yokunciphisa ingxolo, indlela yokukhetha izinto ezixubileyo ezithatha isandi kunye nendlela yokumisela isakhiwo esibamba isandi siba sisitshixo sokulawula ingxolo kwisitishi. Koku kulandelayo, iisampulu ezintathu zepleyiti ene-micro-perforated, igwebu le-melamine, kunye nesamente enegwebu zikhethwa ukuba zidityaniswe omnye komnye ukuze kwenziwe uvavanyo.
- Umdibaniso wepleyiti ene-micro-perforated kabini
Iisampulu zokulinga ipleyiti Micro-perforated, apho izinga lokugqojozwa kwesampulu yepleyiti enemingxuma emincinci 1 yi-1.5%, ubukhulu bepleyiti yi-1mm, kunye nedayamitha yepore yi-0.7mm; izinga lokugqobhoza kwesampulu yepleyiti enemingxuma emincinci 2 yi-1.1%, ubukhulu bepleyiti yi-1mm, kunye nedayamitha yepore yi-0.7mm, isampulu yeplate ye-Micro-perforated 3, isantya sokugqobhoza yi-0.7%, ubukhulu bepleyiti yi-1mm, kunye nobubanzi bomngxuma yi-0.7mm.
Iiseti ezimbini zovavanyo zenziwa kwidibaniso yepleyiti ene-micro-perforated ephindwe kabini. Uvavanyo lwe-1 lwaluyindibaniselwano yesampula yeplate ye-micro-perforated 2 kunye ne-micro-perforated plate sample 1, kunye novavanyo lwe-2 lwaluyindibaniselwano yesampuli ye-micro-perforated plate 1 kunye ne-micro-perforated plate sample 3. Iiseti ezimbini zeemvavanyo kwi-double-layer micro-perforated plate division structure ibonisa ukuba i-coefficient yokufunxa isandi kwi-100Hz kunye nexabiso lesandi esiphezulu se-0.7Hz, kunye nexabiso le-sound ye-500Hz. i-coefficient ibonakala kwi-600Hz ukuya kwi-600Hz kuzo zombini iiseti zemifuniselo. Kwibhendi yefrikhwensi ngaphezulu kwe-XNUMXHz, i-coefficient yokufunxa isandi ngokuthe ngcembe iyancipha.
- Idibaniso yesamente enegwebu kunye nebhodi ye-micro-perforated
Okokuqala, isandi esidibanisa isandi esidibanisa i-samente ene-foam kunye ne-single-layer micro-perforated plate isetyenziswe. Iimvavanyo ezimbini ezineeparamitha ezahlukeneyo zenziwa ngokudibanisa i-samente enegwebu kunye neplate ye-micro-perforated plate eyodwa. Kuzo zombini iimvavanyo, i-samente enegwebu ibekwe phambi kwepleyiti ene-micro-perforated.
Kukho phantse akukho tshintsho olukhulu phakathi kwedatha ye-Experiment 3 kunye ne-Experiment 4. Ukusebenza kwesandi sokufunxa kwesakhiwo esidityanisiweyo asitshintshi ngokutshintsha okuncinci kubukhulu besamente enegwebu kunye nomgama phakathi kwesamente enegwebu kunye nepleyiti ye-micro-perforated. Kwi-100Hz, i-coefficient yokufunxa isandi ijikeleze i-0.4, kwi-250Hz, i-coefficient yokufunxa isandi ifikelela kubuninzi bayo, kwaye malunga ne-900Hz, ifikelela kwixabiso eliphezulu le-coefficient yokufunxa isandi kwakhona.
- I-Melamine foam kunye nendibaniselwano yephaneli ye-micro-perforated
Iiseti ezimbini zovavanyo zenziwe ngokudityaniswa kwe-melamine foam kunye ne-single-layer micro-perforated plates. Kuzo zombini iiseti zovavanyo, i-melamine foam ibekwe phambi kweeplate ezine-micro-perforated. I-coefficients yokufunxa isandi kwi-100Hz kuwo omabini amaqela ovavanyo ajikeleze i-0.7, kwaye phakathi kwe-100Hz kunye ne-500Hz, i-coefficients yokufunxa isandi ingaphezulu kwe-0.7. Malunga ne-500Hz, i-coefficient yokufunxa isandi iyancipha, kodwa njengoko isantya sinyuka, i-coefficient yokufunxa isandi ngokuthe ngcembe iyanda. Le ndibaniselwano inesiphumo esifanelekileyo sokufunxa isandi kuzo zombini iibhendi zefrikhwensi ephantsi kunye ne-high-frequency.
Ⅲ. Uhlalutyo lweziphumo zovavanyo
Ngokutsho kweempawu zomthombo wengxolo wesixhobo esiphambili se-UHV substation evelele kwibhendi ye-frequency ephantsi, iimvavanyo zenziwe ngokukhetha i-micro-perforated plate composite structure, i-samente enegwebu kunye ne-micro-perforated plate composite structure, kunye ne-foam ye-melamine kunye ne-micro-perforated plate composite structure. Iziphumo zovavanyo zibonisa ukuba zontathu izikimu ezidityanisiweyo zinokufikelela kwisiphumo esithile sokufunxa isandi kwibhendi yefrikhwensi ephantsi, kodwa indlela yokuyisebenzisa kubunjineli bokwenyani ifuna amanyathelo athile okunciphisa ingxolo.
- Isakhiwo sokudibanisa ipleyiti ene-Micro-perforated
Iibhodi ezinemingxuma ephindwe kabini zinokwandisa isandi sokufunxa isandi sebhodi enye enemingxuma emincinci. Ngokusekelwe kumgaqo wokulinganisa i-impedance, umgaqo woyilo oludityanisiweyo kukuba izinga lokutyhoboza kwinqanaba langaphambili leebhodi ze-micro-perforated likhulu kunomlinganiselo wokubhoboza umqolo weebhodi. Idizayini edibeneyo yeepaneli ze-micro-perforated panels inokufezekisa i-coefficient ye-sound absorption engaphezulu kwe-0.7 kwi-frequency range ye-150-800Hz xa ubukhulu besakhiwo sonke esidibeneyo si-20cm. Xa ubukhulu besakhiwo esihlangeneyo siphela yi-30cm, sinokufikelela kwi-coefficient ye-sound absorption engaphezulu kwe-0.7 kwi-frequency range ye-100-800Hz.
- Isamente enogwebu kunye nesakhiwo sepleyiti enemingxuma emincinci
Ukongeza i-samente enogwebu phambi kwebhodi ene-micro-perforated inokwandisa isandi sokufunxa ibhendi ye-micro-perforated board, kunye nesamente enegwebu inokudlala indima yomlilo.
I-samente enegwebu kunye nebhodi enye ye-micro-perforated ibhodi inokufezekisa i-coefficient yokufunxa isandi ngaphezu kwe-0.7 kwi-frequency range ye-150-1000Hz xa ubukhulu besakhiwo esidibeneyo si-20cm. I-samente ene-foam kunye ne-double-layer micro-perforated panels inokufezekisa i-coefficient yokufunxa isandi ngaphezu kwe-0.7 kwi-frequency range ye-150-1400Hz xa ubukhulu besakhiwo sonke esidibeneyo buyi-20cm. Xa ubukhulu besakhiwo esihlangeneyo sonke buyi-30cm, sinokufikelela kwi-coefficient yokufunxa isandi ngaphezu kwe-0.7 kwi-frequency range ye-100-1400Hz. Kwangaxeshanye, okukhona kuncinci ukuxinana kwesamente enogwebu, kokukhona kukho iporosity, kwaye kokukhona isiphumo sokufunxa isandi esisezantsi.
- Kwisakhiwo esidibeneyo se imathiriyeli efunxa isandi kunye ne-micro-perforated plate, i-sound-absorbing material inokwandisa i-sound-absorbing frequency band ye-micro-perforated plate kunye nokwandisa umgama phakathi kwe-sound-absorbing kunye ne-micro-perforated plate. I-coefficient yokufunxa isandi se-middle and high frequencies iyanda, kwaye isandi sokufunxa isandi sihamba ukuya kumaza aphantsi. Ngokwandisa ubuninzi bezinto ezithatha isandi, i-coefficient ye-low-frequency absorption coefficient iyancipha kancinane, kwaye i-middle-and-high-frequency absorption coefficient yanda. Ukonyusa ubukhulu bomaleko womqolo emva kwepleyiti enemingxuma emincinci kunokunyusa ukufunxwa kwesandi esisezantsi. Izixhobo ezifunxa isandi kunye neepaneli ezinemikrozo ephindwe kabini zinezandi ezingcono zokufunxa kunye neebhendi ezifunxa isandi ezibanzi kunezixhobo ezifunxa isandi kunye neepaneli ezinemikrozo enemikrozo ekumgangatho omnye.
Inokubonwa kuhlalutyo lwedatha yovavanyo ukuba i-melamine foam kunye ne-single-layer micro-perforated plate inokufezekisa i-coefficient yokufunxa isandi esingaphezulu kwe-0.6 kwi-frequency range ye-200-1600Hz xa ubukhulu besakhiwo sonke esidibeneyo si-20cm. Xa ubukhulu besakhiwo esihlangeneyo siphela yi-30cm, i-coefficient yokufunxa isandi engaphezulu kwe-0.6 inokufumaneka kwi-frequency range ye-100-1600Hz. I-Melamine foam kunye ne-double-layer micro-perforated panels inokufezekisa i-coefficient yokufunxa isandi esingaphezulu kwe-0.7 kuluhlu lwamaza obuninzi be-200-1600Hz xa ubukhulu besakhiwo esidibeneyo si-20cm. Xa ubukhulu besakhiwo esihlangeneyo siphela yi-30cm, i-coefficient yokufunxa isandi ngaphezu kwe-0.7 inokufumaneka kwi-frequency range ye-100-1600Hz.
Ngokusekwe kuhlalutyo lweempawu zokuphindaphinda kwengxolo ye-UHV engundoqo ye-transformer kunye ne-high-voltage shunt reactor, amandla engxolo ye-UHV main transformer agxininiswe kakhulu kwi-100-200Hz, kwaye amandla engxolo ye-high-voltage reactor agxininiswe kakhulu kwi-100Hz. Ukukhetha izinto zokunciphisa ingxolo, kuyimfuneko ukudibanisa i-frequencies yemithombo emibini ephambili yengxolo. Kwangaxeshanye, iindlela zokunciphisa ingxolo nazo kufuneka zidityaniswe noyilo lwendawo yesikhululo esingaphantsi kokulawula ingxolo ngokudityaniswa kwemathiriyeli kunye neendlela.
Ukuze ufumane ulwazi oluthe kratya malunga ne-SINOYQX Melamine Foam, nceda usiqhagamshelane nathi ku- [email protected] okanye usithumelele ilizwi ku: +86-28-8411-1861.
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