M'dziko la thiransifoma, mawu oti "loop feed" ndi "radial feed" nthawi zambiri amalumikizidwa ndi mawonekedwe a HV bushing for compartmentalized padmount transformers. Mawu awa, komabe, sanachokere ku ma transformer. Amachokera ku lingaliro lalikulu la kugawa mphamvu mumagetsi amagetsi (kapena mabwalo). Transformer imatchedwa loop feed transformer chifukwa kasinthidwe kake kamene kamayenderana ndi njira yogawa lupu. Zomwezo zimagwiranso ntchito kwa ma transformer omwe timawayika ngati chakudya cha radial-mawonekedwe awo a bushing nthawi zambiri amakhala ogwirizana ndi ma radial system.
Mwa mitundu iwiri ya ma transfoma, mtundu wa loop feed ndiwosinthika kwambiri. Chigawo cha chakudya cha loop chimatha kutengera masanjidwe a ma radial ndi loop system, pomwe zosinthira ma radial feed pafupifupi nthawi zonse zimawonekera mumayendedwe a radial.
Ma Radial ndi Loop Feed Distribution Systems
Makina onse a ma radial ndi loop amayesetsa kuchita zomwezo: kutumiza mphamvu yamagetsi yapakati kuchokera ku gwero wamba (kawirikawiri kagawo kakang'ono) kupita ku imodzi kapena zingapo zotsika pansi zomwe zimatumiza katundu.
Chakudya cha radial ndichosavuta paziwirizi. Tangoganizani bwalo lokhala ndi mizere ingapo (kapena ma radian) akuchokera kumalo amodzi apakati, monga momwe tawonetsera pa Chithunzi 1. Malo apakatiwa akuyimira gwero la mphamvu, ndipo mabwalo omwe ali kumapeto kwa mzere uliwonse akuyimira otsika pansi. Pakukhazikitsa uku, thiransifoma iliyonse imadyetsedwa kuchokera kumalo omwewo mu dongosolo, ndipo ngati gwero la mphamvu likusokonezedwa kuti likonzedwe, kapena ngati vuto lichitika, dongosolo lonse limatsika mpaka vutolo litathetsedwa.
Chithunzi 1: Chithunzi pamwambapa chikuwonetsa ma transfoma olumikizidwa mu njira yogawa ma radial. Malo apakati akuyimira gwero la mphamvu zamagetsi. Sikweya iliyonse imayimira thiransifoma yomwe imadyetsedwa kuchokera kumagetsi amodzi omwewo.
Chithunzi 2: Mu njira yogawa chakudya cha loop, ma transfoma amatha kudyetsedwa ndi magwero angapo. Ngati kulephera kwa chingwe cha feeder cha Source A kumachitika, makinawo amatha kuyendetsedwa ndi zingwe zophatikizira zolumikizidwa ku Source B popanda kutayika kwakukulu kwa ntchito.
Mu dongosolo la loop, mphamvu imatha kuperekedwa kuchokera ku magwero awiri kapena kuposerapo. M'malo modyetsa ma transfoma kuchokera kumalo amodzi apakati monga momwe zilili mu Chithunzi 1, ndondomeko ya malupu yomwe ikuwonetsedwa mu Chithunzi 2 imapereka malo awiri osiyana omwe mphamvu zingaperekedwe. Ngati gwero limodzi lamagetsi silinapezeke pa intaneti, linalo likhoza kupitiriza kupereka mphamvu ku dongosolo. Kuperewera kumeneku kumapereka kupitiliza kwa ntchito ndipo kumapangitsa kuti loop system ikhale chisankho chokondedwa kwa ogwiritsa ntchito ambiri, monga zipatala, masukulu amakoleji, ma eyapoti, ndi malo akuluakulu ogulitsa mafakitale. Chithunzi 3 chimapereka chithunzithunzi chapafupi cha ma transformer awiri omwe akuwonetsedwa mu loop system kuchokera pa Chithunzi 2.
Chithunzi 3: Chojambula pamwambapa chikuwonetsa zosintha ziwiri za loop feed zolumikizidwa palimodzi mu loop system yokhala ndi mwayi wodyetsedwa kuchokera kumodzi mwamagetsi awiri.
Kusiyanitsa pakati pa ma radial ndi loop system kungafotokozedwe mwachidule motere:
Ngati thiransifoma imalandira mphamvu kuchokera kumalo amodzi okha mu dera, ndiye kuti dongosololi ndi lozungulira.
Ngati thiransifoma imatha kulandira mphamvu kuchokera ku mfundo ziwiri kapena zingapo kuzungulira, ndiye kuti dongosololi ndi loop.
Kuyang'anitsitsa kwa otembenuza mu dera sikungasonyeze momveka bwino ngati dongosololi ndi lozungulira kapena lozungulira; monga tidanenera koyambirira, ma feed a loop feed ndi ma radial feed transformers amatha kukhazikitsidwa kuti azigwira ntchito mumayendedwe amtundu uliwonse (ngakhalenso, ndizosowa kuwona chosinthira cha radial feed mu loop system). Mapulani amagetsi ndi mzere umodzi ndiye njira yabwino yodziwira masanjidwe ndi masinthidwe adongosolo. Izi zikunenedwa, poyang'anitsitsa kasinthidwe koyambirira kwa ma radial ndi loop feed transformers, nthawi zambiri zimakhala zotheka kupeza chidziwitso chodziwika bwino chokhudza dongosololi.
Ma Radial ndi Loop Feed Bushing Configurations
M'ma transfoma a padmount, kusiyana kwakukulu pakati pa chakudya cha radial ndi loop kuli pa pulayimale/HV bushing configuration (mbali yakumanzere ya kabati ya transformer). Pachiyambi cha chakudya cha radial, pali bushing imodzi kwa oyendetsa magawo atatu omwe akubwera, monga momwe tawonetsera pa Chithunzi 4. Kapangidwe kameneka kamapezeka kawirikawiri pamene transformer imodzi yokha ikufunika kuti igwiritse ntchito malo onse kapena malo. Monga tiwona mtsogolomu, ma radial feed transformers nthawi zambiri amagwiritsidwa ntchito pagawo lomaliza pamndandanda wa ma transfoma olumikizidwa pamodzi ndi zoyambira za loop feed (onani Chithunzi 6).
Chithunzi 4:Masinthidwe a ma radial feed amapangidwira chakudya chimodzi choyambirira chomwe chikubwera.
Ma primaries a looop feed ali ndi zitsamba zisanu ndi chimodzi m'malo mwa zitatu. Kukonzekera kofala kwambiri kumadziwika kuti V Loop yokhala ndi magulu awiri a zitsamba zitatu zoyenda (onani Chithunzi 5) -zitsamba zitatu kumanzere (H1A, H2A, H3A) ndi zitatu kumanja (H1B, H2B, H3B), monga tafotokozera. mu IEEE Std C57.12.34.
Chithunzi 5: Kukonzekera kwa loop feed kumapereka mwayi wokhala ndi ma feed awiri oyamba.
Kugwiritsa ntchito kofala kwa pulayimale ya sikisi-bushing ndikulumikiza ma transfoma angapo a loop feed palimodzi. Pakukhazikitsa uku, chakudya chothandizira chomwe chikubwera chimabweretsedwa mu chosinthira choyamba pamndandanda. Chigawo chachiwiri cha zingwe chimachokera ku B-side bushings ya unit yoyamba kupita ku A-side bushings ya transformer yotsatira pamndandanda. Njira iyi yopangira ma daisy-chaining ma transfoma awiri kapena kuposerapo pamzere imatchedwanso "loop" ya ma transformer (kapena "looping transformers palimodzi"). Ndikofunika kusiyanitsa pakati pa "loop" (kapena daisy chain) ya ma transformer ndi loop feed monga ikukhudzana ndi ma transformer bushings ndi machitidwe ogawa magetsi. Chithunzi 6 chikufotokoza chitsanzo chabwino cha loop ya ma transfoma omwe amaikidwa mu radial system. Ngati mphamvu itatayika pa gwero, ma transformer atatu onse adzakhala opanda intaneti mpaka mphamvu itabwezeretsedwa. Zindikirani, kuyang'anitsitsa kwa ma radial feed unit kumanja kwakutali kungasonyeze dongosolo la radial, koma izi sizingakhale zomveka ngati tingoyang'ana mayunitsi ena awiri.
Chithunzi 6: Gulu ili la otembenuza limadyetsedwa kuchokera ku gwero limodzi kuyambira pa thiransifoma yoyamba mndandanda. Chakudya choyambirira chimaperekedwa kudzera mu thiransifoma iliyonse pamzere mpaka gawo lomaliza pomwe amathetsedwa.
Ma fuse apakati apakati a bayonet amatha kuwonjezeredwa ku transformer iliyonse, monga momwe tawonetsera pa Chithunzi 7. Kusakaniza koyambirira kumawonjezera chitetezo chowonjezera cha magetsi-makamaka pamene ma transformer angapo ogwirizanitsidwa palimodzi amasakanikirana.
Chithunzi 7:Transformer iliyonse imakhala ndi chitetezo chake chamkati.
Ngati cholakwika chachiwiri chikachitika pagawo limodzi (Chithunzi 8), kusakanikirana koyambirira kumasokoneza kutuluka kwa transcurrent pa thiransifoma yolakwika isanathe kufikira mayunitsi ena onse, ndipo mphamvu yanthawi zonse imapitilira kudutsa gawo lolakwika. otsala thiransifoma mu dera. Izi zimachepetsa nthawi yopumira ndikutumiza kulephera kwa gawo limodzi pomwe mayunitsi angapo alumikizidwa palimodzi mudera lanthambi imodzi. Kukonzekera uku kokhala ndi chitetezo chamkati mopitilira muyeso kutha kugwiritsidwa ntchito pama radial kapena loop system-muzochitika zilizonse, fusesi yothamangitsa idzalekanitsa gawo lolakwika ndi katundu womwe umagwira.
Chithunzi 8: Pakachitika cholakwika cha mbali ya katundu pagawo limodzi pamndandanda wa thiransifoma, kusakanikirana koyambirira kudzalekanitsa gawo lolakwika kuchokera ku ma transfoma ena mu loop-kuteteza kuwonongeka kwina ndikulola ntchito yosasweka kwa dongosolo lonselo.
Kugwiritsa ntchito kwina kwakusintha kwa loop feed bushing ndikulumikiza ma feed awiri osiyana (Feed A ndi Feed B) kugawo limodzi. Izi ndi zofanana ndi zomwe zidachitika kale pa Chithunzi 2 ndi Chithunzi 3, koma ndi gawo limodzi. Pachithunzichi, masiwichi amtundu umodzi kapena angapo omizidwa ndi mafuta amayikidwa mu thiransifoma, zomwe zimapangitsa kuti chipangizocho chizisinthana pakati pa ma feed awiriwo ngati pakufunika. Kusintha kwina kudzalola kusinthana pakati pa chakudya chilichonse popanda kutaya mphamvu kwakanthawi ndi katundu yemwe akutumizidwa—ubwino wofunikira kwa ogwiritsa ntchito omwe amayamikira kupitiliza kwa magetsi.
Chithunzi 9: Chithunzi pamwambapa chikuwonetsa chosinthira cha loop feed mu loop system yokhala ndi mwayi wodyetsedwa kuchokera kumodzi mwamagetsi awiri.
Nachi chitsanzo china cha loop feed transformer yoyikidwa mu radial system. Izi zikachitika, nduna yayikulu imakhala ndi ma kondakitala amodzi okha omwe amafika pazitsamba za A-side, ndipo gulu lachiwiri la B-side bushings limathetsedwa ndi zipewa zotsekera kapena zomangira zigongono. Dongosololi ndilabwino pakugwiritsa ntchito kwa radial feed komwe kumafunikira chosinthira chimodzi chokha pakuyika. Kuyika zida zodzitchinjiriza pa B-side bushings ndiyenso kasinthidwe kokhazikika kwa thiransifoma yomaliza mu unyolo kapena magawo angapo a chakudya cha loop (mwachizoloŵezi, chitetezo cha opaleshoni chimayikidwa pagawo lomaliza).
Chithunzi 10: Nachi chitsanzo cha pulayimale ya loop feed yokhala ndi zitsamba zisanu ndi chimodzi pomwe tchire lachiwiri la B-mbali limathetsedwa ndi zomangira zakufa kutsogolo. Kukonzekera uku kumagwira ntchito kwa thiransifoma imodzi yokha, ndipo imagwiritsidwanso ntchito pa thiransifoma yotsiriza pamndandanda wamagulu olumikizidwa.
Ndikothekanso kufananiza masinthidwe awa ndi choyambira chamagulu atatu pogwiritsa ntchito ma feed ozungulira (kapena feedthru). Kulowetsa kulikonse kumakupatsani mwayi woyika chingwe chotsekera chimodzi ndi chomangira chakufa chakutsogolo pagawo lililonse. Kukonzekera kumeneku ndi zoikamo zakudya kumapangitsanso kutera kwa zingwe zina zamakina ogwiritsira ntchito loop system, kapena maulumikizidwe atatu owonjezera atha kugwiritsidwa ntchito kudyetsa mphamvu ku thiransifoma ina pamndandanda (kapena loop) wa mayunitsi. Kudyetsa-kudzera kasinthidwe ndi ma radial transfoma salola kuti pakhale chisankho chosankha pakati pa A-side ndi B-side bushings ndi zosintha zamkati pa transformer, zomwe zimapangitsa kukhala chisankho chosayenera kwa machitidwe a loop. Chigawo choterechi chitha kugwiritsidwa ntchito ngati njira yanthawi yochepa (kapena yobwereketsa) ngati chosinthira cha loop feed sichikupezeka, koma sichoyenera kukhazikika.
Chithunzi 11: Zoyika zozungulira zozungulira zitha kugwiritsidwa ntchito kuwonjezera zomangira kapena zingwe zina zotuluka pakupanga ma radial feed bushing.
Monga tafotokozera poyamba, ma loop feed transformers amagwiritsidwa ntchito kwambiri m'ma radial system chifukwa amatha kupangidwa mosavuta kuti adziyimire okha monga momwe tawonetsera pa Chithunzi 10, koma nthawi zonse amakhala osankhidwa okha pa ma loop systems chifukwa cha ma bushing awo asanu ndi limodzi. kamangidwe. Ndi kuyika kwa ma sector omizidwa ndi mafuta, ma feed angapo amatha kuwongoleredwa kuchokera ku nduna yayikulu ya unit.
Mfundo yokhala ndi masiwichi osankha imaphatikizapo kuswa kuyenda kwamagetsi pamakoyilo a thiransifoma monga chosinthira chosavuta / chozimitsa chokhala ndi kuthekera kowonjezera komwe kumayenda pakati pa A-side ndi B-side bushings. Kusintha kosavuta kwa osankha kuti mumvetsetse ndi njira yosinthira magawo awiri. Monga momwe Chithunzi 12 chikuwonetsera, chosinthira chimodzi chotsegula / chozimitsa chimayang'anira thiransifoma yokha, ndipo zosintha ziwiri zowonjezera zimawongolera A-mbali ndi B-mbali amadyetsa payekhapayekha. Kukonzekera uku ndikwabwino pakukhazikitsa kwa loop system (monga mu Chithunzi 9 pamwambapa) chomwe chimafuna kusankha pakati pa magawo awiri osiyana nthawi iliyonse. Zimagwiranso ntchito bwino pamakina a radial okhala ndi mayunitsi angapo omangidwa pamodzi.
Chithunzi 12:Chitsanzo cha thiransifoma yokhala ndi masiwichi atatu okhala ndi magawo awiri kumbali yoyamba. Kusintha kosankha kotereku kungagwiritsidwenso ntchito ndi chosinthira chimodzi chokhala ndi malo anayi, komabe, njira yamalo anayi sikhala yosunthika, chifukwa siyilola kuyimitsa / kuyimitsa kwa thiransifoma palokha mosasamala kanthu za A-mbali ndi B-mbali chakudya.
Chithunzi 13 chikuwonetsa zosintha zitatu, iliyonse ili ndi masiwichi atatu okhala ndi magawo awiri. Gawo loyamba kumanzere lili ndi masiwichi onse atatu pamalo otsekedwa (pa). Transformer yapakati imakhala ndi masiwichi a mbali ya A-mbali ndi B pamalo otsekedwa, pomwe chosinthira chomwe chimayang'anira koyilo ya thiransifoma chili pamalo otseguka (ozimitsa). Muzochitika izi, mphamvu imaperekedwa ku katundu woperekedwa ndi thiransifoma yoyamba ndi yomaliza mu gulu, koma osati ku gawo lapakati. Munthu wa A-side ndi B-side on / off switches amalola kuti kuyenda kwamakono kupitirire ku gawo lotsatira pamzerewu pamene kusintha kwa / kuzimitsa kwa koyilo ya transformer kutsegulidwa.
Chithunzi 13: Pogwiritsa ntchito masiwichi ambiri osankha pa thiransifoma iliyonse, gawo lomwe lili pakatikati litha kukhala lolekanitsidwa popanda kutaya mphamvu kumayunitsi oyandikana nawo.
Palinso masinthidwe ena otheka, monga masinthidwe anayi-omwe amaphatikiza masiwichi atatu okhala ndi magawo awiri kukhala chida chimodzi (ndi zosiyana zochepa). Masinthidwe anayi amatchulidwanso kuti "loop feed switch" chifukwa amagwiritsidwa ntchito ndi ma loop feed transformers. Kusintha kwa loop feed kutha kugwiritsidwa ntchito pama radial kapena loop system. Mu dongosolo la radial, amagwiritsidwa ntchito kupatulira transformer kuchokera kwa ena mu gulu monga momwe zilili mu Chithunzi 13. Mu ndondomeko ya loop, kusintha kotereku kumagwiritsidwa ntchito nthawi zambiri kulamulira mphamvu kuchokera kumodzi mwa magawo awiri omwe akubwera (monga mu Chithunzi 9).
Kuyang'ana mozama ma switch a loop feed ndikupitilira munkhaniyi, ndipo kufotokozera mwachidule kwa iwo apa kukugwiritsidwa ntchito kuwonetsa gawo lofunikira la masinthidwe osankha amkati omwe amaseweredwa m'ma transfoma a loop feed omwe amayikidwa mu ma radial ndi loop system. Nthawi zambiri pomwe thiransifoma yolowa m'malo imafunikira mu loop feed system, mtundu wakusintha womwe takambirana pamwambapa ufunika. Zosintha zitatu zamitundu iwiri zimapereka kusinthasintha kwambiri, ndipo pachifukwa ichi, ndi njira yabwino yothetsera chosinthira chomwe chimayikidwa mu loop system.
Chidule
Monga lamulo la chala chachikulu, chosinthira chokhala ndi ma radial feed pad nthawi zambiri chimawonetsa ma radial system. Ndi thiransifoma yokhala ndi loop feed pad, zitha kukhala zovuta kutsimikiza za kasinthidwe kadera. Kukhalapo kwa zosintha zamkati zomizidwa ndi mafuta nthawi zambiri kumawonetsa njira ya loop, koma osati nthawi zonse. Monga tafotokozera poyamba, njira zolumikizirana nthawi zambiri zimagwiritsidwa ntchito pomwe kupitiliza ntchito kumafunikira, monga zipatala, ma eyapoti, ndi masukulu aku koleji. Pamakhazikitsidwe ovuta monga awa, kasinthidwe kake kadzafunika nthawi zonse, koma ntchito zambiri zamalonda ndi zamafakitale zimalola kusinthasintha kwina kwa kasinthidwe ka pad-mounted transformer yomwe ikuperekedwa-makamaka ngati dongosololi ndi lowala.
Ngati mwangoyamba kumene kugwira ntchito ndi ma radial ndi loop feed pad-mounted transformer application, tikupangira kuti bukuli likhale lothandizira ngati buku. Tikudziwa kuti sizokwanira, komabe, khalani omasuka kutifunsa ngati muli ndi mafunso owonjezera. Timagwiranso ntchito molimbika kuti zosintha zathu za thiransifoma ndi magawo athu zikhale zodzaza bwino, kotero tidziwitseni ngati muli ndi zomwe mukufuna.
Nthawi yotumiza: Nov-08-2024