Ulalo wofooka kwambiri muchitetezo cha relay ndi chosinthira mumagetsi amagetsi.Mu voteji loop, n'zosavuta kulephera kugwira ntchito.Transformer mu voteji imagwira ntchito yofunika kwambiri pakugwira bwino ntchito kwamagetsi.Ntchito, ngakhale kuti palibe zipangizo zambiri mu gawo lachiwiri la transformer yamagetsi, ndipo njira yopangira ma waya sizovuta kwambiri, nthawi zonse padzakhala zolakwika zoterozo ndi zina.Zolakwa zomwe zimachitika mu gawo lachiwiri la thiransifoma yamagetsi sizinganyalanyazidwe, ndipo zimatha kuyambitsa zowopsa, monga kusagwira ntchito bwino komanso kukana kwa chipangizo choteteza.Malinga ndi zomwe zidachitika m'mbuyomu, gawo lachiwiri la thiransifoma yamagetsi ikuchitika Zolephera zimawonekera kwambiri m'magawo awa:
1. Njira yokhazikitsira mfundo ya gawo lachiwiri la thiransifoma yamagetsi ndi yosiyana ndi momwe zimakhalira.Dera lachiwiri la thiransifoma yamagetsi siliwonetsa kukhazikika kwachiwiri kapena malo oyambira ambiri.Kukhazikika kwachiwiri kumatchedwanso secondary virtual grounding.Chifukwa chachikulu cha izi ndi kuwonjezera pa vuto la gridi yapansi mu substation, vuto lofunika kwambiri liri mu ndondomeko ya waya.Kuyika kwachiwiri kwa sensa yamagetsi kumapanga magetsi ena pakati pake ndi gridi yapansi.Mpweya uwu umatsimikiziridwa ndi kuchuluka kwa kusalinganika pakati pa ma voltages ndi kukana komwe kumapangidwa ndi kukhudzana wina ndi mzake, ndi voteji yomwe imapangidwa ndi kukhudzana ndi gululi pansi Pa nthawi yomweyo, idzakhalanso yopambana pakati pa voteji ya chipangizo chilichonse chotetezera, zomwe zidzapangitsa kusintha kwa matalikidwe amtundu uliwonse wa voteji ya gawo lililonse ndi kusinthasintha kwa gawo kumlingo wina, zomwe zidzapangitse kuti zigawo za impedance ndi zowongolera ziwonongeke ndikukana kusuntha..
2. Mpweya wa katatu wotseguka wa transformer voteji ndi wachilendo mu loop.Mpweya wa katatu wotseguka wa voltage transformer udzachotsedwa mu loop.Pali zifukwa zamakina.Kuchitika kwa dera lalifupi nthawi imodzi kumakhudzana kwambiri ndi zizolowezi zina za akatswiri amagetsi.Kuti mukwaniritse mtengo wokhazikika wa voliyumu ya zero-sequence, pansi pa chitetezo cha thiransifoma ndi basi yamagetsi, kukana kwapakali pano kwa relay mu voteji ndikofupika.Anthu ena amagwiritsa ntchito njira yopatsirana yaing'ono.Zotsatira zake ndi Izo zidzachepetsa kwambiri kutsekereza zochitika za voltage yotseguka ya delta mu loop.Komabe, pakakhala vuto lokhazikika mkati mwa substation kapena potuluka, voteji ya zero idzakhala yayikulu, ndipo kulepheretsa kwa loop kudzakhala kochepa.Pakalipano idzakhala yokulirapo, ndipo coil ya relay yamakono idzatentha kwambiri, zomwe zidzachititsa kuti kusungunula kuwonongeke, ndiyeno dera lalifupi lidzachitika.Ngati vuto laling'ono likhala kwa nthawi yayitali, ndiye kuti koyiloyo idzayaka.Si zachilendo kuti voltage transformer ithyoke pa koyilo yoyaka.
3. Kutayika kwamagetsi achiwiri kwa ma voliyumu amagetsi Kutayika kwamagetsi achiwiri kwa osintha magetsi ndi vuto lachikale lomwe nthawi zambiri limapezeka m'makina otetezera magetsi.Chifukwa chachikulu cha vutoli ndikuti magwiridwe antchito amitundu yosiyanasiyana ya zida zosweka sizabwino..Ndi kupanda ungwiro kwa njira yachiwiri ya loop.
4. Gwiritsani ntchito njira zoyendera zolondola
4.1 Njira yoyendera motsatizana Njira iyi ndi kugwiritsa ntchito njira zoyendera ndi zowongolera kuti mupeze gwero la vutolo.Zimachitika mwa dongosolo la kuyendera kunja, kuyang'anira kutsekemera, kuyang'anitsitsa mtengo wokhazikika, kuyesa mphamvu zamagetsi, kuyang'anira ntchito zachitetezo, etc. Njirayi imagwiritsidwa ntchito makamaka pakulephera kwa chitetezo cha microcomputer.Ndi ntchito yosamalira ngozi pomwe pali vuto lakuyenda kapena kulingalira.
4.2 Gwiritsani ntchito njira yonse yoyesera Cholinga chachikulu cha njirayi ndikuwunika ngati lingaliro lachidziwitso ndi nthawi yachitetezo cha chipangizocho ndizabwinobwino, ndipo nthawi zambiri zimatha kutenga nthawi yochepa kuti zibwereze zolakwikazo.Ndipo zindikirani chomwe chimayambitsa vutoli, ngati pali vuto, phatikizani njira zina zowunikira.
4.3 Njira yoyendera motsatizana motsatizananitsa Ngati mbiri yoyeserera yachitetezo cha microcomputer relay komanso chojambulira chamagetsi sichingapeze chomwe chimayambitsa ngoziyo pakanthawi kochepa, chidwi chiyenera kuperekedwa ku zotsatira za ngoziyo.Yang'anani kutsogolo kuchokera ku mlingo kupita ku mlingo mpaka chomwe chimayambitsa chitapezeka.Njirayi imagwiritsidwa ntchito nthawi zambiri ngati chitetezo sichikuyenda bwino.
4.4 Gwiritsani ntchito mokwanira zolakwika zomwe zimaperekedwa ndi choyesa chitetezo cha microcomputer, ndipo tsatirani njira zolondola.
(1) Gwiritsani ntchito mokwanira chojambulira cholakwika ndi mbiri yanthawi.Zolemba zochitika, zojambula zojambulira zolakwika, ndi chizindikiro chowonetsera kuwala kwa chipangizo cha microcomputer relay chitetezo tester ndi maziko ofunikira pakuwongolera ngozi.Kupanga ziganizo zolondola potengera mfundo zothandiza ndiye chinsinsi chothetsera vutoli.
(2) Pambuyo pa ngozi zina zotetezera zowonongeka, chifukwa cha kulephera sichingapezeke motsatira malangizo a chizindikiro pamalopo.Kapena palibe chizindikiro chosonyeza pambuyo pa ulendo wodutsa dera, ndipo sizingatheke (kutanthauzira) ngozi yopangidwa ndi anthu kapena ngozi ya zida.Izi nthawi zambiri zimayamba chifukwa chosowa chidwi cha ogwira ntchito, kusachita bwino, ndi zifukwa zina.Ngozi zopangidwa ndi anthu ziyenera kuwonetseredwa moona mtima kuti tipende ndikupewa kuwononga nthawi.
Nthawi yotumiza: Dec-29-2021