Muyeso wa mphamvu yamagetsi ndi voteji ndi ma frequency.Kusagwirizana kwa magetsi kumakhudza kwambiri mphamvu yamagetsi.Kuwonjezeka, kuchepa kapena kutayika kwa gawo lamagetsi kumakhudza magwiridwe antchito otetezeka a zida zamagetsi zamagetsi ndi mtundu wamagetsi ogwiritsa ntchito mosiyanasiyana.Pali zifukwa zambiri za kusalinganika kwa magetsi mu dongosolo la chipukuta misozi.Nkhaniyi ikuwonetsa Zomwe zimayambitsa zisanu ndi chimodzi za kusalinganika kwamagetsi zimawunikidwa mwatsatanetsatane, ndipo zochitika zosiyanasiyana zimawunikidwa ndikuthana nazo.
Mawu ofunikira: voteji yamagetsi;kusalinganika;kusanthula ndi kukonza
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1 Kusintha kwamphamvu kwamagetsi
1.1 The capacitance pansi wa gawo voteji maukonde osagwirizana chifukwa ndi osayenera chipukuta misozi digiri ndi onse arc kupondereza makoyilo mu dongosolo chipukuta misozi kupanga mndandanda resonant dera ndi asymmetric voteji UHC monga magetsi, ndi ndale mfundo kusamutsidwa voteji ndi:
UN=[uo/(P+jd)]·Ux
Mu chilinganizo: uo ndi asymmetry digiri ya maukonde, dongosolo chipukuta misozi digiri: d ndi damping mlingo wa maukonde, amene pafupifupi wofanana 5%;U ndiye gawo lamagetsi lamagetsi.Zitha kuwoneka kuchokera ku ndondomeko yomwe ili pamwambayi kuti digiri ya chipukuta misozi yocheperako, imakhala yokwera kwambiri yamagetsi osalowerera ndale.Kuti ma voltage osalowerera ndale asakhale okwera kwambiri panthawi yogwira ntchito bwino, kubwezeredwa kwa resonance ndi kubweza pafupi ndi resonance kuyenera kupewedwa panthawi yogwira ntchito, koma pazochitika zenizeni, komabe, zimachitika: ① Digiri yamalipiro ndi yaying'ono kwambiri, chifukwa cha capacitor panopa ndi inductance current of the arc suppression coil IL = Uφ/2πfL chifukwa cha kusintha kwa magetsi ogwiritsira ntchito ndi kuzungulira, IC ndi IL zimatha kusintha, motero kusintha digiri yakale ya chipukuta misozi.Dongosolo limayandikira kapena limapanga chipukuta misozi.②Kupereka mphamvu kwa mzere kuyimitsidwa.Wogwiritsa ntchitoyo akasintha koyilo ya arc kupondereza, mwangozi amayika chosinthira pampopi pamalo osayenera, zomwe zimapangitsa kuti pakhale kusalowerera ndale, ndiyeno chodabwitsa cha kusalinganika kwamagetsi.③Mu gridi yamagetsi yolipiridwa pang'ono, nthawi zina chifukwa cha kudumpha kwa mizere, kapena kuzimitsa kwamagetsi chifukwa cha kuchepa kwa mphamvu ndi kukonza, kapena chifukwa cha chingwe chomwe chimayikidwa mu gridi yamagetsi yolipiridwa mopitilira muyeso, padzakhala pafupi kapena kupanga chipukuta misozi, zotsatira zake. osalowerera ndale.Mfundoyi imachotsedwa, ndipo gawo la voltage unbalance limachitika.
1.2 Kusalinganika kwamagetsi komwe kumachitika chifukwa cha kutsekedwa kwa PT pamalo owunikira magetsi Makhalidwe a kusalinganiza kwa magetsi omwe amayamba chifukwa cha PT yachiwiri yowombedwa ndi fuyusi yachiwiri ndikusintha mpeni wosalumikizana bwino kapena kusagwira ntchito kwathunthu ndi;chizindikiro chapansi chingawonekere (PT primary disconnection), kuchititsa Chiwonetsero cha voteji cha gawo lotsekedwa ndi chochepa kwambiri kapena palibe chisonyezero, koma palibe gawo lokwera voteji, ndipo chodabwitsa ichi chimapezeka kokha mu transformer inayake.
1.3 Voltage unbalance compensation chifukwa cha kukhazikitsidwa kwa gawo limodzi la dongosolo Pamene dongosololi liri lachilendo, asymmetry ndi yaing'ono, magetsi si aakulu, ndipo kuthekera kwa gawo lopanda ndale kuli pafupi ndi kuthekera kwa dziko lapansi.Kuyika zitsulo kumapezeka pamalo ena pamzere, mabasi kapena zida zamoyo, kumakhala kofanana ndi pansi, ndipo mtengo wamagetsi wa magawo awiri okhazikika pansi umakwera mpaka voteji ya gawo ndi gawo, kuchititsa kusamuka kwakukulu kwa ndale.Kukaniza kosiyana, ma voltages awiri anthawi zonse amakhala pafupi kapena ofanana ndi ma voltage a mzere, ndipo matalikidwe ndi ofanana.Mayendedwe a voltage point displacement voltage ali pamzere wowongoka womwewo monga mphamvu yamagetsi yapansi panthaka, ndipo mbali yake ndi yotsutsana nayo.Ubale wa phasor ukuwonetsedwa mu Chithunzi 2.
1.4 Kusagwirizana kwa voteji komwe kumachitika chifukwa cha kutha kwa gawo limodzi la mzere kumapangitsa kusintha kwa asymmetric kwa magawo mu netiweki pambuyo pa kutha kwa gawo limodzi, zomwe zimapangitsa kuti asymmetry ichuluke kwambiri, zomwe zimapangitsa kuti voteji yayikulu isamuke pamalo osalowerera ndale. Gulu lamagetsi, zomwe zimapangitsa gawo la magawo atatu a dongosolo.Mphamvu yamagetsi yapansi yosakwanira.Pambuyo pa kutsekedwa kwa gawo limodzi la dongosolo, zomwe zinachitikira m'mbuyomo ndikuti voteji ya gawo losiyidwa imawonjezeka ndipo voteji ya magawo awiriwa imachepa.Komabe, chifukwa cha kusiyana kwa malo a kuchotsedwa kwa gawo limodzi, zochitika zogwirira ntchito ndi zinthu zomwe zimalimbikitsa, mayendedwe ndi kukula kwa voteji yosalowerera ndale ndi chisonyezero cha voteji ya gawo-to-pansi sizili zofanana;Zofanana kapena zofanana, mphamvu yamagetsi yamagetsi pansi pa gawo lotsekedwa imachepa;kapena voteji wa gawo wabwinobwino pansi amachepetsa, ndi voteji wa gawo anakanidwa ndi zina yachibadwa gawo pansi kumawonjezeka koma matalikidwe si ofanana.
1.5 Kusalinganika kwamagetsi komwe kumachitika chifukwa cha kuphatikizika kwamakina ena olipira.Mizere iwiri ya machitidwe awiri operekera malipiro operekera mphamvu ndi pafupi kwambiri ndipo magawo ofanana ndi aatali, kapena pamene kutsegulidwa kwa mtanda kumayikidwa pamtengo womwewo kuti usungidwe, mizere iwiriyi imagwirizanitsidwa mndandanda ndi mphamvu pakati pa mizere yofanana.resonant dera.Kusalinganika kwamagetsi kwapakati pagawo kumachitika.
1.6 Phase voliyumu yosalinganizidwa ndi resonance overvoltage Zinthu zambiri zosagwirizana ndi ma inductive mu gridi yamagetsi, monga ma transfoma, ma electromagnetic voltage transfoma, ndi zina zambiri, ndipo ma capacitive a system amapanga mabwalo ambiri ovuta oscillating.Pamene mabasi opanda kanthu ndi mlandu, gawo lililonse la magetsi voteji thiransifoma ndi capacitance pansi pa maukonde kupanga palokha oscillation dera, zomwe zingachititse awiri gawo voteji kuwonjezeka, gawo limodzi voteji kuchepa kapena zosiyana gawo voteji kusamvana.ferromagnetic resonance iyi, Imangowoneka pa basi imodzi yokha yamagetsi poyitanitsa basi yopanda kanthu kudzera pa thiransifoma ndi gwero lamagetsi lamagetsi ena.Mu dongosolo lomwe lili ndi mulingo wamagetsi, vutoli lilibe pamene basi yachiwiri ya substation imayendetsedwa ndi chingwe chachikulu chotumizira mphamvu.Kuti mupewe mabasi othamangitsa opanda kanthu, mzere wautali uyenera kulipiritsidwa palimodzi.
2 Chiweruzo ndi chithandizo cha kusalinganika kwamagetsi kosiyanasiyana pakugwira ntchito kwamakina
Pamene gawo voteji unbalance kumachitika mu ntchito dongosolo, ambiri a iwo limodzi ndi zizindikiro grounding, koma voteji unbalance si zonse pansi, kotero mzere sayenera kusankhidwa mwachimbulimbuli, ndipo ayenera kusanthula ndi kuweruzidwa kuchokera mbali zotsatirazi:
2.1 Pezani chomwe chimayambitsa kusiyanasiyana kwamagetsi agawo
2.1.1 Ngati kusagwirizana kwa voteji kumakhala kochepa pa malo amodzi owonetsetsa ndipo palibe gawo lokwera mphamvu, zomwe zimapangitsa kuti wogwiritsa ntchito asakhale ndi gawo lotayika, gawo la PT limachotsedwa.Panthawiyi, ingoganizirani ngati chitetezo cha chigawo cha voteji sichikhoza kugwira ntchito ndikukhudza muyeso.Kaya chifukwa cha kusagwirizana ndi chifukwa cha kusagwirizana kwa katundu wa dera lalikulu, zomwe zimatsogolera kuwonetsedwe kosagwirizana, komanso ngati zimayambitsidwa ndi kulephera kwa chinsalu chowonetsera.
2.1.1 Ngati kusagwirizana kwa voteji kumachitika pamalo aliwonse owunikira magetsi munthawi yomweyo, chiwonetsero chamagetsi cha malo aliwonse owunikira chiyenera kufufuzidwa.Magetsi osagwirizana ndi odziwikiratu, ndipo pali magawo ocheperako komanso magawo omwe akuchulukirachulukira, ndipo zisonyezo za gawo lililonse lowunikira ma voltage ndizofanana.Zomwe zimayambitsa mphamvu yamagetsi zitha kukhala zapadera kwambiri monga kusalumikizana bwino kwa thiransifoma ya busbar voltage.N'zothekanso kuti zifukwa zingapo zimasakanizidwa pamodzi.Ngati chifukwa cha zovutazo sichingadziwike, gawo losazolowereka liyenera kuchotsedwa ntchito ndikuperekedwa kwa ogwira ntchito yokonza kuti akonze.Monga dispatcher ndi woyendetsa, ndi wokwanira kudziwa kuti chifukwa cha zachilendo lagona mu busbar voteji kusintha ndi madera otsatirawa, ndi kubwezeretsa dongosolo voteji mwakale.Zifukwa zingakhale:
①Digiri ya chipukuta misozi sizoyenera, kapena kusintha ndikugwiritsa ntchito koyilo ya arc kupondereza ndikolakwika.
②Dongosolo lolipiridwa pang'ono, pali maulendo apangozi amzere okhala ndi magawo ofanana.
③Katundu akatsika, ma frequency ndi magetsi amasintha kwambiri.
4. Pambuyo pa ngozi yosawerengeka monga kukhazikitsa pansi kumachitika muzinthu zina zolipirira, kusamutsidwa kwa ndale kwa dongosolo kumayambitsidwa, ndipo kusagwirizana kwa magetsi chifukwa cha vuto la chipukuta misozi kuyenera kusinthidwa.Digiri yamalipiro iyenera kusinthidwa.
Kwa kusalinganika kwamagetsi komwe kumachitika chifukwa cha kugunda kwa mzere wa gridi yamagetsi pakugwira ntchito kosamalipiridwa, ndikofunikira kuyesa kusintha digiri yamalipiro ndikusintha koyilo ya arc kupondereza.Pamene katundu mu netiweki ali pa ufa, voteji unbalance kumachitika pamene mkombero ndi voteji kuwuka, ndi arc kupondereza koyilo akhoza kusintha pambuyo unbalance kutha mwachibadwa.Monga dispatcher, muyenera kudziwa bwino izi kuti muweruze molondola ndikuthana ndi zovuta zosiyanasiyana zomwe zingachitike mukugwira ntchito.Kuweruza kwa chinthu chimodzi ndikosavuta, ndipo kuweruza ndi kukonza zolakwika zamagetsi zomwe zimachitika chifukwa cha vuto la magawo awiri kapena kupitilira apo ndizovuta kwambiri.Mwachitsanzo, kuyika pansi kwa gawo limodzi kapena resonance nthawi zambiri kumatsagana ndi kuwomba kwamphamvu kwamagetsi komanso kuwomba kwamagetsi otsika.Pamene fuseji yothamanga kwambiri sichikuwombedwa kwathunthu, ngati chizindikiro choyambira chikutumizidwa kapena ayi zimadalira mphamvu yachiwiri ya voteji ya chizindikiro choyambira ndi mlingo wa fuse wowombedwa.Tikayang'ana pa ntchito yeniyeni, pamene magetsi ndi osazolowereka, dera lachiwiri nthawi zambiri limakhala lachilendo.Panthawiyi, kaya mphamvu yamagetsi ndi zizindikiro zoyambira zimatumizidwa kunja, mtengo wamtengo wapatali si waukulu.Ndikofunikira kwambiri kupeza lamulo lofufuza ndikuthana ndi mphamvu zamagetsi.
2.2 Kuweruza chifukwa malinga ndi kukula kwa gawo voteji unbalance.Mwachitsanzo, kwambiri gawo voteji unbalance kumachitika pa gawo lililonse pa ntchito ya dongosolo, kusonyeza kuti pali gawo limodzi grounding kapena limodzi gawo kuchotsedwa mu mzere waukulu mu maukonde, ndipo aliyense voteji polojekiti mfundo ayenera mwamsanga anafufuza.Malinga ndi chiwonetsero chamagetsi cha gawo lililonse, pangani chiweruzo chokwanira.Ngati ndi gawo losavuta la gawo limodzi, mutha kusankha mzerewo kuti mufufuze molingana ndi mndandanda womwe wasankhidwa.Sankhani choyamba kuchokera ku malo opangira magetsi, ndiye kuti, mutasankha thunthu loyambira molingana ndi mfundo ya "muzu woyamba, ndiye nsonga", ndiyeno sankhani gawo loyambira m'magawo.
2.3 Kuwona zifukwa potengera kusintha kwa zida zamakina ① Kusakhazikika kumachitika mu gawo lina la magawo atatu a thiransifoma, ndipo mphamvu yamagetsi ya asymmetric imaperekedwa.② Mzere wotumizira ndi wautali, gawo la kondakitala ndi losafanana, ndipo kutsekeka ndi kutsika kwa magetsi kumakhala kosiyana, zomwe zimapangitsa kuti voteji ikhale yosakwanira pagawo lililonse.③ Mphamvu ndi kuyatsa zimasakanizidwa ndikugawana, ndipo pali katundu wambiri wagawo limodzi, monga zida zapakhomo, ng'anjo zamagetsi, makina owotcherera, ndi zina zambiri, zimakhazikika kwambiri pagawo limodzi kapena ziwiri, zomwe zimapangitsa kugawa mphamvu kwamagetsi pagawo lililonse. gawo, kupangitsa kuti voteji yamagetsi ikhale yosagwirizana.bwino.
Mwachidule, pakugwira ntchito kwa kachitidwe kakang'ono kamene kakukhazikika (kachitidwe kamalipiro) kokhazikitsidwa ndi koyilo ya arc kuponderezana, gawo la voltage unbalance phenomenon limachitika nthawi ndi nthawi, ndipo chifukwa chazifukwa zosiyanasiyana, digiri ndi mawonekedwe a kusagwirizana nawonso. zosiyana.Koma zomwe zikuchitika ndikuti gululi yamagetsi ikugwira ntchito molakwika, ndipo kuwonjezeka, kuchepa kapena kutayika kwa gawo lamagetsi kumakhudza magwiridwe antchito otetezeka a zida zamagetsi zamagetsi ndi kupanga kwa ogwiritsa ntchito mosiyanasiyana.
Nthawi yotumiza: Aug-29-2022