UCanwin yiNkampani yeNkampani yoTshintsho lwaMandla kunye noMvelisi woMbane woMbane
Ulwimi
UCanwin yiNkampani yeNkampani yoTshintsho lwaMandla kunye noMvelisi woMbane woMbane
1. Ziziphi iziphumo zamaqela ahlukeneyo oqhagamshelwano ngokusebenza okufanayo kwee-transformers?
Impendulo: Xa iiguquli zamaqela ahlukeneyo oqhagamshelwano zisebenza ngokufanayo, isiphaluka sesibini siya kuvelisa umahluko wombane ngenxa yombane ohlukeneyo wecala lesibini le-transformers Δ U2, kuba umahluko wesigaba esipheleleyo kuqhagamshelwano lwe-transformer luphinda-phindwa lwe-30 ° Δ Ixabiso le-U2 inkulu. Ukuba umahluko we-angle yesigaba secala lesibini le-parallel transformer yi-30 °, Δ Ixabiso le-U2 yi-51.76% yombane olinganisiweyo. Ukuba i-voltage ye-short-circuit Uk ye-transformer yi-5.5%, ukulinganisa kwangoku kunokufikelela kumaxesha angama-4.7 ombane olinganisiweyo, onokutshisa i-transformer.
Umahluko omkhulu wesigaba uvelisa umsinga omkhulu wokulinganisa, ongavumelekanga. Ngoko ke, abaguquli bamaqela ahlukeneyo abakwazi ukusebenza ngokufanayo.
2. Umthamo olinganisiweyo kunye ne-short-circuit voltage of three-phase transformers with the same transformation ratio kunye neqela lokudibanisa ngokulandelanayo:
Emva kokuziqhuba ngokuhambelanayo, umthwalo ngu-550OKVA,
Umbuzo: ① Umthwalo osasazwe yi-transformer nganye?
② Ungakanani ubungakanani bomthwalo uwonke onokuthwala ii-transformer ezintathu ngaphandle kokugcwala?
③ Uthini umyinge wosetyenziso lwesixhobo esipheleleyo somthamo wenguqu?
Phendula
Umlinganiselo wokusasazwa kwe-transformer nganye:
Emva kokuba ziqhutywe ngokuhambelanayo, umthwalo ngu-5500KVA,
Umbuzo: ① Umthwalo osasazwe yi-transformer nganye?
② Ungakanani ubungakanani bomthwalo uwonke onokuthwala ii-transformer ezintathu ngaphandle kokugcwala?
③ Uthini umyinge wosetyenziso lwesixhobo esipheleleyo somthamo wenguqu?
Phendula
3. Yintoni umahluko phakathi kwe-autotransformers kunye neenguqu eziqhelekileyo?
Impendulo: Umahluko phakathi kwe-autotransformer kunye ne-transformer eqhelekileyo yile:
(1) Icala layo eliphambili kunye necala lesibini alidityaniswanga kuphela yimagnetism, kodwa nangombane, ngelixa ii-transformers eziqhelekileyo zixhunywe kuphela yimagnetism.
(2) Umthamo wonikezelo lwamandla ngokusebenzisa i-transformer yenziwe ngamacandelo amabini: amandla okufakelwa kombane we-electromagnetic phakathi kwe-primary winding kunye ne-common mawinging, kunye namandla okuqhuba aqhutywe ngokuthe ngqo kwi-primary winding.
(3) Ekubeni ujiko lwe-autotransformer yenziwe ngokujija okuphambili kunye nokujika okuqhelekileyo, inani lokujiko lokujija okuphambili ngokuhambelanayo lingaphantsi kwenani kunye nokuphakama kwamajiko okujikeleza okuphambili kwe-transformer eqhelekileyo, umsinga wesiqhelo. ukujija kunye nokuvuza okubangelwayo. I-reactance ye-short-circuit ye-X ye-autotransformer yi-(1-1 / K) amaxesha e-short-circuit reactance X ye-transformer eqhelekileyo, kwaye i-K yinguqu yokuguqulwa.
(4) Ukuba i-autotransformer ixhotyiswe nge-winding yesithathu, i-winging yayo yesithathu ithatha umthamo oqhelekileyo wokujikeleza. Ichaphazela imo yokusebenza kunye namandla okutshintshana kwe-autotransformer.
(5) Ngenxa yokuba indawo engathathi hlangothi ye-autotransformer kufuneka isekelwe, ukusetwa kunye nokucwangciswa kokukhusela i-relay kuyinkimbinkimbi.
(6) I-Autotransformer incinci ngobukhulu, ilula ngesisindo, ilungele ukuthutha kunye neendleko eziphantsi.
4. Ziziphi iingxaki ekufuneka ziqwalaselwe ekusebenzeni kwe-autotransformer?
Impendulo: Iingxaki eziza kuqatshelwa ngexesha lokusebenza kwe-autotransformer:
(1) Ekubeni amacala aphambili nawesibini e-autotransformer enoqhagamshelo oluthe ngqo lombane, indawo engathathi hlangothi ye-autotransformer esetyenziswa kwigridi yamandla kufuneka ithembeke kwaye isekelwe ngokuthe ngqo ukuthintela ukunyuka kwamandla ombane kwicala le-low-voltage elibangelwa yinto enye- isigaba sokumisa impazamo kwicala le-voltage ephezulu.
2 Ukunqanda le ngozi, izithinteli zombane kufuneka zifakwe kumacala aphambili kunye nakwesibini.
(3) Ekubeni i-impedance yesiphaluka esifutshane ye-autotransformer incinci kwaye i-current circuit current inkulu kune-transformer eqhelekileyo, kuyimfuneko ukuthatha amanyathelo okunciphisa i-short circuit current xa kuyimfuneko.
(4) Ngexesha lokusebenza, i-current of the common winding iya kubekwa iliso ukuba yenze ibe ngaphantsi komthwalo. Ukuba kuyimfuneko, indlela yokusebenza ye-winding yesithathu inokulungiswa ukuze kwandiswe amandla okutshintshana kwe-autotransformer.
5. Zoba i-autotransformer i-O - Y0 nge-wiring yesithathu / Δ- Umzobo wocingo kunye nomzobo wevector we-12-11
Impendulo:
Umzobo wocingo
Umzobo wevector onokwenzeka
6. Ziziphi iintlobo zolawulo lombane we-transformer? Kutheni kukho iimpompo ze-transformer kwicala le-voltage ephezulu?
Impendulo: Zimbini iindlela zolawulo lwamandla ombane we-transformer: kulawulo lwamandla ombane kunye nolawulo lombane wokuvala umthwalo:
Kulawulo lwamandla ombane kuthetha ukuba i-transformer inokulungelelanisa indawo yayo yempompo ngexesha lokusebenza, ngaloo ndlela itshintsha umlinganiselo we-transformer ukufezekisa injongo yolawulo lombane. Kukho iindlela ezimbini zolawulo lwamandla ombane olawula umbane: ulawulo lombane wesiphelo somgca kunye nolawulo lwamanqaku angathathi hlangothi, oko kukuthi, umahluko phakathi kwempompo ye-transformer kwicala lesiphelo somgca we-voltage ephezulu okanye kwicala elingathathi hlangothi kwindawo ephezulu. -i-voltage ejikelezayo. Ukucofa kwicala elingathathi hlangothi kunokunciphisa inqanaba le-insulation yempompo ye-transformer, enenzuzo ebonakalayo, kodwa ifuna ukuba indawo engathathi hlangothi ye-transformer kufuneka isekelwe ngokuthe ngqo ngexesha lokusebenza.
Akukho lawulo lombane womthwalo obhekiselele ekulawuleni indawo yempompo yesiguquli kwimeko yokusilela kwamandla kunye nokugcinwa, ukuze kutshintshwe umlinganiselo we-transformer ukufezekisa injongo yolawulo lombane.
Itephu ye-transformer ithathwa ngokubanzi kwicala le-voltage ephezulu, eqwalasela ikakhulu:
(1) I-high-voltage winding ye-transformer ngokubanzi ingaphandle, kwaye i-tap lead out connection ilungile;
(2) Umsinga kwicala le-high-voltage lincinci, kwaye icandelo lomqhubi wecandelo langoku eliphetheyo lomgca ophumayo kunye nomtshintshi wempompo uncinci. Impembelelo yoqhagamshelwano olubi lunokulungiswa lula.
Ngokomgaqo, impompo inokufumaneka kulo naliphi na icala, kwaye uthelekiso lwezoqoqosho kunye nobugcisa luya kwenziwa. Umzekelo, impompo ye-500kV yesiguquli sokuhla esikhulu sitsalwa kwicala le-220kV, ngelixa icala le-500kV lizinzile.
7. Yintoni i-transformer overexcitation? Yenzeka njani i-overexcitation ye-transformer?
Impendulo: Xa i-voltage ye-transformer inyuka okanye i-frequency iyancipha, ubuninzi bokusebenza kwamagnetic kuya kwanda. Ukuzaliswa kwe-core transformer kubizwa ngokuba yi-transformer overexcitation.
Emva kokuba inkqubo yamandla iqhawulwe ngenxa yengozi, ukugatywa komthwalo ogqithisiweyo, i-ferromagnetic resonance overvoltage, ukulungiswa okungafanelekanga koqhagamshelo lwempompo ye-transformer, akukho mthwalo we-transformer ekupheleni komgca omde okanye enye i-misoperation, ukunyuka kwangaphambili kwe-excitation yangoku phambi kwejeneretha. I-frequency ifikelela kwixabiso elilinganisiweyo, ukuzivuselela kwejenereyitha, kunye nezinye iimeko zezinye iinkqubo zinokuvelisa amandla ombane aphezulu ukuze kubangele ukugqithiswa kwe-transformer.
8. Ziziphi iziphumo ezinokuthi zenzeke kwi-transformer overexcitation? Indlela yokuphepha ngayo?
Impendulo: Xa i-voltage ye-transformer idlula i-10% ye-voltage elinganisiweyo, i-core transformer iya kuhluthwa kwaye ilahleko yentsimbi iya kwanda. Ukuvuza kweMagnetic kwandisa ilahleko yangoku ye-eddy yamacandelo esinyithi njengeqokobhe lebhokisi, okubangela ukufudumeza kwe-transformer, ukuguga kwe-insulation, kuchaphazela ubomi benkonzo ye-transformer kunye nokutshisa i-transformer.
Ukuphepha:
(1) Thintela ukusebenza ngamandla ombane agqithisileyo. Ngokubanzi, okukhona umbane uphezulu, kokukhona unxunguphalo luba lukhulu, kwaye kokukhona lifutshane ixesha elivumelekileyo lokusebenza.
(2) Yongeza ukukhuselwa kwe-overexcitation: thumela isignali ye-alamu okanye unqumle i-transformer ngokuhambelana ne-curve ye-transformer ye-curve kunye nokuphindaphinda okuvumelekileyo okuvumelekileyo.
9. Ziziphi iindawo zokukhusela ezikhuselekileyo ezibonelelwa kwisakhiwo somzimba we-transformer? Ngowuphi owona msebenzi wayo ophambili?
Impendulo: Izibonelelo zokukhusela kwisakhiwo somzimba we-transformer ziquka:
(1) Umlondolozi
Umthamo wayo umalunga ne-8-10% yeoli ye-transformer. Umsebenzi wayo kukulungiselela ukutshintshwa kwevolumu yeoli ye-transformer ngenxa yokutshintsha kweqondo lokushisa, ukunciphisa uqhagamshelwano phakathi kweoli ye-transformer kunye nomoya, kunye nokunciphisa iqondo lokufuma kweoli kunye ne-oxidation. I-absorber yomswakama ifakwe kwi-conservator ukukhusela umoya ukuba ungangeni kwi-transformer.
(2) Isibambisi sokufuma kunye nesicoci seoli
I-absorbent yokufuma, eyaziwa ngokuba yi-respirator, igcwele i-adsorbent, eyi-silica gel yohlobo lwe-alumina esebenzayo. Inxalenye yejeli ye-silica eguquguqukayo ihlala ifakwa kuyo. Xa i-blue blue ijika ibomvu, ibonisa ukuba i-adsorbent iye yachaphazeleka ngomswakama kwaye kufuneka yomiswe okanye ithathelwe indawo.
Isicoci se-oyile sikwabizwa ngokuba sisihluzo. I-cylinder yeoli ecocekileyo igcwele i-adsorbent, eyi-silica gel esebenzayo i-alumina. Xa ioli idlula kwi-oyile yokucoca i-oyile kwaye idibanisa i-adsorbent, amanzi, i-asidi kunye ne-oxide kwi-oyile yokucoca i-oyile iyaxutywa, eyenza ioli ihlambuluke kwaye ikhulise ubomi benkonzo yeoli.
(3) Umbhobho ongagqabhukiyo (umoya wokhuseleko)
Umbhobho wokutshatyalaliswa kokuqhuma ufakwe kwi-cover ye-tank ye-transformer njengento yokukhusela ekukhuseleni uxinzelelo oluphezulu kwitanki yeoli xa kwenzeka ukungaphumeleli kwangaphakathi kwe-transformer.
Ivalve yokukhulula uxinzelelo isetyenziswe kwiinguqu ezinkulu zanamhlanje zokutshintsha indawo yokhuseleko lomoya. Xa uxinzelelo lwangaphakathi lwe-transformer luphakama, i-valve yokunciphisa uxinzelelo iyasebenza kunye nabafowunelwa baxhunyiwe kwi-alamu okanye ukukhubeka.
Ukongeza, i-transformer nayo inokukhusela igesi, i-thermometer, imitha yeoli kunye nezinye izixhobo zokukhusela ukhuseleko.
10. Uthini umahluko phakathi kwe-voltage transformer kunye ne-transformer yangoku kwimigaqo yabo yokusebenza?
Impendulo: I-voltage transformer isetyenziselwa ukulinganisa i-voltage, ngelixa i-transformer yangoku isetyenziselwa ukulinganisa okwangoku.
(1) Icala lesibini le-transformer yangoku linokuba lifutshane, kodwa alikwazi ukujikeleza ngokuvulekileyo; Icala lesibini le-voltage transformer linokuba yisekethe evulekileyo, kodwa hayi isiphaluka esifutshane.
(2) Xa kuthelekiswa nomthwalo kwicala lesibini, i-impedance yangaphakathi ephambili ye-voltage transformer incinci kangangokuba ayinakuhoywa, kwaye i-voltage transformer inokuthathwa njengomthombo wombane; Ukuxhatshazwa okuphambili kwangaphakathi kwe-transformer yangoku kukhulu kangangokuba kuthathwa njengomthombo wangoku kunye nokuchasana okungapheliyo kwangaphakathi.
(3) Xa i-voltage transformer isebenza ngokuqhelekileyo, i-magnetic flux density isondele kwixabiso le-saturation, kwaye i-voltage yehla xa inkqubo ingaphumeleli; Ubuninzi be-magnetic flux buyancipha, kwaye i-magnetic flux density iphantsi kakhulu xa i-transformer yangoku isebenza ngokuqhelekileyo. Xa inkqubo imfutshane, i-current in the primary side inyuka, eyandisa kakhulu i-magnetic flux density, kwaye ngamanye amaxesha ide igqithe ixabiso lokuzalisa, okubangela ukwanda kwempazamo yesiphumo sesibini sangoku. Ngoko ke, zama ukukhetha i-transformer yangoku ekungekho lula ukuyihlutha.
QHAGAMSHELANA US
Thatha ithuba lolwazi lwethu kunye namava angenakuthelekiswa nanto, sikunika eyona nkonzo ilungileyo yokwenza ngokwezifiso.
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SHIYA UMYALEZO
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