Uvavanyo lweTransformer olungenamthwalo/umthwalo Intshayelelo

Uvavanyo lwe-short-circuit: zenze i-short-circuit kwicala le-low-voltage kunye ne-high-current ye-transformer, kwaye zidlulise i-voltage yovavanyo ye-frequency elinganisiweyo ukusuka kwi-rating tap ye-coil kwicala le-high-voltage ukuze i-current ekwi-winding ifikelele kwixabiso elilinganisiweyo, uze ulinganise amandla okufaka kunye ne-voltage esetyenzisiweyo (oko kukuthi, i-short-circuit loss kunye ne-short-circuit voltage) kunye nexabiso langoku. Ngokwesiqhelo amandla ombane wovavanyo kufuneka abe yi-30% yamandla emveliso evavanyiweyo.

Impedance yolandelelwano lwe-Zero: Impedance eqatshelwa yi-transformer kulandelelwano ngalunye lwesigaba (i-positive, negative, zero) kunye ne-current ibizwa ngokuba yi-sequence impedance, kwaye ziyi-positive sequence, i-negative sequence kunye ne-zero sequence impedance ngokulandelelana. I-positive sequence impedance yi-impedance eboniswa ngexesha lokusebenza okuqhelekileyo. Xa inkqubo isebenza ngokungalinganiyo, kuya kuveliswa i-zero sequence current. I-positive sequence impedance ye-transformer ilingana ne-negative sequence impedance, kwaye ilingana ne-short-circuit impedance ye-transformer. Kwi-zero-sequence impedance, kuba nangaliphi na ixesha, ubukhulu kunye nolwalathiso lwe-zero-sequence currents yazo zonke izigaba ezintathu ziyafana, oko kukuthi, i-sum yazo ayilingani ne-zero, ngoko i-zero-sequence impedance inxulumene ngokuyintloko ne-positive-sequence impedance kunye ne-negative-sequence impedance. Umahluko kukuba ubungakanani bayo abuhambelani kuphela nendlela yokudibanisa i-winding, kodwa nakwisakhiwo se-iron core. Ke ngoko, i-zero-sequence impedance kufuneka imiselwe ngokulinganisa kwangempela.

Indlela yoVavanyo

⑴ Uvavanyo lokungasebenzisi umthwalo olusebenzisa isigaba esinye

Izinto zovavanyo ezingenamthwalo zesigaba esinye zihlala zisetyenziselwa ukuvavanya ipesenti yangoku yokulahleka komthwalo kunye nepesenti yangoku engenamthwalo yeetransformer zesigaba esinye. Ingasetyenziselwa novavanyo lwesigaba ngesigaba lweetransformer zesigaba sesithathu (ngokuyintloko isetyenziselwa ukufumanisa ukuba itransformer evavanywayo ineziphene zesigaba esinye). Le ndlela yovavanyo ikwafuneka xa kungekho mbane wesigaba sesithathu kwindawo leyo.

Uvavanyo lwe-single-phase no-load olusebenzisa i-voltage ye-A-phase kunye ne-A-phase current yesixhobo. Njengoko kubonisiwe kumfanekiso, sebenzisa umbane we-single-phase njengombane wovavanyo, i-live wire iqhagamshelwe kwi-positive terminal ye-A-phase current terminal ye-tester, i-thick yellow wire iqhagamshelwe kwi-negative terminal ye-A-phase current terminal, kwaye i-thin wire iqhagamshelwe kwi-A-phase voltage terminal Ua, Umgca ongqindilili wee-red pliers uqhagamshelwe ngqo kumgca we-zero wombane wovavanyo, umgca ongqindilili uqhagamshelwe kwi-B-phase voltage terminal Ub, kwaye ii-pliers ezimbini zibotshelelwe ngokulandelelana kwii-terminals ezimbini kwicala le-low-voltage. Icala le-high voltage livulekile.

Le ndlela ikwafanelekile ekulinganisweni kokulahlekelwa ngumthwalo kwiitransformer zesigaba sesithathu ezinamandla esigaba esinye. Xa kufunyaniswa ukuba ilahleko idlula umgangatho emva kovavanyo lwesigaba sesithathu lokungabikho komthwalo, ilahleko yesigaba sesithathu kufuneka ilinganiswe ngokwahlukeneyo. Ngokuhlalutya nokuthelekisa ilahleko yokungabikho komthwalo yesigaba ngasinye, ukusasazwa kwelahleko yokungabikho komthwalo kwisigaba ngasinye kunokujongwa ukujonga isekethe yokujika okanye yemagnethi yesigaba ngasinye. kunye okanye ngaphandle kweziphene zasekuhlaleni. Ukujika kwesigaba esinye sesekethe esifutshane sesigaba esinye setransformer ngokutshintshiselana, sebenzisa i-voltage kwezinye iiwindings zesigaba sesibini, kwaye ulinganise ilahleko yokungabikho komthwalo kunye nomsinga womthwalo. Umzobo wocingo uboniswe kumfanekiso, ngokwendlela yoqhagamshelo lokujika lwetransformer evavanywayo, indlela yokucinezela ingahlulwa ibe ziimeko ezintathu njengoko kubonisiwe kumfanekiso ongezantsi.

a. Ukujija okucinezelweyo kuqhagamshelwe △

Ngexesha lokulinganisa, cinezela izigaba ze-ab, i-bc, kunye ne-ca ngokulandelelana, kwaye ukhawulezise ukujikeleza ii-windings ezingacinezelwanga. Ilahleko elinganisiweyo ibalwa ngokwefomula elandelayo:

Qaphela: Kwifomula, u-In ngumbane olinganisiweyo wekhoyili yovavanyo

b. I-pressurized winding iqhagamshelwe kwi-Y kwaye ine-neutral point lead out:

Xa kulinganiswa, ukujija okungenaxinzelelo kuyacuthwa; i-voltage esetyenzisiweyo iphindwe kabini kune-voltage yesigaba, isiphumo sokulahleka sibalwa ngokwefomula 1, kwaye isiphumo sangoku esingenamthwalo sihambelana nefomula 2 (0.289 kwifomula itshintshelwe kwi-0.333).

c. Ukujija okuxinzelelweyo kuqhagamshelwe ku-Y, kwaye akukho ndawo ingathathi cala itsalwayo:

Xa ukujija okungenaxinzelelo kungenakujija ngokukhawuleza kuba indawo engathathi cala ayitsalwanga, isigaba esihambelanayo sokujija kwesibini kufuneka sijijeke ngokukhawuleza ngexesha lokulinganisa; i-voltage esetyenzisiweyo kufuneka ibe kabini kune-voltage yesigaba.

⑵ Uvavanyo olungenamthwalo olunezigaba ezintathu

Ucingo njengoko kubonisiwe

Sebenzisa i-voltage regulator yezigaba ezintathu njengombane wovavanyo, qhagamshela isiphelo sokukhupha somlawuli we-voltage kwisiphelo esihle se-current terminal ye-capacity tester; iingcingo ezinkulu zee-test clamps ezintathu ziqhagamshelwe kwisiphelo esibi se-current terminal ye-tester ngokwemibala; Iingcingo ezincinci zee-pliers zovavanyo ezintathu ziqhagamshelwe kwi-voltage terminals ye-tester ngokwemibala yazo. Emva koko faka ii-test clamps ezintathu kwi-low-voltage side terminal ye-transformer ephantsi kovavanyo. I-clamp emthubi iqhagamshelwe kwikholamu ye-A-phase, i-clamp eluhlaza iqhagamshelwe kwikholamu ye-B-phase, kwaye i-clamp ebomvu iqhagamshelwe kwikholamu ye-C-phase. Icala le-voltage ephezulu livulekile.

(3) Uvavanyo lwesekethe emfutshane yesigaba esinye

Izinto zovavanyo lwe-short-circuit yesigaba esinye zihlala zisetyenziselwa ukuvavanya ukulahleka kwe-short-circuit kunye ne-impedance voltage yee-transformers zesigaba esinye. Ukongeza, xa kuvavanywa i-transformer yesigaba sesithathu, xa kungekho mbane wesigaba sesithathu okanye amandla ombane mancinci, kwaye xa kufuneka uvavanyo lwesigaba ngesigaba ukuze kuchongwe isigaba esingalunganga ngexesha lenkqubo yokuvelisa okanye ukusebenza, kufuneka nendlela yovavanyo lwe-short-circuit yesigaba esinye; ukufakelwa kweentambo ngokwendlela eboniswe kumfanekiso:

Sebenzisa umbane wesigaba esinye njengombane wovavanyo, ucingo oluphilayo luqhagamshelwe kwisiphelo esihle sesiphelo samandla sesigaba se-A somvavanyi, ucingo olutyheli olutyebileyo luqhagamshelwe kwisiphelo esibi sesiphelo samandla sesigaba se-A, ucingo olubhityileyo luqhagamshelwe kwisiphelo samandla sesigaba se-A sombane, kwaye ucingo olubomvu olutyebileyo luqhagamshelwe kwisiphelo samandla sesigaba se-A. Qhagamshelwa ngqo kumgca ongu-zero wombane wovavanyo, qhagamshela umgca obhityileyo kwisiphelo samandla sesigaba se-B sombane i-Ub, kwaye ubambe iipliers ezimbini kwiisiphelo ezibini kwicala le-voltage ephantsi. Icala le-voltage ephezulu lifutshane ngentambo ekhethekileyo ye-short-circuit. Qaphela ukuba i-short-circuit kufuneka ibe ntle, kungenjalo idatha yovavanyo iya kuchaphazeleka.

Indlela yokwenza uvavanyo lwe-short-circuit lwesigaba ngesigaba kwi-transformer yesigaba sesithathu enombane wesigaba esinye kukujikeleza i-short-circuit kwi-terminals eziphumayo ze-low-voltage zesigaba sesithathu ze-transformer, kwaye wenze imilinganiselo emithathu kwicala le-high-voltage. Ngokwendlela yokudibanisa i-winding ye-transformer ephantsi kovavanyo, inokwahlulwa ibe ziimeko ezimbini ezilandelayo. , bona a, b.

a. Ukujija okucinezelweyo kuqhagamshelwe △

Icala elinoxinzelelo oluphezulu lixinezelekile, kwaye isiphelo sokukhupha esinezigaba ezintathu secala elingaxinezelekanga (icala elinoxinzelelo oluphantsi) kufuneka sidityaniswe ngesandla. Umbane okwi-winding kufuneka ube ngu-2/picture ngokuphindwe kabini kunombane olinganisiweyo, kwaye ixabiso elilinganisiweyo linokuguqulwa libe yilahleko yezigaba ezintathu ze-short-circuit kunye ne-short-circuit voltage ngokwendlela elandelayo:

Qaphela: apho i-Un yi-voltage elinganisiweyo yecala elixinzelelweyo

b. Ukujija okucinezelweyo kuqhagamshelwe ku-Y

Cinezela phakathi kwezigaba ezibini ngokulandelelana, kwaye kwangaxeshanye, isiphelo sendawo yokuphuma esinezigaba ezintathu secala elingacinezelwanga siqhagamshelwe ngesandla.

Qaphela: apho i-Un yi-voltage elinganisiweyo yecala elixinzelelweyo

⑷ Uvavanyo lwesekethe emfutshane olunezigaba ezintathu

Ucingo njengoko kubonisiwe kumfanekiso:

Qaphela: Ukuba i-bushing esecaleni ye-outlet ene-voltage ephezulu okanye ephakathi ixhotyiswe nge-ring current transformer, i-secondary ye-current transformer kufuneka i-short-circuit ngaphambi kovavanyo.

Sebenzisa i-voltage regulator yezigaba ezintathu njengombane wovavanyo, qhagamshela isiphelo sokukhupha somlawuli we-voltage kwisiphelo esihle se-current terminal ye-capacity tester; iingcingo ezinde zee-clamps zovavanyo ezintathu ziqhagamshelwe kwisiphelo esibi se-current terminal ye-tester ngokwemibala; Iingcingo ezibhityileyo zee-pliers zovavanyo ezintathu ziqhagamshelwe kwi-voltage terminals ye-tester ngokwemibala yazo. Emva koko qhagamshela ii-clamps zovavanyo ezintathu kwi-high-voltage side terminal ye-transformer ephantsi kovavanyo. I-clamp etyheli iqhagamshelwe kwikholamu ye-A-phase, i-clamp eluhlaza iqhagamshelwe kwikholamu ye-B-phase, kwaye i-clamp ebomvu iqhagamshelwe kwikholamu ye-C-phase. Emva koko sebenzisa i-short-circuit ekhethekileyo ukuze ukhawulezise ii-terminals ezintathu kwicala le-low-voltage. Qaphela ukuba i-short-circuit kufuneka iqhagamshelwe kakuhle, kungenjalo idatha yovavanyo iya kuchaphazeleka.

⑸ Uvavanyo lwe-Zero-sequence impedance

I-impedance eboniswa yi-zero-sequence voltage kunye ne-zero-sequence current ye-transformer ibizwa ngokuba yi-zero-sequence impedance. Xa inkqubo isebenza ngokungalinganiyo, i-zero-sequence current iya kuveliswa. Ubungakanani bayo abuhambelani nje kuphela nendlela ezidityaniswe ngayo ii-windings, kodwa nakwisakhiwo esiphambili.

Kwimilinganiselo ye-transformer ye-zero-sequence impedance, ucingo njengoko kubonisiwe kumfanekiso:

Sebenzisa umlawuli wevolthi yesigaba esinye njengombane wovavanyo, qhagamshela isiphelo esinye sokukhupha somlawuli wevolthi kwisiphelo esihle sesiphelo sangoku sesigaba se-A somvavanyi wokulahleka, kunye nesiphelo esinye sokukhupha kwisiphelo esibi sesiphelo sangoku sesigaba se-C somvavanyi; uvavanyo olutyheli Ucingo olutyebileyo lweclamp luqhagamshelwe kwisiphelo esibi sesiphelo sangoku sesigaba se-A somvavanyi, kwaye ucingo lovavanyo lwevolthi luqhagamshelwe kwisiphelo samandla sesigaba se-A; ucingo olutyebileyo lweclamp yovavanyo olubomvu luqhagamshelwe kwisiphelo esibi sesiphelo samandla sesigaba se-C somvavanyi (oko kukuthi, ngomlawuli wevolthi Iziphumo ziqhagamshelwe kunye), kwaye ucingo olubhityileyo luqhagamshelwe kwisiphelo samandla sesigaba se-B somvavanyi. Emva koko qhagamshela iiterminal zesigaba se-A, B, kunye nesigaba se-C zendlela yocingo lwecala le-Yn yetransformer ephantsi kovavanyo kunye, kwaye uqhagamshele iclamp yovavanyo etyheli; isiphelo sesigaba se-0 siqhagamshelwe kwiclamp yovavanyo olubomvu. Qaphela ukuba kufuneka sifinyezwe kakuhle, kungenjalo kuya kuchaphazela idatha yovavanyo.

Amanyathelo ovavanyo

1) Amanyathelo ovavanyo lokulahleka komthwalo anezigaba ezintathu, i-transformer yokulinganisa amandla engenamthwalo,

A. Beka kuqala iiparameter zovavanyo;

B. Qhagamshela iingcingo zovavanyo ngokwedayagram yovavanyo lwesekethe emfutshane yezigaba ezintathu;

C. Yenza uvavanyo lwe-short-circuit olunezigaba ezintathu kwaye utshixe idatha yovavanyo;

D. Qhagamshela iingcingo zovavanyo ngokwedayagram yovavanyo olungenamthwalo enamabakala amathathu;

E. Yenza uvavanyo lwezigaba ezintathu olungenamthwalo kwaye utshixe idatha yovavanyo;

F. Ngena kwisikrini seziphumo zovavanyo ukuze ubone yonke idatha;

G. Gcina iirekhodi zovavanyo.

2) Amanyathelo ovavanyo lokulahleka komthwalo wesigaba esinye, umlinganiselo wamandla we-transformer ongenamthwalo,

A. Beka kuqala iiparameter zovavanyo;

B. Qhagamshela ucingo lovavanyo ngokwedayagram yovavanyo lwesekethe emfutshane yesigaba esinye;

C. Yenza uvavanyo lwe-short-circuit lwesigaba esinye;

D. Bhala phantsi iziphumo zovavanyo lwesekethe emfutshane

E. Qhagamshela ucingo lovavanyo ngokwedayagram yovavanyo olungenamthwalo yesigaba esinye;

F. Yenza uvavanyo lokungasebenzisi umthwalo lwesigaba esinye;

G. Bhala phantsi iziphumo zovavanyo lokungasebenzisi umthwalo

Ukulumkela

1. Qiniseka ukuba awuzichukumisi iindawo zesinyithi zeentambo zovavanyo ngexesha lokulinganisa ukuze uphephe ukutshayiswa ngumbane.

2. Iingcingo zokulinganisa kufuneka zisetyenziswe ngokuhambelana nemiyalelo, kungenjalo iziphumo ziya kuba semngciphekweni wakho.

3. Ngaphambi kokuvavanya, qiniseka ukuba ujonga ngononophelo ukuba iiparameter ezibekiweyo zichanekile na.

4. Kungcono ukusebenzisa iplagi yombane enocingo oluphantsi komhlaba.

5. Ayikwazi ukusebenza phantsi kwemida engaphezulu kwe-voltage kunye ne-current.

6. Ngexesha lovavanyo lwe-short-circuit, i-short-circuit kwicala elingacinezelwanga kufuneka ibe ntle, kungenjalo iya kuchaphazela iziphumo zovavanyo.

7. Ngexesha lovavanyo lwe-short-circuit, ukuba i-high-voltage okanye i-medium-voltage side outlet bushing ifakwe i-toroidal current transformer, i-secondary ye-current transformer kufuneka i-short-circuit ngaphambi kovavanyo.

8. Umsebenzi wocingo lovavanyo kufuneka wenziwe phantsi komqathango wokuba isekethe evavanyiweyo isekelwe ukuthintela ukutshayiswa kombane kwi-voltage ebangelwayo. Zonke iishothi, ii-grounds kunye nee-leads kufuneka zibe ne-cross-section eyaneleyo kwaye kufuneka ziqhagamshelwe ngokukhuselekileyo. Ulungiselelo lovavanyo kufuneka lube ngqongqo kwaye unxibelelwano kufuneka lube bushelelezi ukuqinisekisa inkqubela phambili ekhuselekileyo nethambileyo yomsebenzi wovavanyo.

Intshayelelo yesixhobo:

Umvavanyi weempawu zomthwalo we-transformer ongenamthwalo sisixhobo esichanekileyo kakhulu esakhiwe ngokukodwa kwaye saphuhliswa yinkampani yethu sokulinganisa iiparamitha ze-transformer ezingenamthwalo, iiparamitha zomthwalo kunye neeparamitha ze-zero-sequence impedance. Ingalinganisa ngokuchanekileyo uthotho lweeparamitha ezifana nombane ongenamthwalo, ukulahleka komthwalo, ukulahleka kwesekethe emfutshane, i-impedance voltage, umxholo we-harmonic, kunye nesantya sokuphambuka kwee-transformers ezahlukeneyo. Esi sixhobo sineenzuzo zobukhulu obuncinci, ubunzima obulula, ukuchaneka kokulinganisa okuphezulu, uzinzo oluhle, ukusebenza okulula kunye nokufunda okulula, njl. Ingatshintsha ngokupheleleyo indlela yangaphambili yokulinganisa ukulahleka kwe-transformer kunye nomthamo ngokusebenzisa indlela ye-multi-meter, ngocingo olulula, uvavanyo olulula kunye nokurekhoda, kunye nokusebenza kakuhle komsebenzi okuphuculweyo kakhulu. Isebenzisa i-LCD yombala wokwenyani wesikrini esikhulu njengefestile yokubonisa, ukusebenza kwemenyu yemizobo kwaye ixhotyiswe ngeempawu zesiTshayina, ujongano lokubonisa oludibanisa iiparamitha ezininzi kwisikrini esinye, ujongano lonxibelelwano olunobuhlobo phakathi komntu nomatshini, kulula kwaye kuyakhawuleza ukuyisebenzisa, kwaye lukhetho oluhle kakhulu kubasebenzisi bamandla kuwo onke amanqanaba. Imveliso ekhethwayo.

Iimpawu zesixhobo:

1. Ingalinganisa umbane ongenamthwalo, ukulahleka komthwalo, i-impedance voltage, ukulahleka komthwalo kunye ne-zero-sequence impedance yeentlobo ezahlukeneyo zeetransformer.

2. Ingenza ngokuzenzekelayo ukulungiswa kokugqwetheka kwesimo samaza, ukulungiswa kobushushu (ukubonelela ngokulungiswa okulula kobushushu kunye nokulungiswa kokulahleka okongezelelweyo ngokulandelelanayo), ukulungiswa kwevolthi (uvavanyo olungenamthwalo phantsi kwevolthi engalinganiswanga), ukulungiswa kwangoku (uvavanyo lwesekethe emfutshane phantsi kweemeko zangoku ezingalinganiswanga)), ifanelekile kakhulu kwiiyunithi ezingenazo iimeko zovavanyo lwesekethe emfutshane kwiitransformer ezinomthamo omkhulu kancinci.

3. Ingalinganisa i-voltage yesigaba sesithathu, i-current yesigaba sesithathu, i-voltage ephakathi, i-current ephakathi, i-power esebenzayo yesigaba sesibini (kuba indlela yemitha yamandla amabini iyasetyenziswa, kuphela amandla esigaba sesibini u-A no-C aboniswa apha), kunye namandla apheleleyo. 4, Ingalinganisa umxholo we-harmonic we-2-42 we-voltage yesigaba ngasinye kunye ne-current kunye nesantya sokuphambuka okupheleleyo (ukuphambuka kwe-harmonic) kwesignali nganye.

5. Ingabonisa imo ye-waveform yexesha langempela ye-voltage yesigaba ngasinye kunye nomsinga, kwaye ibonise ngokubonakalayo ukugqwetheka kwemo ye-waveform.

6. Ububanzi be-voltage loop: i-voltage ingalinganiswa ukuya kuthi ga kwi-750V, kwaye ukuchaneka kwayo kungaqinisekiswa ngaphandle kokutshintsha iigiya. Isixhobo ngokwaso asiyi konakala ngenxa yokukhetha gwenxa iigiya ze-voltage.

7. Isikrini esikhulu, imenyu epheleleyo yabalinganiswa baseTshayina kunye nemiyalelo yokusebenza yenza incoko yobuhlobo phakathi komntu nomatshini, amaqhosha erabha aqhubayo enza kube lula ukusebenza, kunye nokukhanya okuphezulu kunye nomboniso we-LCD onombala wokwenyani unokuziqhelanisa nexesha lasebusika nelasehlotyeni.

8. Umsebenzisi angaprinta idatha yovavanyo ngeprinta encinci nangaliphi na ixesha.

9. Zonke iziphumo zovavanyo zingagcinwa ngendlela yeerekhodi ukuze zisetyenziswe kwixesha elizayo.

10. Iwotshi yokwenyani eyakhelwe ngaphakathi ingabonisa umhla nexesha langoku ngexesha langempela, kwaye ixesha lovavanyo lingagcinwa ngexesha elinye xa irekhodi ligcinwa.

Iiparameter zezixhobo:

1. Iimpawu zokufaka

Uluhlu lokulinganisa iVolthi: umda obanzi we-0~750V.

Uluhlu lokulinganisa lwangoku: 0~5~100A, zonke iireyithingi zangaphakathi zitshintshwa ngokuzenzekelayo.

2. Ukuchaneka

I-Voltage: ± 0.2%

Okwangoku: ± 0.2% yoluhlu

Amandla: ±0.5% (CosΦ>0.1), ±1.0% (0.05

3. Ubushushu bokusebenza

Ubushushu bokusebenza: -10℃ ~ +40℃

4. Amandla okusebenza

Amandla okusebenza: AC 160V ~ 265V

5. Ukuvala ubushushu

(1) Ukumelana nobushushu bee-voltage kunye nee-current input terminals kwi-chassis kungaphezulu okanye kulingane ne-100MΩ.

(2) Isantya samandla yi-2KV (ixabiso elisebenzayo) phakathi kwesiphelo sokufaka sombane osebenzayo kunye nebhokisi, kwaye uvavanyo luthathe umzuzu omnye.

6. Umthamo: 32cm×24cm×13cm

7. Ubunzima: 3Kg

Umfanekiso wesixhobo: