UCanwin yiNkampani yeNkampani yoTshintsho lwaMandla kunye noMvelisi woMbane woMbane
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UCanwin yiNkampani yeNkampani yoTshintsho lwaMandla kunye noMvelisi woMbane woMbane
Izixhobo ezihambelanayo zokukhusela ziya kufakwa kwiimpazamo ze-short-circuit ye-transformer lead ingcingo, i-bushings kunye ne-internals, kwaye iya kuhlangabezana nezi mfuno zilandelayo:
I-1) I-transformer ehambayo enye ye-10MVA nangaphezulu kunye ne-parallel running transformer ye-6.3MVA nangaphezulu kufuneka ixhotyiswe ngokhuseleko oluhlukeneyo lwe-longitudinal. I-transformers ebalulekileyo kunye ne-6.3MVA kwaye ingaphantsi isebenza ngokuzimeleyo nayo inokuxhotyiswa ngokukhuselwa kokwahlukana kwe-longitudinal.
I-2) Abaguquleli abangaphantsi kwe-10MVA banokuxhotyiswa ngokukhuselwa ngokukhawuleza kwangoku kunye nokukhuselwa ngokugqithisileyo. Kwi-transformers ye-2MVA nangaphezulu, xa i-coefficient yangoku ye-sensitive sensitivity yangoku ingahambelani neemfuno, ukukhuselwa kwe-longitudinal differential kufuneka kufakwe.
3) 0.4MVA nangaphezulu, i-voltage ephambili yi-10kV nangaphantsi, kwaye i-coil i-transformer ene-delta-star connection, kunye nesigaba sesibini sohlobo lwe-relay yokukhusela i-overcurrent ingasetyenziswa.
4) Izixhobo ezahlukeneyo zokhuseleko ezichazwe kweli nqaku ziya kusebenza ukukhulula ii-breakers zesekethe kwicala ngalinye le-transformer.
Izixhobo ezihambelanayo zokukhusela ziya kufakwa kwiimpazamo ze-short-circuit ye-transformer lead ingcingo, i-bushings kunye ne-internals, kwaye iya kuhlangabezana nezi mfuno zilandelayo:
I-1) I-transformer ehambayo enye ye-10MVA nangaphezulu kunye ne-parallel running transformer ye-6.3MVA nangaphezulu kufuneka ixhotyiswe ngokhuseleko oluhlukeneyo lwe-longitudinal. I-transformers ebalulekileyo kunye ne-6.3MVA kwaye ingaphantsi isebenza ngokuzimeleyo nayo inokuxhotyiswa ngokukhuselwa kokwahlukana kwe-longitudinal.
I-2) Abaguquleli abangaphantsi kwe-10MVA banokuxhotyiswa ngokukhuselwa ngokukhawuleza kwangoku kunye nokukhuselwa ngokugqithisileyo. Kwi-transformers ye-2MVA nangaphezulu, xa i-coefficient yangoku ye-sensitive sensitivity yangoku ingahambelani neemfuno, ukukhuselwa kwe-longitudinal differential kufuneka kufakwe.
3) 0.4MVA nangaphezulu, i-voltage ephambili yi-10kV nangaphantsi, kwaye i-coil i-transformer ene-delta-star connection, kunye nesigaba sesibini sohlobo lwe-relay yokukhusela i-overcurrent ingasetyenziswa.
4) Izixhobo ezahlukeneyo zokukhusela ezichazwe kweli nqaku ziya kusebenza ukukhupha ii-breakers zesiphaluka kwicala ngalinye le-transformer.
Ngethuba lokusebenza kwe-transformer, ngenxa yeempazamo zangaphakathi, ngamanye amaxesha asikwazi ukuchonga nokuthatha amanyathelo ngexesha, okulula ukubangela izingozi ezithile. Emva kokukhuselwa kwe-relay yegesi, ukuvela kweziganeko ezifanayo kunokuphetshwa kwinqanaba elithile.
■ Intshayelelo yoKhuseleko lweGesi
Ngethuba lokusebenza kwe-transformer, ngenxa yeempazamo zangaphakathi, ngamanye amaxesha asikwazi ukuchonga nokuthatha amanyathelo ngexesha, okulula ukubangela izingozi ezithile. Emva kokukhuselwa kwe-relay yegesi, ukuvela kweziganeko ezifanayo kunokuphetshwa kwinqanaba elithile.
Ukukhuselwa kwegesi kuhlukaniswe kukhuseleko lwegesi olulula kunye nokukhusela igesi enzima. Umgaqo wesenzo sokukhanya kunye negesi enzima iyahluka. Igesi yokukhanya ibangelwa kukuba igesi iqokelelwe kwikomityi evulekileyo ejonge ezantsi, ukuze indebe evulekileyo idada phantsi kwentshukumo ye-oyile ye-transformer, ivule i-relay, kwaye ikhuphe i-alamu, ebonisa ukuba impazamo i-transformer incinci, kwaye i-oyile ye-transformer Ukubola kwe-Thermal kuvelisa igesi. Igesi enzima ibangelwa yimpazamo enkulu kwi-transformer, xa i-oyile ye-transformer ishushu kwaye ikhula ngokukhawuleza kwaye iqhubela phambili kwi-oyile pillow, i-baffle yangaphakathi yegesi enzima iyatshitshiswa kwi-angle ethile, kwaye i-relay ivuliwe. velisa umqondiso. Indawo yohambo yegalelo eqhelekileyo. Ngaphandle kokuba kukho ukuhluzwa kwe-oyile, ukuzaliswa kweoli kunye neminye imisebenzi. Ngokuqhelekileyo, ukukhuselwa kombane okungenawo umbane we-oil-immersed transformers enkulu kubandakanya: ukukhutshwa koxinzelelo, ukuguqulwa koxinzelelo, njl.
Ukukhuselwa kwegesi ngenye yezinto eziphambili zokukhusela i-transformers, eyeyokukhuselwa okungekho kombane. Umehluko omkhulu phakathi kwezinto ezibizwa ngokuba zikhanyisa kunye nokukhusela igesi enzima ngumahluko kwixabiso lokumisela i-relay yegesi. Irhasi ekhanyayo ithumela kuphela isignali ye-alam, ayikhubeki, kwaye igesi enzima iya kukhubeka. I-voltage ye-zero-sequence ilingana ne-phasor sum ye-voltage yesigaba sesithathu. Indlela yokubala ye-zero yolandelelwano lwangoku iyafana.
■ Uthini umgaqo wokukhusela igesi enzima
Kuthiwa ukukhuselwa kwegesi ye-transformer kusekelwe kumgaqo we-float relay relay. Ikomityi yeoli idibaniswe negumbi le-transformer. Xa i-transformer igcwele, i-overcurrent ivelisa i-gas ukwenza i-float yehla kwindawo ethile. I-relay yokuqala ixhunywe ekukhanyeni. I-alamu yegesi, igesi iyaqhubeka ihla xa i-float inyuswa, kwaye i-relay yesibini ixhunyiwe kwi-gas enzima ukuhamba ngokutshintsha.
■ Umahluko phakathi kwesenzo somgaqo wokukhusela igesi elula kunye nokukhusela igesi enzima
Ukukhuselwa kwegesi kukukhusela okuphambili kwe-transformer, enokubonisa ngokufanelekileyo impazamo yangaphakathi ye-transformer. I-relay yegesi ekhanyayo yenziwe ngekomityi evulekileyo, uqhagamshelwano lwengcongolo eyomileyo, njl., kwaye isebenze kwisignali. Ukuhanjiswa kwerhasi enzima yenziwe ngee-baffles, imithombo, unxibelelwano lweengcongolo, njl.njl., ezisebenza xa kukhubeka.
Ngethuba lokusebenza okuqhelekileyo, i-gas relay izaliswe ngeoli, indebe evulekileyo ifakwe kwioli, ikwindawo ejikelezayo, kwaye unxibelelwano lweengcongolo lunqanyuliwe. Xa iphoso langaphakathi le-transformer lenzeka, ukugqithiswa kwendawo kwenzeka kwindawo ephosakeleyo, okubangela ukwandiswa kweoli ye-transformer esondeleyo, kwaye umoya odibeneyo kwioli uyakhutshwa, wenze ama-bubbles kunye nokunyuka. Xa impazamo incinane, igesi ekhutshiweyo iyenyuka kancinane ize ingene kwindawo yokuhambisa igesi, nto leyo ebangela ukuba ukwehla kweoli. I-fulcrum eveliswa yindebe evulekileyo yi-counterclockwise yokujikeleza kwe-shaft, eyenza ukuba uqhagamshelwano lwengcongolo ludibanise kwaye luthumele umqondiso.
Xa ukungaphumeleli kwangaphakathi kwe-transformer kunzulu, i-gas yegesi enamandla yenziwa, ebangela ukuba uxinzelelo lwangaphakathi lwe-transformer lunyuke ngokukhawuleza, kwaye ukuhamba kweoli enkulu kuchaphazela isalathiso somqamelo weoli. Ngenxa yokuba ukuhamba kweoli kubetha i-baffle, i-baffle yoyisa ukuxhathisa kwentwasahlobo kwaye iqhube imagnethi ukuba yome. Isalathiso soqhagamshelwano lwengcongolo siyashukuma, ukuze unxibelelwano lwengcongolo luvulwe kwaye lusebenze kuhambo.
Uphawu lwe-relay ye-relay ibhekisela kubudlelwane phakathi kobuninzi begalelo kunye nobuninzi bemveliso ye-relay kuyo yonke inkqubo yokutshintsha. Ingaba isenzo okanye ukubuya, i-relay isuka kwindawo yokuqala ukuya kwindawo yokugqibela, akunakwenzeka ukuba uhlale kwindawo ethile ephakathi. Olu phawu lubizwa ngokuba luphawu lwerelay yerelay.
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