Ukuvuza kwe-circuit breakerikakhulukazi yakhiwe i-zero sequence current transformer, ibhodi lengxenye ye-elekthronikhi, ukukhululwa kokuvuza kanye ne-circuit breaker enomthwalo omningi nokuvikelwa kwesifunda esifushane.Ingxenye yokuvikela ukuvuza kwe-breaker circuit breaker yakhiwe yi-zero sequence current transformer (ingxenye yokuzwa), isilawuli sokusebenza (ingxenye yokulawula) kanye nokukhululwa kwe-electromagnetic (ingxenye yesenzo neyokusebenzisa).Zonke izigaba kanye nemigqa enguziro yesekethe eyinhloko evikelwe idlula engxenyeni yensimbi yesiguquli samanje sokulandelana kweziro ukuze kwakhiwe uhlangothi oluyinhloko lwe-transformer yamanje yokulandelana kukaziro.Isimiso sokusebenza sokuvuza kwe-circuit breaker singaqondwa ngokuyisisekelo ngokuthi:ukuvuza kwe-circuit breakerayikwazi ukuvikela ukushaqeka kukagesi okunezigaba ezimbili ezithinta izigaba ezimbili ngesikhathi esisodwa.Okulandelayo kuboniswa:
Emfanekisweni, l yikhoyili kazibuthe kagesi, engashayela inkinobho yommese i-K1 ukuze inqamule uma kwenzeka kuvuza.Ingalo yebhuloho ngayinye ixhunywe ochungechungeni ngama-1N4007 amabili ukuze kuthuthukiswe i-voltage yokumelana.Amanani okumelana we-R3 ne-R4 makhulu kakhulu, ngakho-ke uma i-K1 ivaliwe, okwamanje okugeleza ngo-L kuncane kakhulu, okungenele ukubangela ukushintshwa kwe-K1 ukuvula.I-R3 kanye ne-R4 yizici ezilinganisa amandla kagesi ze-thyristors T1 ne-T2, ezinganciphisa amandla kagesi ukumelana nezidingo ze-thyristors.I-K2 iyinkinobho yokuhlola, edlala indima yokulingisa ukuvuza.Cindezela inkinobho yokuhlola i-K2 futhi i-K2 ixhunyiwe, okulingana nokuvuza komugqa obukhoma wangaphandle emhlabeni.Ngale ndlela, isamba se-vector yamanje yolayini wamandla wezigaba ezintathu kanye nolayini onguziro odlula kwendandatho kazibuthe akuyena uziro, futhi kukhona okukhipha amandla kagesi okubangelwayo kuzo zombili iziphetho u-a no-B wekhoyili yokuthola eringini kazibuthe. , okwenza ngokushesha i-T2 conduction.Njengoba i-C2 ishajwa ngogesi othile kusengaphambili, ngemva kokuvulwa kwe-T2, i-C2 izophuma ngo-R6, u-R5 no-T2 ukuze ikhiqize amandla kagesi ku-R5 bese icupha i-T1 ukuze ivule.Ngemva kokuvulwa kwe-T1 ne-T2, okwamanje okugeleza ngo-L kukhuphuka kakhulu, ukuze i-electromagnetic isebenze kanye ne-drive switch K1 inqanyuliwe.Umsebenzi wenkinobho yokuhlola ukuhlola ukuthi ingabe umsebenzi wedivayisi awushintshile noma kunini.Umgomo wesenzo sikazibuthe obangelwa ukuvuza kukagesi wezinto zikagesi uyafana.I-R1 iyi-varistor yokuvikela ugesi ngokweqile.Lokhu ngokuyisisekelo kuhlanganisa umsebenzi obaluleke kakhulu wokuvikela ukuvuza esimisweni sokusebenza sokuvuza kwe-circuit breaker.
Okokugcina, chaza kafushane isimiso sokusebenza kanye nezinye izinhlelo zokusebenza ezivamile zokuvuza kwe-circuit breaker.Njengesisetshenziswa esisebenzayo sobuchwepheshe bokuphepha kukagesi,ukuvuza kwe-circuit breakeriye yasetshenziswa kabanzi futhi yadlala indima ebalulekile.Ngokocwaningo lwezokwelapha, lapho umzimba womuntu uchayeka ku-50Hz alternating current kanye nokushaqeka kukagesi kungu-30mA noma ngaphansi, ungamelana nemizuzu embalwa.Lokhu kuchaza ukusebenza okuphephile kokushaqeka kukagesi womuntu futhi kunikeza isisekelo sesayensi sokuklama nokukhethwa kwamadivayisi okuvikela ukuvuza.Ngakho-ke, ama-circuit breaker avuzayo asethwe egatsheni lamandla lapho izinto zikagesi eziphathwayo kanye nemishini ezindaweni ezimanzi zikhona.Kuyisinyathelo esisebenzayo sokuvimbela ukuthintana okungaqondile kanye nokushaqeka kukagesi.Ngokwezinga likazwelonke, kuyacaca ukuthi "ngaphandle kwesokhethi yamandla e-air conditioning, ezinye izifunda zesokhethi zamandla zizohlonyiswa ngamadivaysi okuvikela ukuvuza".Isenzo sokuvuza samanje singu-30mA futhi isikhathi sesenzo singu-0.1s.Ngicabanga ukuthi lezi zibaluleke kakhulu empilweni yethu yansuku zonke futhi kufanele sizinake.
Umdwebo wohlelo lwesimiso sokusebenza sesivikeli sokuvuza sesistimu yokuphakelwa kwamandla yezintambo ezinezigaba ezintathu.I-TA iyisiguquli samanje sokulandelana kukaziro, i-GF iyiswishi eyinhloko, futhi i-TL iyikhoyili yokukhishwa kwe-shunt yeswishi eyinhloko.
Ngaphansi kwesimo sokuthi isifunda esivikelwe sisebenza ngokujwayelekile ngaphandle kokuvuza noma ukushaqeka kukagesi, ngokomthetho kaKirchhoff, isamba samaphasors amanje ohlangothini oluyinhloko lwe-TA silingana no-zero, okungukuthi, ngale ndlela, uhlangothi lwesibili lwe-TA lwenza. ayikhiqizi amandla e-electromotive, isivikeli sokuvuza asisebenzi, futhi uhlelo lugcina ukunikezwa kwamandla okujwayelekile.
Uma ukuvuza kwenzeka kwisekethe evikelekile noma othile eshaqeka ugesi, ngenxa yokuba khona kwamandla avuzayo, isamba se-phasor sesigaba ngasinye samanje esidlula ohlangothini oluyinhloko lwe-TA asisalingani noziro, okuholela ekuvuzeni kwe-IK yamanje.
I-flux kazibuthe eshintshanayo ivela kumongo.Ngaphansi kwesenzo sokushintshashintsha kazibuthe, amandla e-electromotive akhangisiwe akhiqizwa kukhoyili ohlangothini lwesibili lwe-TL.lesi siginali yokuvuza iyacutshungulwa futhi iqhathaniswe ngesixhumanisi esimaphakathi.Uma ifinyelela inani elinqunyiwe ngaphambili, ikhoyili TL yokukhishwa kwe-shunt yeswishi eyinhloko inikezwa amandla, inkinobho enkulu ye-GF ishayelwa ukuba ihambe ngokuzenzakalelayo, futhi isifunda esinephutha siyanqanyulwa, ukuze kuqashelwe ukuvikeleka.
Isikhathi sokuthumela: Oct-11-2022