Transformer-ka eegaya Voltage-ka: Waa maxay sababta ay tahay in Transformer-ga aan waligiis la gaabin

Waa maxay, af cad

Haddii aad rabto inaad cabbirto cadaadiska gudaha biyaha weyn ee magaalada, ma aad xidhi lahayd cabbirka guriga si toos ah tuubada - way dillaaci doontaa. Taa beddelkeeda, waxaad ku rakibi lahayd waalka yareeya si uu cabbirku u arko nabdoon, koobiga yar ee cadaadiska dhabta ah. Beddelka korantada (VT) , oo sidoo kale loo yaqaan transformer awood leh (PT) , wuxuu si sax ah u sameeyaa korontada. Waxay isku xidhaa si barbar socda xariiqda korantada ee sare waxayna isticmaashaa magnetism si ay u samayso nuqul korantada hooseeya oo mitirka, relaysyada, iyo nidaamyada SCADA ay akhriyi karaan iyaga oo aan taaban kilovolts.

Waa muqaalka muraayadda beddelka hadda (CT) ee horraantii taxanahan: CT wuxuu u fadhiyaa si taxane ah oo uu la socdo kaari si uu u cabbiro hadda; VT wuxuu u fadhiyaa barbar socda khadka si loo cabbiro danab.

Mabda'a iyo noocyada

Electromagnetic VT waa koronto-dhaliye si dhib yar u raran. Asal ahaan waxa uu leeyahay wareegyo badan oo silig khafiif ah oo dhan khadka; Dugsiga sare wuxuu leeyahay wareegyo yar oo wuxuu keenaa koronto caadi ah. Marka loo eego IEC 61869-3, korantada sare ee la qiimeeyay badanaa waa 100 V ama 110 V, ama 100/√3 V ee hal waji oo VT ah oo ku xiran khadka dhulka.

Xadhkaha gudbinta, injineeradu waxay badiyaa adeegsadaan beddelka tamarta korantada (CVT) beddelkeeda: xirmada capacitor ayaa marka hore kala qaybiya danabka, ka dibna tafatir yar oo dhexdhexaad ah ayaa gacanta ku haya inta kale. Tani waxay ka fogaynaysaa xajmiga iyo dhibaatooyinka dahaarka ee dhaawaca buuxa ee VT ee boqollaal kilovolts.

Halbeegyada muhiimka ah waa in injineerku dejiyaa

• Qiyaasta isbeddelka ee la qiimeeyay - tusaale, 11 000 V / 110 V, oo lagu dejiyay saamiga leexashada.
• Culeyska la qiimeeyay (VA) - awoodda muuqata ee dugsiga sare ayaa bixin kara isagoo ku jira xadka saxda ah. IEC 61869-3 waxay ku siinaysaa qiyamka caadiga ah sida 10, 25, 50, iyo 100 VA at 0.8- factor power.
• Fasalka saxda ah - qiyaasida fasallada 0.1, 0.2, 0.5, 1.0, 3.0; fasalada ilaalinta 3P iyo 6P. Fasalka waxaa la dammaanad qaaday kaliya marka danab labaad uu u dhexeeyo 80% iyo 120% ee la qiimeeyay culeyskuna uu u dhexeeyo 25% iyo 100% ee la qiimeeyay (sida IEC 61869-3 iyo Schneider Electric MV hagaha).
• Qodobka tamarta la qiimeeyay - intee in le'eg ayay VT aad u faraxsanaan kartaa inta lagu jiro cilladda dhulka hal-waji ah. Qiimaha caadiga ah waa 1.2 joogto ah, 1.5 ee 30 s, ama 1.9 ee 8 saacadood, taas oo ku xidhan dhul dhiska.

Tusaalaha codsiga

Kubicle 11kV ah oo gudaha ah, saddex weji oo VT ah ayaa badanaa leh laba dabaylood oo kala duwan: 0.5-class core for metering dakhliga iyo 3P-class core for protection. Dabaysha hadhaaga ah ayaa laga yaabaa in lagu xidho meel banaan ah si loo ogaado cilada dhulka. Wareegga sare oo dhan waxa uu ku qotomay hal dhibic, sida CT-ga oo kale.

Khalad guud iyo xaqiiqo xiiso leh

Fikrad khaldan: "Transformers-ka qalabku waa isku mid, markaa isla xeerka badbaadada ayaa khuseeya." Sidaas maaha. CT-ga waa in aan waligiis la furin sababtoo ah hadda waxa uu ku xiran yahay culeyska; labaad furan oo awood dhammaan in magnetomotive xoog xudunta u ah oo abuurtaa danab sare oo dilaa ah. VT, si kastaba ha ahaatee, waa in aanu waligiis gaabin sababtoo ah dugsigiisa sare waxa loogu talagalay in uu ku shaqeeyo meel furan oo ku dhow; muddo gaaban ayaa burburisa culeyska culeyska oo wuxuu kaxeeyaa qulqul aad u weyn iyada oo loo marayo dabaysha khafiifka ah ee labaad, taas oo burburinaysa.

Xaqiiqo xiiso leh: VT waa la dhaawacmi karaa iyada oo aan wax qalad ah oo fiilooyinka ah gabi ahaanba la helin. Shabakado go'doon-dhex-dhexaad ah ama xargo-culus, VT magnetizing inductance iyo awoodda shabakadu waxay samayn karaan wareeg-resonant aan toos ahayn oo loo yaqaan ferroresonance . Marka ay kiciso dhacdo beddelaad ah ama cilad dhulka, VT-gu waxa uu soo jiitaa birlab culus oo hadda jira, kulayl badan, oo dillaaci kara gurigeeda iyada oo heerka labaad uu u muuqdo mid caadi ah. Injineerada inta badan waxay kaga hortagaan iska caabiyaha qoynaya ee guud ahaan dabaylaha delta-furan.