Ulwazi olupheleleyo malunga noKhuseleko oluPhambili lweTransformer kunye noKhuselo oluSebenzayo

I-Transformer yindlela eqhubekayo yokusebenza kwezixhobo ezingashukumiyo, indlela ethembekileyo ngakumbi yokusebenza, amathuba amancinci okusilela. Kodwa ngenxa yokuba uninzi lwee-transformer zifakelwe ngaphandle, kwaye zichaphazeleka kukusebenza komthwalo kunye nempembelelo yesiphako sesekethe esifutshane senkqubo yamandla, kwinkqubo yokusebenza, ngokungathandabuzekiyo kukho zonke iintlobo zeempazamo kunye neemeko ezingaqhelekanga.

1. Iimpazamo eziqhelekileyo kunye nokungahambi kakuhle kwee-transformers

2. Uqwalaselo lokhuseleko lwe-transformer

3. Ukhuseleko olungelulo umbane

(1) Ukukhuselwa kwegesi

(2) Ukhuseleko loxinzelelo

(3) Ukhuseleko lobushushu kunye nenqanaba leoyile

(4) Ukhuseleko olupholileyo oluhlala ixesha elide

4. Ukhuseleko olwahlukileyo

(1) Umsinga wokungena we-transformer osebenzisa imagnethi

(2) Umgaqo we-harmonic restriction yesibini

(3) Ukhuseleko olukhawulezileyo oluhlukeneyo

Yazisa ngokufutshane ezi ngokhuseleko oluphambili lwe-transformer, kwaye uqhubeke nokwazisa ukhuseleko olungasemva lwe-transformer. Kukho iintlobo ezininzi zolungiselelo lokhuseleko olungasemva lwee-transformer. Nantsi intshayelelo emfutshane kwiintlobo ezimbini zokhuseleko olungasemva, ukhuseleko olugqithisileyo kunye nokhuseleko lomhlaba lwe-transformer.

1. Ukhuseleko olugqithisileyo ngokuvala ngaphandle koxinzelelo kwakhona

2. Ukukhuselwa komhlaba wetransformer

Ukhuseleko olungasemva lweziphene ze-grounding short-circuit ze-transformers ezinkulu neziphakathi ludla ngokuquka: ukhuseleko lwe-zero sequence overcurrent, ukhuseleko lwe-zero sequence overvoltage, ukhuseleko lwe-gap, njl. Oku kulandelayo yintshayelelo emfutshane esekelwe kwiindlela ezintathu ezahlukeneyo ze-grounding ze-neutral point.

(1) Ingongoma engathathi cala isekelwe ngqo

(2) Ingongoma engathathi cala ayisekelwanga

(3) Ingongoma engathathi cala isekelwe kumsantsa wokukhupha

Iitransformer ze-voltage ephezulu kakhulu zonke ziitransformer ezifakwe i-semi-insulation, kwaye i-ground insulation ye-neutral point coil ibuthathaka kunezinye iindawo. I-neutral point insulation ilula ukuphuka. Ke ngoko, kufuneka kulungiselelwe ukhuseleko lwe-gap.

Umsebenzi wokukhusela isithuba kukukhusela ukhuseleko lokufakelwa kwe-insulation kwindawo engathathi hlangothi yendawo engathathi hlangothi ye-transformer.

Ukhuseleko lwesithuba lufumaneka ngokusebenzisa i-gap current 3I0 ehamba kwindawo engathathi cala ye-transformer kunye ne-open delta voltage 3U0 ye-busbar PT njenge-criterion.

Ukuba indawo engathathi cala yesiphako inyuka iye kwindawo, isithuba siyaqhekeka kwaye kuvela umsinga omkhulu wesithuba esingu-3I0. Ngeli xesha, ukhuseleko lwesithuba luyasebenza kwaye i-transformer iyanqunyulwa emva kokulibaziseka. Ukongeza, xa kwenzeka impazamo yomhlaba kwinkqubo, indawo engathathi cala iyasuswa kwaye ukhuseleko lwe-zero sequence ye-transformer luyasebenza, kwaye indawo engathathi cala iyasuswa kuqala. Emva kokuba inkqubo ilahlekelwe yindawo yokumisa umhlaba, ukuba impazamo isekhona, i-open delta voltage engu-3U0 ye-busbar PT iya kuba nkulu kakhulu, kwaye ukhuseleko lwesithuba luya kusebenza ngeli xesha.