Txoj kev xaim ntawm xoom sequence tam sim no tus qauv transformer
Dec 06, 2023| Lub hauv paus ntsiab lus ntawm qhov seem (zero sequence) kev tiv thaiv tam sim no yog raws li Kirchhoff txoj cai tam sim no. Lub algebraic sum ntawm cov complex tam sim no ntws mus rau hauv ib qho ntawm lub Circuit Court yog sib npaug zos rau xoom. Raws li ib txwm muaj ntawm circuits thiab khoom siv hluav taws xob, vector sum ntawm ntau yam tam sim no yog sib npaug rau xoom. Yog li ntawd, qhov thib ob winding ntawm qhov seem (zero sequence) tam sim no tus qauv transformer tsis muaj teeb liab tawm thiab lub actuator tsis ua haujlwm. Thaum muaj teeb meem hauv av, qhov vector sum ntawm txhua theem tam sim no tsis yog xoom. Qhov txhaum tam sim no generates magnetic flux nyob rau hauv lub nplhaib core ntawm lub tam sim no transformer, thiab lub thib ob sab induced voltage ntawm lub zero-sequence tam sim no tus qauv transformer ua rau lub actuator ua hauj lwm thiab tsav tripping. ntaus ntawv hloov lub zog mov network kom ua tiav lub hom phiaj ntawm kev tiv thaiv hauv av.
Muaj nuj nqi: Thaum muaj hluav taws xob poob lossis qhov ua txhaum ntawm qhov hluav taws xob tshwm sim hauv Circuit Court, kev tiv thaiv yuav ua thiab txiav tawm lub hwj chim.
Kev Siv: Koj tuaj yeem nruab ib lub tshuab hloov tam sim no ntawm txhua kab ntawm peb theem, lossis cia peb-theem conductors hla dhau qhov seem (zero sequence) tam sim no transformer ua ke. Koj tuaj yeem nruab qhov seem (zero sequence) tam sim no transformer ntawm cov kab nruab nrab N. , siv nws los xyuas cov vector sum ntawm peb theem.
Qhov seem tam sim no yog hais txog cov vector sum ntawm cov txiaj ntsig tam sim no ntawm qhov tam sim no dhau los ntawm lub ntsiab Circuit Court ntawm cov khoom siv tiv thaiv tam sim no (zero sequence transformer), qhia hauv nws cov txiaj ntsig zoo. Rau ib theem kab, qhov seem tam sim no yog qhov txheeb ze av to tam sim no; rau kab peb-theem, qhov seem tam sim no yog vector sum ntawm cov nqi tam sim no ntawm txhua theem tam sim no, sawv cev los ntawm nws cov txiaj ntsig zoo. Lub residual tam sim no transformer tuaj yeem txiav tawm hauv Circuit Court thaum cov seem tam sim no hauv kev tiv thaiv hluav taws xob ntau tshaj li cov nqi teev nyob rau hauv cov xwm txheej. Ib tug relay tiv thaiv ntaus ntawv uas xa ib lub tswb ceeb toom.
Qhov seem tam sim no tus qauv transformer txais kev tiv thaiv hauv paus ntsiab lus ntawm txiav tawm lub hwj chim mov. Tus nqi tiv thaiv ncaj qha yog ib qho kev tiv thaiv ntxiv rau kev tiv thaiv yooj yim tiv thaiv kev pheej hmoo ntawm hluav taws xob poob siab. Hauv kev tiv thaiv kev tiv thaiv tsis ncaj, nws yog siv los tiv thaiv kev txwv tsis pub muaj kev pheej hmoo ntawm hluav taws xob poob siab thiab hluav taws xob hluav taws xob tshwm sim los ntawm kev ua txhaum hauv av uas nqa cov hluav taws xob txaus ntshai hauv cov khoom siv hluav taws xob.