Peb-theem tsis sib npaug yog qhov tseem ceeb ntawm kev ntsuas hluav taws xob zoo, txawm hais tias muaj ntau yam uas ua rau peb-theem tsis sib npaug hauv lub zog hluav taws xob, qhov peb-theem tsis sib npaug feem ntau yog vim peb theem tsis muaj kev ua haujlwm, tsis tsim nyog. kab parameter configuration (ib-theem load mismatch tsis sib npaug), thiab lub zog lub zog sib haum xeeb tshaj tus qauv.
Qhov kev tsis txaus ntawm peb-theem yuav ncaj qha mus rau qhov tsis tshua muaj hluav taws xob ntawm cov theem hnyav, qhov nruab nrab taw tes ntws tam sim no tshaj li tus qauv, kev ua haujlwm dhau ntawm lub teeb lub teeb, qhov poob ntawm cov khoom siv hluav taws xob nce, thiab kev nyab xeeb ntawm kev ua haujlwm. hluav taws xob transformer yuav raug cuam tshuam.
Lub tswvyim ntawm peb-theem tsis sib npaug
Peb-theem unbalance txhais tau hais tias lub amplitude ntawm peb-theem tam sim no (los yog voltage) nyob rau hauv lub hwj chim system yog inconsistent, thiab lub amplitude sib txawv tshaj li qhov ntau yam. Vim lub load tsis sib npaug ntxiv los ntawm txhua theem fais fab mov, nws belongs rau lub hauv paus load configuration teeb meem. Qhov tshwm sim ntawm peb-theem tsis sib npaug yog cuam tshuam nrog cov yam ntxwv ntawm cov neeg siv khoom thauj khoom, thiab tseem ua rau kev npaj thiab thauj khoom ntawm cov khoom siv hluav taws xob. Hauv cov kab hluav taws xob hluav taws xob, qhov sib npaug peb-theem feem ntau yog hais txog peb-theem voltage phasor yog qhov sib npaug ntawm qhov loj, thiab yog tias teem rau hauv qhov kev txiav txim ntawm A, B, C, lub kaum sab xis ntawm lawv yog 2n / 3.
Qhov peb-theem tsis sib npaug yog hais txog qhov tsis sib xws ntawm phasor loj thiab lub kaum sab xis. "Power Quality Peb-theem Voltage Allowable Unbalance Degree" (GB/T15543-1995) muaj feem xyuam rau AC rated zaus ntawm 50 Hz. Voltage unbalance ntawm PCC point kev twb kev txuas taw tes tshwm sim los ntawm qhov tsis zoo ib ntus tivthaiv nyob rau hauv ib txwm ua hauj lwm ntawm lub hwj chim system. Tus txheej txheem teev tseg tias tus nqi tso cai ntawm qhov tsis sib npaug raws li kev ua haujlwm ib txwm muaj ntawm cov pej xeem kev sib txuas ntawm lub zog hluav taws xob yog 2%, thiab nws yuav tsum tsis pub tshaj 4% rau lub sijhawm luv luv.
Qhov zoo tshaj plaws peb-theem waveform daim duab thiab tsis sib npaug peb-theem waveform daim duab
Muaj ob txoj hauv kev los xam qhov peb-theem tsis sib npaug
Unbalance %= (qhov siab tshaj tam sim no - tam sim no yam tsawg kawg nkaus) / siab tshaj tam sim no x 100%
Unbalance degree %= (MAX theem tam sim no - peb-theem nruab nrab tam sim no) / peb-theem nruab nrab tam sim no x 100%
Nov yog ib qho piv txwv:
Peb-theem tam sim no yog feem IA=9A IB=8A IC=4A, ces peb theem nruab nrab tam sim no yog 7A, theem-tam sim no - peb-theem nruab nrab tam sim no yog raws li 2A 1A 3A, thiab qhov sib txawv yog qhov loj tshaj plaws, yog li MAX (theem tam sim no - peb theem nruab nrab tam sim no) =3A, yog li peb theem tam sim no tsis sib npaug =3/7.