Qhov tseem ceeb ntawm Capacitive voltage transformer (CVT)

Capacitive voltage transformer (CVT) yog ib hom hluav taws xob hloov hluav taws xob uas ua rau siv lub zog hluav taws xob faib hluav taws xob thiab hloov hluav taws xob kom hloov pauv qhov hluav taws xob ntau dhau los kom txo qhov voltage uas tsim nyog rau kev ntsuas thiab kev nyab xeeb lub hom phiaj. Qhov tseem ceeb tshaj plaws ntawm CVT tshaj qhov sib txawv voltage transformers yog nws qhov tseeb thiab qhov tseeb hauv kev ntsuas qhov voltage. CVT yog dav siv nyob rau hauv lub zog kis tau tus mob thiab tis tes hauj lwm raws li nws muaj peev xwm cia siab rau thiab kho voltage ntsuas los tiv thaiv lub zog cov cuab yeej tiv thaiv kev puas tsuaj thiab kho kom zoo nkauj lub zej zog kev ua tau zoo.In EHV lub teb chaws daim phiaj tes hauj lwm ntawm utilities, CVTs feem ntau siv rau ob qho tib si kev tiv thaiv thiab kev sib txuas lus lub hom phiaj. CVT ua hauj lwm rau lub hom phiaj ntawm lub peev xwm Transformer thiab Coupling Capacitor.

Rau qhov voltages siab tshaj 100KV, cov pa hom PT yuav kim heev vim yog rwb thaiv tsev.

kev xav tau. Capacitor voltage transformer yog ib qho kev sib txuas ntawm lub capacitor muaj peev xwm divider thiab lub peev xwm sib nqus transformer, hu ua intermediate transformer ntawm qhov sib piv me me.

Ib pawg ntawm high voltage capacitors tsim cov peev txheej faib, capacitance ntawm ob ntu yog C1 thiab C2 feem, Z yog lub nra.

Qhov nruab nrab transformer tus thawj voltage feem ntau yog siab tshaj 10 Kv.

Lub nruab nrab transformer muaj ib tug inductance L, uas tej zaum yuav muaj tag nrho los yog ib feem ntawm cov to-inductance ntawm nws winding.

Tus nqi ntawm L yog hloov kho rau 1 / w2 (C1+C2) kom cov vol poob vim tam sim no los ntawm kev faib khoom raug them. Yog li transformation ratio yog ywj siab ntawm lub nra.

Qhov sib piv tag nrho yog ib yam khoom ntawm qhov sib faib thiab qhov hloov pauv.

Qhov tseeb ntawm CVT yog qhov teeb meem tseem ceeb thaum nws los txog rau qhov ntsuas hluav taws xob vim nws ib zaug cuam tshuam rau kev ntseeg siab ntawm lub zog. Txhawm rau kom paub tseeb tias qhov tseeb ntawm CVT, cov ntsiab lus tseem ceeb uas cuam tshuam rau qhov raug ntawm CVT yog qhov sib piv ntawm qhov hluav taws xob thiab kev hloov pauv ntawm qhov nruab nrab thiab theem nrab voltage. Txhawm rau kom tau txais qhov tseeb ntau dhau, cov ntsiab lus no yuav tsum tau txiav txim siab qhov tseeb ntawm qee theem hauv kev tsim khoom. Ntxiv mus, ib txwm calibration thiab kho dua tshiab ntawm CVT yog qhov tseem ceeb los khaws nws qhov tseeb ntawm lub sijhawm.