Lub tshuab hluav taws xob tswj hluav taws xob ntawm lub tshuab hluav taws xob tau muab faib ua qhov hloov pauv "off-excitation" voltage regulating device thiab transformer "on-load" tap changer.
Ob leeg xa mus rau qhov voltage regulating hom ntawm transformer kais changer, yog li dab tsi yog qhov txawv ntawm ob?
① Lub "off-excitation" kais hloov pauv yog hloov lub siab-voltage sab kais ntawm lub tshuab hloov pauv hloov pauv qhov sib piv ntawm winding rau kev tswj qhov hluav taws xob thaum ob sab thawj thiab theem nrab ntawm lub tshuab hloov pauv tau raug txiav tawm ntawm lub hwj huam mov.
② "On-load" kais hloov pauv: Siv lub tshuab hluav taws xob ntawm lub tshuab hluav taws xob hloov pauv, tus kais ntawm lub tshuab hluav taws xob hloov pauv hloov pauv hloov hluav taws xob siab rau kev tswj hluav taws xob yam tsis tau txiav tawm tam sim no.
Qhov sib txawv ntawm ob yog tias qhov off-excitation kais hloov pauv tsis muaj peev xwm hloov lub zog nrog kev thauj khoom, vim tias hom kev hloov pauv no muaj cov txheej txheem luv luv rau lub sijhawm hloov cov txheej txheem. Disconnecting lub load tam sim no yuav ua rau arcing ntawm cov neeg sib cuag thiab puas lub kais changer. Lub on-load kais hloov pauv muaj kev hloov pauv ntau dhau thaum lub sijhawm hloov cov txheej txheem, yog li tsis muaj cov txheej txheem luv luv. Thaum hloov los ntawm ib lub iav mus rau lwm qhov, tsis muaj txheej txheem arcing thaum lub sijhawm thauj khoom tam sim no raug txiav. Nws yog feem ntau siv rau transformers nrog nruj voltage yuav tsum tau nquag hloov.
Txij li thaum lub transformer "on-load" kais hloov pauv tuaj yeem paub qhov kev tswj hwm qhov hluav taws xob nyob rau hauv lub xeev kev ua haujlwm ntawm lub tshuab hloov pauv, vim li cas thiaj xaiv "off-load" kais hloov pauv? Tau kawg, thawj qhov laj thawj yog tus nqi. Raws li qhov xwm txheej ib txwm muaj, tus nqi ntawm cov khoom siv hluav taws xob hloov pauv hloov pauv yog 2/3 ntawm tus nqi ntawm cov khoom siv hluav taws xob hloov pauv; Nyob rau tib lub sijhawm, qhov ntim ntawm lub tshuab hluav taws xob off-load kais hloov pauv yog qhov me dua vim tias nws tsis muaj cov khoom siv hluav taws xob hloov pauv. Yog li ntawd, thaum tsis muaj kev cai lossis lwm yam xwm txheej, lub tshuab hluav taws xob off-excitation kais hloov pauv yuav raug xaiv.
Vim li cas ho xaiv lub transformer on-load kais changer? Lub luag haujlwm yog dab tsi?
① Txhim kho tus nqi tsim nyog voltage.
Lub zog xa hluav taws xob hauv lub zog hluav taws xob faib hluav taws xob ua rau poob, thiab qhov poob tus nqi yog qhov tsawg tshaj plaws nyob ze ntawm qhov ntsuas hluav taws xob. Ua raws li kev tswj hwm ntawm cov khoom siv hluav taws xob, ib txwm ua kom lub chaw nres tsheb npav hluav taws xob tsim nyog, thiab ua kom cov khoom siv hluav taws xob khiav ntawm lub ntsuas hluav taws xob hauv lub xeev yuav txo qhov poob, uas yog qhov zoo tshaj plaws thiab tsim nyog. Tus nqi tsim nyog voltage yog ib qho ntawm cov cim tseem ceeb ntawm cov khoom siv hluav taws xob zoo. Kev tswj xyuas qhov hluav taws xob raws sij hawm tuaj yeem ua kom ntseeg tau qhov kev tsim nyog voltage, yog li ua tau raws li cov kev xav tau ntawm tib neeg lub neej thiab kev lag luam thiab kev ua liaj ua teb.
② Txhim kho lub reactive fais fab nyiaj them peev xwm thiab ua kom lub capacitor input tus nqi.
Raws li cov khoom siv hluav taws xob reactive, cov khoom siv hluav taws xob reactive ntawm lub hwj chim capacitors yog proportional rau lub square ntawm kev khiav hauj lwm voltage. Thaum lub zog ua haujlwm ntawm lub zog hluav taws xob txo qis, cov nyiaj them poob haujlwm poob qis, thiab thaum lub zog ua haujlwm nce, cov khoom siv hluav taws xob tau overcompensated, ua rau lub davhlau ya nyob twg voltage nce, txawm tias tshaj tus qauv, uas yooj yim rau kev puas tsuaj ntawm cov khoom siv hluav taws xob. thiab ua rau
khoom siv xwm txheej. Txhawm rau tiv thaiv lub zog reactive los ntawm kev pub rov qab mus rau lub zog hluav taws xob thiab cov khoom siv hluav taws xob reactive los ntawm kev ua tsis taus, ua rau cov khoom pov tseg thiab ua rau poob ntawm cov khoom siv hluav taws xob ntau ntxiv, lub ntsiab transformer kais hloov yuav tsum tau kho nyob rau lub sijhawm los kho lub tsheb npav. voltage mus rau qhov tsim nyog ntau yam, yog li tsis tas yuav lov tes taw capacitor them nyiaj.
Yuav ua li cas khiav qhov kev tswj ntawm on-load voltage?
Cov txheej txheem ntawm kev tswj qhov hluav taws xob muaj xws li kev tswj hluav taws xob hluav taws xob thiab kev tswj xyuas hluav taws xob.
Lub ntsiab lus ntawm kev tswj qhov hluav taws xob ntawm qhov hluav taws xob yog los kho qhov hluav taws xob los ntawm kev kho qhov hloov pauv ntawm lub siab-voltage sab thaum qhov hluav taws xob nyob rau sab qis-voltage tseem tsis hloov pauv. Peb txhua tus paub tias sab high-voltage feem ntau yog qhov system voltage, thiab qhov system voltage feem ntau tas li. Thaum tus naj npawb ntawm cov lem ntawm high-voltage sab winding yog nce (uas yog, qhov kev hloov pauv tau nce), qhov voltage ntawm qhov qis-voltage sab yuav txo qis; ntawm qhov tsis sib xws, thaum tus naj npawb ntawm kev hloov pauv ntawm qhov siab-voltage sab winding raug txo qis (uas yog, qhov hloov pauv hloov tau txo), qhov hluav taws xob ntawm sab qis-voltage yuav nce. Ntawd yog:
Nce lem = downshift = voltage txo Reduction lem = upshift = voltage nce
Yog li, nyob rau hauv qhov xwm txheej dab tsi tuaj yeem hloov pauv tsis tuaj yeem ua rau ntawm lub tshuab hluav taws xob hloov pauv?
① Thaum lub transformer yog overloaded (tshwj tsis yog rau cov xwm txheej tshwj xeeb)
② Thaum lub teeb roj ceeb toom ntawm cov khoom siv hluav taws xob hluav taws xob hluav taws xob tau qhib
③ Thaum cov roj siab tsis kam ntawm cov khoom siv hluav taws xob ntawm cov khoom siv hluav taws xob tsis tsim nyog lossis tsis muaj roj hauv cov roj cim
④ Thaum tus naj npawb ntawm cov kev cai voltage tshaj li tus lej teev
⑤ Thaum cov cuab yeej tswj hluav taws xob tsis zoo
Vim li cas ho overload kuj xauv lub on-load kais changer?
Qhov no yog vim nyob rau hauv ib txwm muaj xwm txheej, thaum lub sij hawm on-load voltage tswj txheej txheem ntawm lub ntsiab transformer, muaj ib tug voltage sib txawv ntawm lub ntsiab connector thiab lub hom phiaj kais, uas generates ib tug circulating tam sim no. Yog li ntawd, thaum lub sij hawm tus txheej txheem voltage, ib tug resistor yog kev cob cog rua nyob rau hauv parallel kom bypass lub circulating tam sim no thiab load tam sim no. Lub parallel resistor yuav tsum tau tiv taus qhov tam sim no loj.
Thaum lub hwj chim transformer yog overloaded, kev khiav hauj lwm tam sim no ntawm lub ntsiab transformer tshaj qhov ntsuas tam sim no ntawm tus kais hloov pauv, uas tuaj yeem hlawv qhov txuas txuas ntawm tus kais hloov pauv.
Yog li ntawd, txhawm rau tiv thaiv qhov tshwm sim arcing ntawm tus kais hloov pauv, nws yog txwv tsis pub ua kev tswj hwm ntawm qhov hluav taws xob thaum lub ntsiab transformer yog overloaded. Yog tias qhov kev tswj hwm qhov hluav taws xob raug yuam, cov khoom siv hluav taws xob ntawm cov khoom siv hluav taws xob tuaj yeem hlawv tawm, cov roj hluav taws xob tuaj yeem qhib tau, thiab qhov hloov pauv tseem ceeb yuav raug tripped.
Post lub sij hawm: Sep-09-2024