Cov txheej txheem kuaj rau cov peev txheej hloov pauv tau piav qhia
Potential transformers (PTs) yog qhov tseem ceeb ntawm cov hluav taws xob. Lawv ua lub luag haujlwm tseem ceeb hauv kev txo cov hluav taws xob siab kom qis dua, muaj kev nyab xeeb dua rau cov meters thiab cov cuab yeej tiv thaiv. Nws lav qhov kev nyab xeeb thiab kev ua haujlwm ntawm lub tshuab hluav taws xob. Yog tsis muaj PTs, muaj feem ntau dua ntawm cov khoom siv rhiab heev raug cuam tshuam rau cov teeb meem hluav taws xob siab, uas tuaj yeem ua rau tsis ua tiav thiab muaj kev phom sij. Yog li ntawd, ua kom paub tseeb tias PTs ua haujlwm zoo thiab vam khom yog qhov tseem ceeb rau kev khaws cov khoom siv hluav taws xob. Kab lus hais txog cov txheej txheem kev sim rau cov transformers muaj peev xwm, nws muab qee txoj hauv kev tseem ceeb thiab piav qhia vim li cas lawv tseem ceeb rau kev ua kom lub cev muaj kev nyab xeeb thiab ruaj khov.
ua hauj lwm hauv paus ntsiab lus ntawm tej zaum treansformer
Ua ntej peb nkag mus rau hauv txhua yam ntawm cov kev xeem sib txawv, peb yuav tsum xub kawm txog qhov muaj peev xwm transformers ua li cas thiab lawv haum rau cov duab loj ntawm cov tshuab hluav taws xob. PTs yog ib hom kev ntsuas ntsuas uas txo cov hluav taws xob siab mus rau qib kev nyab xeeb. Cov kauj ruam no - cov txheej txheem nqis qis yog qhov tseem ceeb kom peb tuaj yeem ntsuas qhov hluav taws xob kom raug thiab saib xyuas tag nrho lub cev kom nyab xeeb yam tsis muaj kev pheej hmoo rau peb cov cuab yeej lossis cov neeg siv hluav taws xob siab. Txhawm rau kom paub tseeb tias cov cuab yeej ntsuas ntsuas thiab cov khoom siv tiv thaiv ua haujlwm zoo ua ke, PTs hloov cov hluav taws xob siab rau hauv cov qauv, qis dua. Li ntawd, cov tshuab hluav taws xob tuaj yeem nyob nyab xeeb.
qhov tseem ceeb ntawm kev ntsuam xyuas muaj peev xwm transformer
Txhawm rau kuaj lub peev xwm transformer yog tsim nyog rau qee qhov laj thawj zoo. Ua ntej, nws lav qhov tseeb ntawm qhov ntsuas hluav taws xob, uas yog qhov tseem ceeb rau kev saib xyuas thiab kev tiv thaiv zoo. Kev nyeem hluav taws xob raug cai ua rau tus neeg teb xov tooj ua haujlwm sai yog tias muaj teeb meem nrog lub kaw lus. Qhov thib ob, kev ntsuas tsis tu ncua yog kev tiv thaiv kev tiv thaiv uas pab txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau nws yog qhov yuav tsum tau txiav npluav, qhov kev txiav yuav zoo, nws kuj tseem yuav tsum tau txiav cov txiav, nws tseem yuav ua rau kom tsis txhob muaj cov kab mob. Tsis tas li ntawd, nws tuaj yeem pab peb nrhiav tau cov teeb meem ua ntej lawv tuaj yeem tshwm sim, yog li peb tuaj yeem ua kom cov hluav taws xob ua haujlwm zoo txhua lub sijhawm.
Thiab tseem, nws pab lub transformer kav ntev. Los ntawm kev pom cov teeb meem xws li rwb thaiv tsev tsis zoo los yog teeb meem coil thaum ntxov, cov neeg uas saib xyuas cov transformers tuaj yeem kho cov khoom sai thiab ua rau cov transformers ntev dua. Nws txhim kho kev ua haujlwm ntawm cov hluav taws xob thiab txuag nyiaj ntau lub sijhawm los ntawm kev zam kev hloov pauv ntau zaus lossis kho qhov loj.
kev ntsuam xyuas ntawm lub peev xwm transformer
Muaj ntau ntau txoj hauv kev los sim cov transformers muaj peev xwm, txhua tus muaj nws tus kheej siv thiab lub hom phiaj. Tag nrho ua ke lawv muab tag nrho saib seb qhov transformer ua haujlwm zoo npaum li cas. Txhawm rau nkag siab thiab ua qhov kev sim no ua rau txhua qhov sib txawv ntawm kev muaj lub cev khiav haujlwm zoo lossis ib qho uas nyuaj rau khiav.
Rwb thaiv tsev tsis kam kuaj yog txheej txheem yooj yim ua los xyuas cov rwb thaiv tsev hauv lub transformer. Lub megohmmeter yog siv los muab DC voltage hla lub rwb thaiv tsev thiab ntsuas qhov tsis kam. Tus nqi siab tiv thaiv feem ntau txhais tau hais tias kev rwb thaiv tsev zoo, uas qhia tau tias lub tshuab hloov pauv tau zoo. Ntawm qhov tod tes, tus nqi qis kuj yuav qhia tau tias hnav thiab tsim kua muag lossis muaj teeb meem nrog cov rwb thaiv tsev, yog li nws tsim nyog saib rau hauv.
Rwb thaiv tsev tsis tuaj yeem ntxhov siab txaus vim nws ua rau peb muaj kev nyab xeeb ntawm hluav taws xob tsis raug thiab cia lub tshuab hloov pauv ua nws txoj haujlwm kom raug. Kev ntsuas kev tiv thaiv hluav taws xob yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau ua tiav cov txheej txheem Txoj kev proactive no txhim kho ob qho tib si kev nyab xeeb thiab kev cia siab tag nrho ntawm cov tshuab hluav taws xob.
1. Kev nyab xeeb ua ntej:xyuas kom meej tias lub transformer yog kiag li de{0}}energized thiab cais tawm ntawm lub system kom tsis txhob muaj hluav taws xob txaus ntshai thaum lub sij hawm xeem.
2. Txuas lub megohmmeter:Ua tib zoo txuas qhov kev sim ua rau qhov tseeb transformer terminals, xyuas kom meej tias qhov kev sib txuas yog qhov zoo kom qhov kev nyeem ntawv yog qhov tseeb.
3. Siv Voltage:Pib qhov kev xeem los ntawm kev siv qhov muab hluav taws xob raws li cov neeg tsim khoom cov lus qhia.
4. Cov ntawv sau tseg:Sau qhov kev nyeem ntawv tsis kam uas tau txais thaum lub sijhawm xeem. Sib piv cov nqi no nrog rau cov chaw tsim khoom tshwj xeeb lossis cov qauv kev lag luam los ntsuas qhov kev tiv thaiv kev tiv thaiv.
Turns Ratio Test yog tsim nyog los xyuas qhov piv ntawm thawj thiab theem nrab winding ntawm transformer. Qhov kev ntsuam xyuas no ua kom paub tseeb tias lub transformer txo qhov voltage kom raug raws li nws tsim. Ib qho kev sib txawv ntawm qhov xav tau piv yuav qhia txog cov teeb meem xws li kev puas tsuaj los yog qhov tsis xws luag, uas tuaj yeem cuam tshuam rau lub tshuab ua haujlwm.
1. Npaj cov khoom siv:Ib tug lem ratio tester yog siv los ntsuas qhov lem ratio kom raug.
2. Txuas lub tester:Txuas lub tester kom ruaj ntseg mus rau thawj thiab theem nrab terminals ntawm lub transformer, xyuas kom meej qhov kev twb kev txuas yog lawm.
3. Ua qhov kev xeem:Khiav qhov kev xeem thiab sau tseg ntawm qhov piv koj tau txais. Nws yog ib qho tseem ceeb kom paub tseeb tias qhov kev sim ua tiav raws li kev tswj hwm kom peb thiaj li tau txais txiaj ntsig zoo.
4. Ratio Analysis:Sib piv cov txiaj ntsig tau nrog qhov xav tau piv tau muab los ntawm cov chaw tsim khoom. Ib qho kev sib txawv yuav qhia qee qhov teeb meem winding uas yuav tsum tau kho kom tsis txhob muaj teeb meem ntau dua.
Dielectric absorption test ntsuas qhov zoo ntawm rwb thaiv tsev los ntawm kev soj ntsuam ntev npaum li cas cov khoom siv dielectric absorbs hluav taws xob. Qhov kev sim no muab rau peb qee cov ntaub ntawv hais txog lub xeev ntawm cov rwb thaiv tsev thiab yog tias nws tuaj yeem tswj tau hluav taws xob siab.
1. Kev teeb tsa:Xyuas kom tseeb tias lub transformer yog tag nrho disconnected los ntawm tag nrho cov hwj chim qhov chaw thiab cais kom tsis txhob muaj hluav taws xob txaus ntshai thaum lub sij hawm xeem.
2. Siv Voltage:Siv lub DC qhov hluav taws xob los siv qhov hluav taws xob tas li thoob plaws lub rwb thaiv tsev raws li qhov ntsuas qhov ntsuas.
3. Ntsuas kev tiv thaiv lub sijhawm:Sau cov rwb thaiv tsev tiv thaiv ntawm qee lub sijhawm thiab saib yog tias muaj kev hloov pauv ntawm tus nqi tiv thaiv.
4. Ntsuas:Kev nce siab nyob rau hauv kev tiv thaiv nrog lub sij hawm feem ntau txhais tau hais tias cov rwb thaiv tsev muaj qhov zoo thiab zoo thiab tuaj yeem ua nws txoj haujlwm tiv thaiv zoo.
Excitation tam sim no ntsuas ntsuas tus nqi tam sim no xav tau los ua kom lub zog ntawm thawj winding thiab muab cov ntaub ntawv hais txog qhov xwm txheej ntawm cov tub ntxhais thiab windings. Qhov kev sim no tuaj yeem pab peb nrhiav tau qee qhov teeb meem tseem ceeb nrog cov tub ntxhais thiab cov windings uas yuav ua rau lub tshuab hloov pauv tsis zoo.
1.Energize thawj winding:Txuas lub AC qhov chaw mus rau lub hauv paus winding, xyuas kom meej tias tag nrho cov kev tiv thaiv kev nyab xeeb raug coj.
2. Kev ntsuas tam sim no:Siv lub ammeter los ntsuas qhov excitation tam sim no, thiaj li tau txais cov ntaub ntawv raug rau kev ntsuam xyuas.
3.Piv rau cov qauv:Sib piv cov ntsuas tam sim no rau tus qauv ntsuas qhov tseem ceeb muab los ntawm cov chaw tsim khoom. Cov tam sim no siab dua tuaj yeem txhais tau tias cov tub ntxhais yog saturated lossis muaj luv luv; qhov no yuav xav tau kev tshawb nrhiav ntxiv.
Cov kev ntsuam xyuas yooj yim yuav npog feem ntau qhov kev ntsuam xyuas transformer, tab sis cov txheej txheem siab heev muab rau peb saib zoo dua ntawm transformer kev noj qab haus huv. Lawv tuaj yeem pom cov teeb meem me me uas qhov kev sim tsis tu ncua yuav tsis tuaj.
Sweep Frequency Response Analysis (SFRA) yog ib qho kev kuaj mob nyuaj uas kuaj xyuas qhov kev ncaj ncees ntawm cov tub ntxhais thiab windings los ntawm kev txheeb xyuas cov lus teb zaus. Nws yog qhov zoo tshaj plaws los nrhiav cov teeb meem nrog cov windings tau txais squished los yog cov tub ntxhais txav mus rau sab hauv, uas tuaj yeem hloov pauv qhov hloov pauv zoo li cas. SFRA muab peb cov duab meej ntawm lub tshuab hloov hluav taws xob cov yam ntxwv kom tus kws tshaj lij tuaj yeem pom cov kev hloov pauv uas yuav qhia tau tias muaj teeb meem ntawm kev siv tshuab lossis kev hloov pauv.
Kev ntsuam xyuas ib nrab yog ib txoj hauv kev tshwj xeeb los nrhiav qhov me me ntawm cov rwb thaiv tsev uas tawg. Nrog kev pab los ntawm siab - cov cuab yeej thev naus laus zis, techies tuaj yeem tshawb pom cov chaw uas muaj qhov tso tawm ib nrab kom lawv tuaj yeem kho cov chaw ntawd. Qhov kev ntsuam xyuas no yog qhov tseem ceeb los tiv thaiv kev rwb thaiv tsev los ntawm kev ua tsis tiav vim tias qee qhov kev tso tawm yuav ua rau muaj kev puas tsuaj rau cov rwb thaiv tsev ntau dhau sijhawm. Los ntawm kev daws cov teeb meem me me tam sim ntawd, cov neeg ua haujlwm thev naus laus zis tuaj yeem tiv thaiv kev puas tsuaj loj dua los ntawm qhov tshwm sim thiab ua rau cov tshuab hloov pauv tau ntev dua.
yuav ua li cas kom muaj kev nyab xeeb thiab kev ntseeg siab ntawm lub peev xwm transformer
Txhawm rau kom tau txais txiaj ntsig zoo thiab kom paub tseeb tias koj lub peev xwm hloov pauv yuav kav ntev dua, nws tseem ceeb heev uas yuav tsum ua raws li cov kev coj ua zoo tshaj no. Cov kev coj ua no txhim kho qhov tseeb ntawm kev sim thiab ua kom muaj kev nyab xeeb thiab kev ntseeg siab ntawm cov hluav taws xob zoo ib yam.
· Kev Xeem Tsis tu ncua: Teem lub sijhawm ntsuas raws li kev siv thiab ib puag ncig ntawm transformer. Kev kuaj tsis tu ncua tuaj yeem pab peb pom cov teeb meem ntxov kom peb kho tau sai.
· Siv cov cuab yeej Calibrated:Tag nrho cov ntsuas ntsuas yuav tsum tau ntsuas kom ntsuas qhov tseeb. Cov cuab yeej siv tau raug yog qhov tseem ceeb kom tau txais cov txiaj ntsig kev sim siab uas yuav siv los ua lub hauv paus rau kev txiav txim siab txij nkawm.
· Cov ntaub ntawv tau txais:Khaws ib daim ntawv teev tag nrho cov txiaj ntsig kev xeem kom peb tuaj yeem saib cov xwm txheej dhau sijhawm thiab xa rov qab rau lawv tom qab. Cov ntaub ntawv tseem ceeb vim nws tso cai rau peb taug qab qhov kev ua tau zoo ntawm transformers lub sijhawm thiab txiav txim siab zoo dua.
· Ua raws li Cov Txheej Txheem Kev Nyab Xeeb:Ib txwm ua raws li cov lus qhia kev nyab xeeb kom cov neeg thiab cov cuab yeej muaj kev nyab xeeb thaum kuaj. Cov txheej txheem kev nyab xeeb tau lees paub tias kev sim ua tiav yam tsis muaj kev phom sij rau tib neeg lub neej lossis khoom siv puas tsuaj.
Kev ntsuam xyuas lub peev xwm transformer yog ib qho tseem ceeb ntawm kev ua haujlwm uas lav qhov kev ntseeg tau thiab qhov tseeb ntawm cov hluav taws xob. Los ntawm cov kev sim sib txawv xws li rwb thaiv tsev tiv thaiv, kev hloov pauv, thiab ntau dua li SFRA, cov kws tshaj lij tuaj yeem pom cov teeb meem ua ntej lawv tshwm sim thiab ua kom lub cev ua haujlwm zoo. Kev sim tsis tu ncua ua ke nrog kev ua raws li kev coj ua zoo tshaj plaws pab tiv thaiv kev ua tsis tiav thiab txuas ntxiv lub neej ntawm cov peev txheej hloov pauv. Los ntawm kev nkag siab thiab siv cov txheej txheem xeem no, koj tuaj yeem ua kom paub tseeb tias koj lub peev xwm transformers ua haujlwm tau zoo thiab pab ua kom koj cov hluav taws xob tag nrho muaj kev nyab xeeb thiab ruaj khov. Kev ntsuam xyuas tsis tu ncua thiab ua tib zoo txhim kho qhov kev ntseeg siab ntawm qhov system thiab txhawb nqa kev ua haujlwm ntawm kev saib xyuas, uas ua rau kev txuag nqi thiab kev ua haujlwm zoo dua.
