Phau Ntawv Qhia rau cov txheej txheem nrhiav kom tauib nrab tso tawm induced voltage xeem
Taw qhia
Ib feem ntawm qhov tso tawm (PD) kev ua haujlwm nyob rau hauv siab -voltage rwb thaiv tsev tshuab yog ib qho tseem ceeb qhia txog qhov tshwm sim ntawm qhov txhaum.Ib nrab tso tawm induced voltage kuajyog ib txoj kev kuaj mob tseem ceeb rau kev ntsuam xyuas kev ncaj ncees ntawm cov khoom siv hluav taws xob xws li transformers, cables, thiab switchgear systems. Txawm li cas los xij, tsuas yog lees paub qhov muaj nyob ntawm PD tsuas yog ib nrab ntawm txoj haujlwm. Qhov kev sib tw tiag tiag thiab ua kom pom tseeb ntawm phau ntawv qhia no yog kev tshawb nrhiav kom raug thiab qhov chaw ntawm qhov chaw tso tawm. Txoj kev tshawb nrhiav thiab kev tshawb nrhiav tau zoo yog qhov tseem ceeb heev rau kev saib xyuas lub hom phiaj, zam kev ua tsis tiav, thiab ua kom muaj kev nyab xeeb ntawm kev ua haujlwm. Kab lus no tham txog cov txheej txheem tseem ceeb tshaj plaws uas siv los txheeb xyuas cov kev phom sij uas pom tsis tau.
Cov txheej txheem tshawb nrhiav yooj yim rau nrhiav PD
Ib txoj hauv kev sib txawv yog feem ntau yuav tsum tau nrhiav kom raug PD qhov chaw. Cov hauv qab no yog cov kev tshawb pom uas siv ntau tshaj plaws thaum lub sij hawm induced voltage test:
1. Txoj kev kuaj xyuas hluav taws xob
Qhov no yog cov pa thiab ncaj qha mus kom ze. Nws koom nrog kev sib txuas ntawm qhov ntsuas qhov ntsuas hauv koob nrog cov khoom ntsuas txhawm rau txhawm rau sau cov pulses tam sim no uas tsim los ntawm txhua qhov tso tawm.
Txoj Cai:PD pulses yog siab -frequency phenomena. Sensors xws li coupling capacitors thiab siab - zaus tam sim no transformers (HFCTs) yog siv los xyuas cov pulses.
Daim ntawv thov:Zoo heev rau quantifying qhov pom tseeb paug load (tseem nyob rau hauv picoCoulombs) thiab txiav txim qhov luaj li cas ntawm qhov paug. Nws yog ib txoj hauv kev rau kev ua raws li kev sim.
Kev txwv:Txawm hais tias nws lees paub PD kev ua haujlwm thiab nws qhov kev siv zog, nws muab cov ntaub ntawv txwv tsis pub hais txog lub cev qhov chaw nyob hauv cov khoom siv loj, tshwj xeeb tshaj yog tias muaj ntau lub sensors.
2.Acoustic emission (AE) kuaj pom
Thaum muaj qhov tso tawm ib nrab, lub zog nthwv dej raug tsim tawm -ib lub tshuab hluav taws xob acoustic emission lossis suab yoj.
- Txoj Cai:Sensitive acoustic sensors (ultrasonic transducers) tau muab tso rau ntawm cov khoom siv sab nraud. Cov sensors no ntes tau lub siab - zaus suab nthwv dej (feem ntau nyob rau hauv lub ultrasonic ntau tshaj 20 kHz) ua los ntawm cov paug.
- Daim ntawv thov: Txoj kev no muaj txiaj ntsig tshwj xeeb rau kev nrhiav PD cov peev txheej hauv cov roj- cov tshuab hloov pauv lossis roj- cov hluav taws xob hluav taws xob. Los ntawm kev siv ntau yam acoustic sensors thiab tshuaj xyuas lub sij hawm sib txawv ntawm kev tuaj txog (TDOA) ntawm lub suab teeb liab, qhov tseeb spatial qhov chaw ntawm PD tuaj yeem raug triangulated.
- Qhov zoo: Tsis yog -intrusive thiab muab kev daws teeb meem zoo heev rau qhov chaw txhaum.
3.Ultra-High Frequency (UHF) Txoj Kev
Kev tso tawm ib nrab kuj tso tawm cov nthwv dej electromagnetic nyob rau hauv ultra-siab zaus spectrum (feem ntau 300 MHz txog 3 GHz).
Txoj Cai: Siv UHF sensors (nrog ua - nyob rau hauv lossis sab nraud kav hlau txais xov) kom tau txais cov teeb liab electromagnetic. Txoj kev no muaj kev nkag siab zoo heev thiab muaj txiaj ntsig zoo tiv thaiv qis - zaus hluav taws xob nrov tsim los ntawm cov tshuab hluav taws xob.
Daim ntawv thov: Siv dav rau kev soj ntsuam tas li hauv cov pa roj-insulated substations (GIS) thiab fais fab transformers. Ua kom pom ntxov ntxov ntawm feeb tawm.
Qhov zoo: Ua ke muaj kev nkag siab zoo nrog kev cuam tshuam tshwj xeeb, tshawb xyuas cov kev ua haujlwm tawm ib nrab txawm tias tshwm sim sib sib zog nqus hauv cov txheej txheem rwb thaiv tsev.
Qhov tseem ceeb ntawm Multi-Txoj Kev Tshawb Nrhiav
Lub tswv yim zoo tshaj plaws rau kev tshawb nrhiav thiab nrhiav qhov tso tawm ib nrab feem ntau xav tau kev sib xyaw ua ke ntawm ntau txoj hauv kev. Piv txwv li:
Ua ntej, txoj kev tshawb nrhiav hluav taws xob tau ua haujlwm kom paub meej tias qhov muaj thiab qhov hnyav ntawm cov paug tawm ib nrab.
Tom qab ntawd, kev tshawb pom acoustic thiab ultra-siab- txoj kev tshawb nrhiav zaus tau siv ib txhij. Cov txheej txheem triangulation yog siv los txiav txim qhov chaw ntawm lub cev ntawm qhov tsis xws luag.
Qhov kev sib koom ua ke no txhawb nqa lub zog ntawm txhua lub thev naus laus zis, ua kom muaj txiaj ntsig zoo rau kev kuaj mob thiab qhov tseeb thaum muab kev ntsuam xyuas dav dav ntawm cov insulator txoj kev noj qab haus huv.
Kev tshawb nrhiav rau qee qhov kev tso tawm thaum lub sij hawm induced voltage test yog ib qho kev ua haujlwm uas dhau mus dhau qhov kev txheeb xyuas yooj yim. Los ntawm kev nkag siab thiab siv ntau txoj hauv kev tshawb pom- hluav taws xob, acoustic, ultra- siab zaus, thiab kho qhov muag- cov engineers tuaj yeem mus dhau qhov yooj yim txheeb xyuas cov teeb meem thiab txheeb xyuas lawv qhov chaw. Qhov kev ua haujlwm hauv cheeb tsam no yog ib kauj ruam tseem ceeb rau kev ua tau zoo thiab tus nqi- kev saib xyuas zoo uas ua kom lub sijhawm ntev - kev ntseeg siab ntawm cov khoom siv hluav taws xob tseem ceeb -voltage. Nrog rau kev nce qib hauv kev kuaj mob thev naus laus zis, kev sib koom ua ke ntawm cov txheej txheem no txuas ntxiv txhim kho, ua kom muaj kev nkag siab tob rau hauv cov xwm txheej ntawm cov hluav taws xob rwb thaiv tsev.
