Yuav Ua Li Cas Ntsuam Xyuas Ib Lub Transformer hauv Ib Qhov Chaw Xeem

Kev xeem afais fab mov transformerntawm qhov chaw kuaj mob (qee zaum hu ua lub rooj zaum sim lossis lub Hoobkas lees txais kev teeb tsa) yog txhua yam hais txog kev ua kom lub tsev ruaj khov, ua tau raws li qhov xav tau, thiab muaj kev nyab xeeb rau kev pabcuam. Nws feem ntau ua raws li cov qauv zoo li IEEE C57.12.00 / C57.12.90 rau roj-cov hloov pauv lossis IEC 60076. Lub hom phiaj yog txhawm rau ntes txhua yam kev tsim khoom tsis xws luag, lees paub cov ntaub ntawv npe, thiab txheeb xyuas cov rwb thaiv tsev lub zog thiab kev ua haujlwm hluav taws xob.

Lub taub hau ceev tab sis tseem ceeb -nce: Cov kev ntsuam xyuas no suav nrog cov high voltages thiab cov tam sim no. Tsuas yog cov neeg tsim nyog nrog kev cob qhia kom raug yuav tsum ua lawv. Hnav txoj cai PPE - hnab looj tes insulated, arc- cov khaub ncaws hnav, tsom iav kev nyab xeeb, lub kaus mom tawv, ua haujlwm. Ib txwm ua raws li cov txheej txheem kaw / tagout, hauv av txhua yam kom zoo, ob npaug - xyuas tias lub tshuab hloov pauv yog de- zog, thiab tso tawm txhua lub zog khaws cia ua ntej thiab tom qab kuaj. Kev nyab xeeb thawj - tsis muaj shortcuts.

Ua ntej dhia mus rau hauv qhov kev ntsuam xyuas hluav taws xob, siv sij hawm rau qee qhov kev kuaj xyuas yooj yim:

Ua kom tagkev tshuaj xyuas qhov muag thiab kho tshuab. Saib rau txhua qhov kev puas tsuaj, cov roj xau (ntawm cov kua- cov khoom ntim), cov roj qib kom raug, kev sib txuas nruj, cov bushings zoo, thiab txhua yam khoom siv xws li kiv cua, twj, thiab lub tshuab hloov pauv tau zoo.

Txheeb xyuas qhovnpephim cov specs uas koj tau xaj - qhov ntsuas hluav taws xob, kVA / MVA, impedance, vector pawg, thiab lwm yam.

Rau cov roj- puv transformers, sim cov roj rau dielectric zog, ya raws, yaj gas analysis (DGA), acidity, thiab hais txog. Xyuas kom txhua yam qhuav thiab kaw kom zoo.

Teeb tsa koj qhov kev ntsuas kev nyab xeeb: cais chav tsev, hauv av tag nrho cov terminals thiab cov tub ntxhais / lub tank, luv ib qho CT thib ob yog tias xav tau, thiab muaj cov cuab yeej ntsuas ntsuas ntsuas. Nco ntsoov qhov kub thiab txias vim tias koj yuav tsum tau kho cov ntawv nyeem rau nws.

Cov cuab yeej uas koj xav tau muaj xws li multimeter, rwb thaiv tsev tiv thaiv tester (Megger), tig ratio meter (TTR), micro-ohmmeter rau winding resistance, power factor/tan delta kit, poob ntsuas, thiab siab -voltage test sets for dielectric tests.

Cov no yog cov qauv kuaj xyuas ua raws li qhov kev txiav txim siab - feem ntau qis - qhov ntsuas hluav taws xob ua ntej, tom qab ntawd siab -voltage ones - yog li kev sim ua ntej tsis cuam tshuam tom qab cov txiaj ntsig.

Winding Resistance: Siv lub micro-ohmmeter lossis Kelvin choj los ntsuas qhov DC tsis kam ntawm txhua qhov winding. Sib piv qhov tseem ceeb (kub- kho) rau lub Hoobkas lossis daim ntawv teev npe. Qhov no pab pom kev sib txuas tsis zoo, cov hlua tawg, lossis lwm yam teeb meem. LV windings feem ntau qhia tsis tshua muaj zog, thaum HV sawv daws siab dua.

Rwb thaiv tsev Resistance (IR) / Megger Test: Siv DC voltage (feem ntau 500 V rau 5 kV nyob ntawm qhov ntsuas) ntawm windings thiab hauv av, thiab ntawm qhov sib txawv windings. Siv sijhawm 60-thib ob "qhov chaw" nyeem lossis suav cov polarization Performance index (10-min vs 1-min). Zoo, qhuav rwb thaiv tsev muab siab nyeem ntawv; Cov lej qis feem ntau txhais tau hais tias ya raws lossis kab mob. Tsis txhob hnov ​​​​qab xyuas cov tub ntxhais-rau-hauv av rwb thaiv tsev ib yam nkaus.

Hloov piv, Polarity, thiab Phase Relation: Siv lub ntsuas TTR los siv qhov hluav taws xob qis AC rau ib qho kev sib tw thiab ntsuas lwm qhov. Paub meej tias qhov sib piv sib npaug ntawm daim ntawv teev npe (feem ntau nyob rau hauv ± 0.5%) hla txhua tus kais dej, suav nrog rau ntawm -load kais hloov pauv txoj haujlwm. Kuj txheeb xyuas polarity thiab pawg vector (zoo li Dyn11). Feem ntau koj yuav pom qhov excitation tam sim no thaum qhov kev sim no thiab.

Tsis muaj-Load Poob thiab Magnetizing Current (Qhib-Circuit Test): Ua kom lub zog LV sab ntawm qhov ntsuas hluav taws xob thiab zaus nrog rau sab nraud qhib. Ntsuas lub hwj chim (cov tub ntxhais / hlau poob), tsis muaj -load tam sim no (feem ntau tsuas yog ib feem me me ntawm cov ntsuas tam sim no), thiab ib qho kev sib haum xeeb. Qhov no qhia koj ntau txog qhov zoo ntawm cov tub ntxhais.

Load poob thiab impedance (luv-Circuit Test): Luv luv LV sab thiab siv txo qhov hluav taws xob mus rau HV sab kom txog thaum ntsuas tam sim no ntws. Ntsuas lub zog (tsuas yog tooj liab poob) thiab qhov hluav taws xob poob kom tau qhov feem pua ​​impedance. Qhov no yuav tsum ua raws li cov npe ntawm cov nqi.

Power Factor / Tan Delta Test: Txheeb xyuas qhov zoo ntawm cov rwb thaiv tsev thiab dielectric poob. Cov nqi qis dua feem ntau txhais tau tias muaj kev noj qab haus huv, rwb thaiv tsev kom qhuav.

Dielectric Withstand Tests:

Kev ntsuas hluav taws xob siv hluav taws xob (sib cais) - siab AC voltage siv rau txhua qhov winding rau hauv av rau ib feeb.

Induced voltage test - feem ntau ntawm ob zaug ntsuas qhov voltage tab sis ntawm qhov zaus ntau dua rau kev ntxhov siab tig - mus rau -tig rwb thaiv tsev yam tsis muaj saturating lub hauv paus. Kev ntsuas qhov tso tawm ib nrab yog qee zaum suav nrog.

Rau cov chav kawm muaj hluav taws xob siab dua, koj tuaj yeem ua hluav taws xob impulse (BIL) lossis hloov cov kev ntsuas impulse los simulate surges.

Xyuas covpawg vectorthiab ua ib qho kev ntsuas sib nqus kom paub meej tias theem kev sib raug zoo.

Khiav lubntawm -load tap changer (OLTC)los ntawm txhua txoj haujlwm - saib lub sijhawm, txuas ntxiv, thiab cov kauj ruam voltage.

Kuaj cov tshuab pabcuam: cov kiv cua txias / twj tso kua mis, ntsuas qhov ntsuas kub (xws li kub- qhov chaw), tswb, Buchholz relay, cov cuab yeej siv siab, thiab lwm yam.

Rau cov roj- cov khoom ntim puv, ua qhov ntsuas siab / tawm ntawm lub tank.

Sweep Frequency Response Analysis (SFRA lossis FRA) yog qhov zoo rau kev kuaj xyuas txhua qhov kev hloov kho tshuab lossis winding deformation - tshwj xeeb tshaj yog tias koj muaj tus ntiv tes hauv qab.

Cov no tsis ua tiav ntawm txhua chav tab sis yuav tsum tau ua rau cov qauv lossis ib tus neeg siv khoom tshwj xeeb:

Kub nce (kub khiav) kuaj xyuas kom txias nyob rau hauv tag nrho load.

Luv-circuit tiv thaiv kev ntsuas rau txhua yam muaj zog.

Kev ntsuas suab (suab nrov) ntsuas.

Cov ncauj lus kom ntxaws ntxiv ib feem ntawm qhov tso tawm lossis txiav tawm -wave impulse tests.

Feem ntau cov chaw kuaj mob ua raws li qhov no:

Kev kuaj pom pom / siv tshuab + roj xyuas.

Winding kuj.

Rwb thaiv tsev tsis kam thiab lub zog muaj zog.

Tig piv thiab polarity ntawm tag nrho cov kais dej.

Tsis muaj -load poob thiab excitation tam sim no.

Load poob thiab impedance.

Dielectric tiv thaiv kev xeem.

Coj mus rhaub changer thiab auxiliary equipment checks.

Qhov kawg rwb thaiv tsev tiv thaiv tom qab qhov siab -voltage tests.

Tag nrho cov txiaj ntsig tau muab piv rau cov nqi ntawm daim ntawv teev npe, lub hauv paus ntawm lub Hoobkas, thiab kev ua siab ntev hauv cov qauv. Txhua yam tawm tuaj yeem txhais tau tias muaj qhov tsis xws luag uas yuav tsum tau kho.

Rau me me transformers los yog qhuav -hom units, cov txheej txheem zoo sib xws tab sis scaled down (tsis muaj roj, piv txwv li). Yog tias koj tab tom sim lub tshuab hluav taws xob laus lossis tsis paub, pib qhov kev tiv thaiv, txuas ntxiv, thiab qis- qhov ntsuas qhov ntsuas hluav taws xob ua ntej maj mam siv qhov hluav taws xob thaum kaw qhov muag ntawm tam sim no thiab kub.

Qhov tseeb voltages, cov txheej txheem, thiab kev lees paub txwv nyob ntawm qhov loj ntawm transformer qhov loj, chav kawm voltage, thiab hom, yog li nco ntsoov xyuas cov ntawv qhia tshwj xeeb, cov phiaj xwm kev sim, thiab cov qauv IEEE / IEC. Thaum tsis ntseeg siab - tshwj xeeb tshaj yog nrog loj lossis siab -voltage units - ua haujlwm nrog cov chaw tsim khoom lossis chaw kuaj pom muaj ntawv pov thawj.

Yog tias koj tab tom cuam tshuam nrog ib hom kev hloov pauv (substation power unit, ncoo -mount tis, qhuav- hom, thiab lwm yam), thov tsis txhob muab cov ntsiab lus ntxiv thiab kuv tuaj yeem kho cov lus qhia ntxiv.

Hu rau tam sim no