20 MVA Fais Fab Transformer-66/11 kV|South Africa 2025

01 General

1.1 Project Background

20 MVA roj immersed hwj chim transformer tau xa mus rau South Africa nyob rau hauv 2025. Lub zog ntsuas ntawm lub transformer yog 20 MVA nrog ONAN / ONAF txias. Thawj qhov hluav taws xob yog 66 kV nrog ± 6 * 1.67% tapping ntau yam (OLTC), qhov nruab nrab voltage yog 11 kV, lawv tsim ib pawg vector ntawm YNd11.

OLTC yog Y- qauv kev sib txuas nrog cov roj relay ntawm qhov hloov thiab kev sib cuag ntawm cov roj relay. Lub 20 MVA fais fab mov transformer yog nruab nrog ib tug xob ntes bracket los tiv thaiv cov cuab yeej los ntawm xob laim shocks. Nruab nrog winding tus pas ntsuas kub nrog lub tswb mus txawv tebchaws thiab tam sim no transformer xav tau rau winding tus pas ntsuas kub. Roj theem tus pas ntsuas kub nrog lub tswb mus ncig teb chaws thiab roj qib ntsuas nrog ntsuas roj qis. Tsis tas li ntawd, lub thawv davhlau ya nyob twg thiab lwm qhov chaw tau nruab nrog lub tshuab cua sov, thiab sab qis voltage yog nruab nrog lub thawv hluav taws xob tsis tshua muaj hluav taws xob los xyuas kom muaj kev ua haujlwm zoo nyob rau hauv ib puag ncig kub. Cov khoom siv hluav taws xob tswj hluav taws xob tswj hluav taws xob 110V, hloov tsav lub cev muaj zog hluav taws xob hluav taws xob 220V, lub tshuab rhaub hluav taws xob hluav taws xob 220V.

1.2 Technical Specification

20 MVA roj immersed hwj chim transformer specifications hom thiab cov ntaub ntawv ntawv

1.3 Cov duab kos

20 MVA roj immersed hwj chim transformer daim duab kos duab thiab loj.

02 Kev tsim khoom

2.1 Core

Cov tub ntxhais muaj cov qauv laminated, muaj ntau cov ntawv nyias nyias uas sib dhos ua ke. Lub thickness ntawm txhua daim ntawv yog xam precisely los xyuas kom meej qhov pom kev poob txo thaum withstanding fluctuating ua hauj lwm sib nqus flux. Cov tub ntxhais yog tsim los ua lub kaw sib nqus sib nqus, kom ntseeg tau tias cov hlau nplaum sib nqus tuaj yeem ua haujlwm zoo nyob rau hauv cov tub ntxhais, yog li txhim kho kev ua haujlwm ntawm transformer. Lub kaw sib nqus hluav taws xob pab txo qis qhov sib nqus sib nqus thiab txhim kho kev ua haujlwm tag nrho.

2.2 Cua txias

Lub nruam winding yog hais txog cov coils nyob rau hauv lub winding raug mob yam tsis muaj kev cuam tshuam los yog segmentation. Cov qauv no tso cai rau cov tam sim no los ua ib qho chaw sib nqus ruaj khov nyob rau hauv winding, txo cov hluav taws xob poob thiab qhov kev pheej hmoo ntawm kev ua txhaum los ntawm cov xov hlau tawg lossis cov ntsiab lus txuas. Vim qhov kev tsim kho tas mus li, nws ua kom muaj kev faib tawm tam sim no ntau dua, txo qhov tsim ntawm qhov kub thiab txhim kho tag nrho cov txiaj ntsig ntawm transformer.

2.3 Tank

Tsim cov ntawv txiav steel los ntawm kev khoov thiab folding los tsim lub tank lub plhaub sab nrauv. Siv MIG los yog TIG vuam cov txheej txheem los mus tas li welding cov khoom, tswj cov vuam zoo kom tiv thaiv kev xau yav tom ntej. Ntxuav lub welded tank kom tshem tawm cov oxides thiab roj residues. Siv cov tshuaj tiv thaiv corrosion- tiv taus primer thiab topcoat rau lub tank sab nrauv los txhim kho kev tiv thaiv corrosion thiab huab cua. Laum qhov tsim nyog ntawm lub tank txhawm rau txhim kho qhov nkag, qhov hluav taws xob, lub tshuab nqus pa, ntsuas roj qib ntsuas, ntsuas ntsuas kub, thiab lwm yam khoom siv los xyuas kom meej kev ua haujlwm. Nruab cov qauv kev txhawb nqa thiab cov khoom sib txuas kom ntseeg tau tias lub tank ruaj khov thaum ua haujlwm.

2.4 Kev sib dhos zaum kawg

Winding Manufacturing thiab Installation: Nruab qhov qis voltage winding ntawm cov tub ntxhais ua ntej, ua raws li cov high voltage winding.

Lub cev sib dhos: Muab cov tub ntxhais thiab winding rau hauv lub tank transformer thiab kho lawv nyob rau hauv txoj hauj lwm. Nruab kais hloov pauv thiab lwm yam khoom siv sab hauv.

Nqus thiab roj filling: Tshem tawm cov cua ntawm cov coils thiab lub tank los ntawm lub tshuab nqus tsev los tsim lub tshuab nqus tsev. Sau lub tank nrog roj transformer kom ntseeg tau tias rwb thaiv tsev thiab pab txias.

Accessory Installation: Txhim kho cov khoom siv sab nraud xws li cov cua txias, cov khoom txuag roj, cov roj relays, thiab lub siab nyem li qub.

03 Kev Xeem

1. Kev ntsuas cov roj yaj hauv cov kua dielectric los ntawm txhua qhov sib cais cov roj cais tshwj tsis yog diverter hloov chaw

2. Kev ntsuas qhov sib piv ntawm qhov hluav taws xob thiab xyuas cov theem hloov chaw

3. Kev ntsuas ntawm winding kuj

4. Xyuas Cov Tub Ntxhais Thiab Ncej Rwb Thaiv Tsev Rau Cov Kua Immersed Transformers Nrog Core lossis Ncej Rwb thaiv tsev

5. Kev ntsuas ntawm DC rwb thaiv tsev tsis kam ntawm txhua qhov cua rau lub ntiaj teb thiab nruab nrab ntawm qhov cua

6. Kev txiav txim siab ntawm capacitance windings rau lub ntiaj teb thiab nruab nrab ntawm windings

7. Applied Voltage Test (AV)

8. Kev ntsuas tsis muaj-load poob thiab tam sim no

9. Induced Voltage Withstand Test

10. Kev ntsuas luv- Circuit Court impedance thiab Load Poob

11. Kev ntsuas cov roj yaj hauv cov kua dielectric los ntawm txhua qhov sib cais cov roj cais tshwj tsis yog hloov pauv hloov chaw

12. Kev Xeem Leak Nrog Siab Rau Cov Kua Dej -Immersed Transformers (Tightness Test)

04 Packing thiab Shipping

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shipping

05 Site thiab Summary

Ua tsaug rau koj siv sijhawm los kawm txog peb cov roj -immersed power transformers. Raws li lub hauv paus tseem ceeb hauv kev xa tawm hluav taws xob thiab kev faib tawm, peb cov khoom muaj npe nrov rau lawv qhov kev ua tau zoo tshwj xeeb, kev ruaj ntseg ruaj khov, thiab kev rwb thaiv tsev zoo thiab muaj peev xwm ua kom txias. Txawm hais tias nyob rau hauv cov chaw lag luam lossis cov chaw lag luam, cov roj-immersed transformers tuaj yeem ua tau raws li qhov xav tau ntau lub zog, ua kom muaj kev nyab xeeb thiab ua haujlwm zoo ntawm cov tshuab. Xaiv peb txhais tau tias xaiv cov cuab yeej siv siab heev, kev txhawb nqa kev tshaj lij, thiab kev saib xyuas cov neeg siv khoom tas li. Peb tos ntsoov yuav koom tes nrog koj txhawm rau txhim kho kev ntseeg siab thiab kev ua haujlwm ntawm koj lub zog. Ua tsaug rau koj qhov kev mloog thiab kev ntseeg siab!