22 MVA 3 Phase Power Transformer-33/11 KV|Afrika Boroa 2025

01 Kakaretso

1.1 Tlhaloso ea Morero

Morero ona o kenyelletsa li-transformer tse peli tsa 20/22 MVA, 33/11 kV tse tharo-tse kentsoeng sebakeng sa bophahamo ba limithara tse ka bang 1,800 Afrika Boroa, moo mocheso oa selemo o tlohang ho -10 degrees ho ea ho +40 degrees . Moea o mosesaane sebakeng se phahameng o fokotsa bokhoni ba ho senya mocheso. Ho feta moo, ho feto-fetoha ho hoholo ha mocheso ho ka baka ho atolosoa ha mocheso le ho fokotseha, hammoho le khatello ea mochine, thepa. Ka hona, moralo o tlameha ho nahana ka lintlha tsena tse peli tsa tikoloho: bophahamo bo phahameng le ho fetoha ho hoholo ha mocheso.

Ho Ikamahanya le Boemo ba Tikoloho

Altitude Impact: IEC60076-2 e hloka pholiso e matlafalitsoeng kapa phokotso ea mojaro sebakeng se kaholimo ho limithara tse 1,000. Transformer e sebelisa pholiso e nyalisitsoeng ea ONAN/ONAF, e kopanyang pholiso ea oli ea tlhaho le moea o pholileng o thusoang ke fan ho ntlafatsa katleho ea phapanyetsano ea mocheso.

Phello ea Mocheso: Ha lithempereichara tse phahameng ({0}} dikirii), li-fan li matlafatsa mokhoa oa ho felisa mocheso ho netefatsa hore mocheso o nyolohang ha o fete moeli o boletsoeng.

Lintlha tsa Moqapi oa Bohlokoa

Bokhoni le Pholiso: Bophahamo bo lekantsoeng ke 20/22 MVA, 20 MVA ka mokhoa oa ONAN, bo eketseha ho fihla ho 22 MVA ka li-fan (ONAF bakeng sa 10% overload) e lumelletsoe. Ho pholisa ka motsoako o kopanyang ho netefatsa hore mocheso o lekane-mocheso o hodimo{7}}ka tikolohong e phahameng, ho kopana le ditlhoko tsa matla a IEC{8}} tsa methati tse ngata.

Boemo ba Voltage le Wiring: 33 kV / 11 kV, Dyn11 vector group (khokahanyo e phahameng ea voltage delta, khokahanyo ea motlakase o tlase oa Y, sebaka se sa nke lehlakore), se netefatsang-litlhokahalo tsa mekhahlelo e meraro le ho thea fatše. Mahlakore ka bobeli a sebelisa insulation ea LI200 (e mamella 200 kV impulse voltage le 70 kV AC e mamella voltage) ho etsa bonnete ba hore marang-rang a khahlano le matla a fokotsehileng a moea a dielectric libakeng tse phahameng.

Sesebediswa sa Mapheo le Tshitiso: Mapheo a koporo a kaonafatsa-bokgoni ba ho rwala ba bang le matla a makgutshwane- a potoloho, ha 14.29% e thibela mathata a hona jwale. Nakong ea ts'ebetso e ts'oanang, lehlakore la mantlha le na le 3-ea bobeli ea symmetrical stand current ea 21 kA, 'me lehlakore la bobeli le na le asymmetrical peak current ea 18 kA, e khonang ho mamella litšisinyeho tsa potoloho e khutšoane tse bapileng.

On-Molao oa Motlakase oa Motlakase: Setsi sa vacuum contactor OLTC se na le ±8 × 1.25% (kakaretso ±10%) taolo ea taolo ea motlakase. Ka lehlakoreng-e kentsoe, e thusa tšebetso le tlhokomelo, e netefatsa taolo e thellang ea motlakase nakong ea ts'ebetso.

Oli Dielectric and Insulation: Ho sebelisoa oli ea boleng bo holimo-e sireletsang liminerale e nang le matla a dielectric a Ho feta kapa a lekanang le 80 kV e sebelisoa, hammoho le{2}}mohaho o phahameng oa ho kenya letsoho ho netefatsa hore ho na le moeli o phahameng oa ho mamella voltage. Bophahamo bo phahameng bo na le tšusumetso e fokolang holim'a oli{4}e thehilweng; ho senyeha ha insulation ho bakoang ke moea o mosesaane haholo-holo ho lefshoa ke moralo oa lihlahla le lekhalo la moea.

Transformer ena ea mekhahlelo e 3 e na le lisebelisoa tse ngata ho netefatsa ts'ebetso e bolokehileng le e ts'eptjoang: "vacuum" e ka lehlakoreng -e kentsoeng ka har'a-changer (±8×1.25%) le se laolang motlakase o ikemetseng o boloka botsitso ba motlakase; thermometer ea boemo ba oli le thermometer e matsoelintsoeke e hlokomela ho phahama ha mocheso ka nako ea nnete; {{6}motlakase oa motlakase o phahameng o fana ka tšireletso e tšepahalang; desiccant le relay ea khase li thibela mongobo 'me li fana ka temoso ea pele ea liphoso tsa ka hare; sets'oants'o sa lehalima se phahameng{{7}se sireletsang lisebelisoa hore li se ke tsa senyeha ho feta tekano; Li-transformer tse 15 tsa hajoale li tšehetsa tekanyo, ts'ireletso le ts'ebetso e ts'oanang; le sebatli se kopantsoeng sa oli se thusa ho laola le ho sireletsa bongata ba oli, ha se ntse se ntlafatsa sebopeho le tšebeliso ea sebaka.

1.2 Tlhaloso ea Setsebi

22 MVA 3 phase power transformer specifications and data sheet

1.3 Litšoantšo

22 MVA 3 phase power transformer drawing le nameplate

02 Tlhahiso

2.1 Ntlha ea bohlokoa

The 20/22 MVA 3-phase power transformer core e entsoe ho latela ISO 60076. Lishiti tsa silicon tse bohareng li kopana le maemo a tšebetso ea motlakase le makenete. Ba fana ka tahlehelo ea mantlha e tlase le ts'ebetso e tšepahalang. Konokono ea boleng bo holimo e fokotsa tahlehelo ea matla joalo ka mocheso. Tahlehelo e tlase ea mantlha e thibela ho futhumala ho feteletseng, ho lelefatsa bophelo ba ts'ebeletso, le ho fokotsa litlhoko tsa sistimi ea pholileng.

2.2 Ho tsubella

Likhoele li entsoe ka-ka koporo ea boleng bo holimo. Ba latela litlhoko tse thata tsa moralo. Maqhubu a{{3}voltage Delta a ka mamellang boemo bo holimo{4}ho{5}ho{5}}mohato o mokhuts'oane-oa maqhubu a potoloho. E na le matla a matla a mochine. The low{9}voltage star winding ha e na lehlakore. Likhoele tsa koporo li na le maqeba a thata ka khatello e laoloang ea lera. Sena se tiisa hore esita le mocheso oa hona joale le o motle oa ho senya mocheso. Li-coil li fana ka ts'ebetso e tšepahalang le bophelo bo bolelele ba ts'ebeletso.

 

2.3 Lebokose la Terminal

Transfoma e tlase e na le{{0}seboloki sa oli se kopantseng switjha le likarolo tsa tanka tse kholo, tse arotsoeng ka karohano e kentsoeng switch ka lehlakoreng. Tanka e etsa tlhahlobo ea tiiso ea 30 kPa bakeng sa lihora tse 24 ntle le ho putlama. Lisebelisoa tsohle le litekanyo li kopana le lits'oants'o, tse fapaneng ka tlase ho 1 mm. Lipoleiti tsa tšepe li latela litekanyetso tsa naha 'me ha li na bofokoli, mafome, li ebola kapa ha li na mafome. Li-welds li otlolohile, li boreleli, li tšoana, 'me ha li na sekoli.

 

2.4 IP55 Terminal lebokose

Lebokose la terminal le entsoe ka poleiti ea tšepe e teteaneng ea 3mm mme e na le tšireletso ea IP55, e netefatsang sebopeho se matla le ho hanyetsa lerole le metsi. E na le matšoao a mocheso le oli bakeng sa ho hlahloba nako ea sebele-. Mofuthu oa 230V o fanoa ho thibela mongobo, o bohlokoa esita le Afrika Boroa, moo libaka tse ngata li omileng, empa libaka tse phahameng, linako tsa lipula, kapa libaka tse lebōpong la leoatle li ka baka condensation. Lebone la LED lea buleha ha lemati le butsoe, le fana ka tlhahlobo e bonolo.

 

2.5 Ho{1}}Load Tap Changer

Transformer ea motlakase e na le vacuum-mofuta oa On{1}}Load Tap Changer. E na le maemo a 17 a lipompo tse nang le taolo ea mehato ea 1.25%. Maemo a motlakase ke 29,700/11,000 V (-10%) ho isa ho 36,300/11,000 V (+10%). E fana ka taolo e nepahetseng ea motlakase nakong ea liphetoho tsa mojaro. OLTC e sebetsa ka mokhoa oa matsoho le oa othomathike. OLTC e ts'ehetsa mekhoa ea matsoho le ea othomathiki, e ka sebetsa ka ho tsamaisana le lisebelisoa tse ling, 'me e fana ka bokhoni ba taolo ea hole.

 

2.6 Kopano ea ho Qetela

 

Ka mor'a hore motsoako oa transformer le windings li bokelloe, karolo e sebetsang e kenngoa ka ontong ea ho omisa. Ka mor'a ho omisa, ea phahamisoa ebe e kenngoa ka tanka ea oli. Transfoma ena ea mekhahlelo e 3 e na le lisebelisoa tse ngata ho tlatselletsa tse tloaelehileng, joalo ka -ho fetola lipompo tsa thepa, sesupo sa mocheso oa oli, sesupo sa mocheso o tsoelipanang, Buchholz relay, fene, le{4}}sekontiri se le seng sa oli. Lisebelisuoa tse ling li kenyelletsa moea o phefumolohang,{6}}mehalima ea matla a phahameng a nang le litšehetso, le li-transformer tse 15 tsa hajoale. Ka mor'a hore lisebelisoa tsohle li kenngoe, ts'ebetso ea kopano e phethoa ka ho tlatsa oli le ho tiisoa, likhokahano tsa motlakase le liteko, le ho hlahloba ponahalo le matšoao.

 

 

03 Teko

Teko ea Teko le Teko e Tloaelehileng

Tekanyetso e Sebedisitsweng

• IEC 60076-1: 2011 Power Transformers - Karolo ea 1: Kakaretso
• IEC 60076-3: 2013 Power Transformers - Karolo ea 3: Maemo a insulation, liteko tsa dielectric le ho tlosoa ha ka ntle moeeng
• IEC 60076-7:2018 Power Transformers – Karolo 7: Tataiso ea ho roala bakeng sa liminerale{4}}li-transformer tse qoelisoang ka oli
• Tse ling li bua ka taolo ea tekheniki

1. Ho hlahloba ha Core le Frame Insulation bakeng sa Liquid Immersed Transformers tse nang le Core kapa Frame Insulation.
2. Hlahloba Voltage Ratio le Vector Group
3. Tekanyo ea hona joale ea Transformer
4. Tekanyo ea Maqhubu a Khanyetsano
5. Tekanyo ea Ha ho-Litahlehelo tsa Mojaro le Che{2}}moroalo oa Hona joale
6. Induced Voltage E mamella Teko
7. Tekanyo ea Impedans Voltage le Tahlehelo ea Mojaro
8. Ho{1}}load Tap Changers – Operation Test
9. Teko ea Voltage e sebelisitsoeng (AV)
10. Axiliary Wiring Insulation (AuxW)
11. Teko ea Tiiso
12. Tlhahlobo ea oli

04 Ho paka le ho Romela

4.1 Ho paka

 

4.2 Ho tsamaisa thepa

 

05 Sebaka le Kakaretso

Ka 2025, re ile ra isa li-transformer tse peli tsa 20/22 MVA tsa mekhahlelo e meraro Afrika Boroa. Li-transformer tsena li etselitsoe ho sebetsa ka botšepehi libakeng tse phahameng le ho pholletsa le mefuta e mengata ea mocheso.

Re na le boiphihlelo mererong ea li-turnkey tsa motlakase mme re fana ka lisebelisoa tse fapaneng, ho kenyeletsoa li-transformer tsa motlakase, CTs, PTs, li-circuit breakers, switchgear, GIS, le tse ling. Li-transformer tsa rona tsa boleng bo holimo- li netefatsa ts'ebetso e ts'eptjoang le e sebetsang hantle tikolohong ea Afrika Boroa e hlokang matla. Ikopanye le rona kajeno ho buisana ka litlhoko tsa tharollo ea motlakase sebakeng sa heno.