750 KVA Three Phase Distribution Transformer-11/0.415 KV|Papua New Guinea

 

 

01 Kakaretso

1.1 Tlhaloso ea Morero

Lintlha tsa Bohlokoa le Maemo a Ts'ebeliso

Bokhoni bo Sebetsang le Tekanyetso ea Voltage- Ka matla a lekantsoeng a 750kVA, senatransfoma ea kabo ea mekhahlelo e meraroe loketse kabo ea matla a feme, phepelo ea motlakase ea sechaba sa bolulo, kapa libaka tse kholo tsa ho fumana motlakase bakeng sa meaho e meholo ea khoebo. E theola hantle 11kV high voltage ho 0.415kV (tharo-mohato oa bone-terata) ka lehlakoreng le tlase-voltage, e fana ka tšehetso e tiileng bakeng sa maemo a fapaneng a ts'ebeliso.

Ts'ebetso e tsitsitseng ea Motlakase– Sehlahiswa amohela aDyn11sehlopha sa li-vector. Mokhoa ona oa ho hokahanya o na le bokhoni bo matla ba ho mamella meroalo e sa leka-lekanang 'me o hatella ka katleho tšilafalo ea boraro phepelong ea motlakase, e etsa hore e tšoanelehe ka ho khetheha bakeng sa tikoloho ea bolulo le liofisi tse nang le meroalo e mengata{1}} ea mekhahlelo e le 'ngoe. Ka tahlehelo ea boima ba 10.3kW ho 75℃le tahlehelo e se nang moroalo feela 1.1kW, transformer e netefatsa tšebeliso e tlase ea matla nakong ea nako e telele ea standby kapa{6}}mosebetsi o bobebe.

Reliable Voltage RegulationTransformer e na le-load tap changer (NLTC) e se nang lisebelisoa. Ha o felloa ke matla, basebelisi ba ka fetola motlakase ka har'a sebaka sa ± 2 × 2.5% ho lefella ho theoha ha motlakase ho bakoang ke lithapo tse telele tsa phetisetso. Ha ho bapisoa le lintho tse rarahaneng ho-load tap changer (OLTC), moralo ona ha o fokotse litšenyehelo tsa tlhahiso feela empa o felisa le tlhokeho ea likarolo tse ling tsa motlakase, ho ntlafatsa moruo le nako e telele haholo.

Taolo e Phahameng ea Thermal & Moralo oa Tanka

Transformer e sebelisa pholiso ea ONAN (Oil Natural Air Natural). E itšetlehile ka phepelo ea tlhaho ea oli ea transformer - ho phahama ha oli e chesang le ho teba ha oli e batang - 'me e qhala mocheso ka mapheo a masenke kapa li-radiator ntle le li-fan kapa lipompo tsa oli. Moralo ona o ntlafatsa tlhokomelo haholo{{2}ts'ebetso ea mahala le ho ts'epahala tlas'a maemo a feteletseng a tikoloho. Ho feta moo, sesebelisoa sa transformer se na le aoli e tiisitsoeng ka botlalo{0}ka mohaho o tletseng. Tanka e atolositsoeng ea masenke e arola hantle moea le mongobo o kantle, e lelefatsa haholo bophelo ba ts'ebeletso ea oli e sireletsang le potoloho ea tlhokomelo eohle ea transformer.

Kaho ea Kantle e Mathata & Tšireletso ea Tšireletso

Transformer ena e etselitsoe tikoloho e thata ea kantle, e khonang ho sebetsa-o tsitsitseng nako e telele sebakeng se bophahamo ba limithara tse 1000 le thempereichara ho tloha ho -25 degrees to 40 degrees . Ka bobeli lihlahla tsa HV le tsa LV li entsoe ka porcelain ea ka ntle{{6}e nang le li-cable boxes tse kentsoeng moea ho netefatsa tšireletso e sireletsehileng le sebaka se lekaneng sa ho koala. Sehlopha se felletseng sa lisebelisoa - ho kenyeletsoa sekala sa boemo ba oli se sebetsang ka bongata se nang le khatello ea khatello, sesupo sa mocheso oa oli, relay ea Buchholz, le li-terminals tse tšepahalang tsa lefats'e - li theha sistimi ea ts'ireletso ea mekhahlelo e mengata, e fanang ka alamo e nakong kapa khatello ea khatello ha ho hlaha phoso e ka hare.

 

 

 

1.2 Tlhaloso ea Setsebi

750 kVA mefuta e meraro ea likarolo tsa kabo ea mofuta le leqephe la data

 

1.3 Litšoantšo

750 kVA sets'oants'o sa sets'oants'o sa kabo ea mekhahlelo e meraro le boholo.

 

 

02 Tlhahiso

2.1 Ntlha ea bohlokoa

 

2.2 Ho tsubella

Sisteme ea matsoelintsoeke e fetola matla a khoheli hore e be matla a motlakase. Boleng ba eona bo ama ka kotloloho matla a potoloho e khuts'oane, ts'ebetso ea mocheso, le bots'epehi.

Netefatso ea Paramethara (e fuoe lintlha tse 750 kVA)

Ntho ea Teko	Boleng bo Lekanyelitsoeng	Moralo / Tlhokahalo e Tloaelehileng	Kahlolo
Ho kheloha ha tekanyo ea motlakase	-0.11% ho isa ho +0.00%	IEC 60076-1 e lumella ± 0.5%	✔ Feta
HV winding resistance resistance	Ka tlase kapa ho lekana le 0.14%	Ka tlase kapa ho lekana le 2%	✔ Ho molemo ho feta
LV winding resistance resistance	1.03%	Ka tlase kapa ho lekana le 2%	✔ Feta

Phapang e phahameng ea sekhahla sa motlakase ke -0.11% feela, hantle ka har'a moeli oa IEC 60076‑1 oa ± 0.5% (tlaleho ea tekolo leqepheng la 5). Ho se leka-lekane ha 0.14% (HV) le 1.03% (LV) ho ka tlase haholo ho meeli ea indasteri, ho bonts'a boleng bo botle ba matsoelintsoeke le ts'epahalo e kopaneng.

Tlhahisong ea sejoale-joale, ho sebelisoa mechini ea othomathiki kapa ea semi-automatic ho laola tsitsipano ea terata ka nepo, ho tsamaisana le maemo le boholo. Ka mor'a hore ho be le matsoelintsoeke, li-pre-compaction le sebōpeho li sebelisoa ho matlafatsa matla a mochine, ho netefatsa botšepehi tlas'a potoloho e khutšoanyane le ea mocheso.

 

2.3 Tanka

 

2.4 Kopano ea ho Qetela

Kopano ea ho qetela e kopanya likarolo tsa ka hare, lisebelisoa, le mekhoa ea ho tiisa. Yuniti ena e kenyelletsa:

Sesebedisoa	Qty	Mosebetsi
Mapheo a koaletsoeng	1 sete	Pholiso le matšeliso a bophahamo ba oli
Sekhahla sa oli / sampling valve	1	Tlhokomelo ea oli le sampole
Tekanyetso ea boemo ba oli e nang le mesebetsi e mengata	1	Ka mosebetsi oa khatello ea khatello
Pontšo ea mocheso oa oli	1	Tlhokomelo ea mocheso oa oli
Buchholz relay	1	Tšireletso ea phoso ka hare

Kopano ea sejoale-joale e laola ka thata boleng ba weld, likhokahano tsa flange, le botšepehi ba gasket ho thibela ho lutla. Lisebelisoa li koahela ts'ireletso ea bohlokoa le mesebetsi ea ho beha leihlo, ho netefatsa ts'ebetso e sireletsehileng ea kantle.

 

 

03 Teko

Transformer ea mekhahlelo e meraro e fetile liteko tsohle tsa tloaelo tsa IEC 60076 pele li romelloa. Kakaretso ea liphetho:

3.1 Insulation Resistance (E kholo ho feta kapa e lekana le 86.8 GΩ - ho feta litlhoko tse tloaelehileng)

Boemo ba ho Lekanya	Insulation Resistance (GΩ)	Sephetho
HV ho LV le lefats'e	103	Feta
LV ho HV le lefats'e	123	Feta
HV+LV lefatšeng	86.8	Feta

3.2 Teko e arohaneng ea Power-frequency Withstand Test

Boemo ba Teko	Matla a motlakase (kV)	Nako (s)	Sephetho
HV - lefatše + LV	28	60	Feta
LV - lefatše + HV	3	60	Feta

3.3 Teko ea Thibelo e Felletseng ea Voltage (ACSD)

Voltage e sebelisitsoeng (lehlakore la LV)	E susumetsoa ke multiple	Hangata (Hz)	Nako (s)	Sephetho
0.83 kV	2.0	150	40	Feta

3.4 Ha ho Tahlehelo le Ha ho Mojaro Hona Joale

Boemo ba ho Tlanya	Ha ho na moroalo oa Hona Joale (%)	Tahlehelo ea Ha ho Mojaro (kW)	Sephetho
3	0.53	0.942	Feta

3.5 Tšitiso ea potoloho e khuts'oane le tahlehelo ea mojaro (e lokiselitsoeng ho isa ho likhato tse 75)

Ho tsokotsa moea	Boemo ba ho Tlanya	Impedans (%)	Tahlehelo ea Mojaro (kW)	Sephetho
LV	3	4.59	9.644	Feta

3.6 Teko ea Tiiso ea Khatello

Khatello e Sebelisitsoeng	Nako	Sephetho
15 kPa	Lihora tse 24	Ha ho dutla, ha ho tshenyo

Qetello:Liteko tsohle tse robong tse fetisitsoeng tekong ea pele, li kopane ka botlalo le IEC 60076-1:2011. Liphetho li tiisa ho ts'epahala ha moralo, haholo ho tiiseng, ho nepahala ha karo-karolelano ea motlakase, le matla a dielectric.

 

 

04 Ho paka le ho Romela

4.1 Ho paka

Ho paka ho latela mekhoa e tloaelehileng ea ho romela thepa bakeng sa li-transformer tse qoelitsoeng ka oli. Setsi sena se romelloaka oli- ho boloka ho kenngoa ha ka hare le ho thibela ho kenella ha mongobo nakong ea ho tsamaea le ho tlosoa ha meetlo. Litekanyo tse hakanyetsoang: 2100 × 1300 × 1890 limilimithara. Kakaretso ea boima ba 'mele e ka ba. 2200 kg (setaelo sa ho qetela se netefatsoa). E loketse bakeng sa ho roala lintho tse tloaelehileng tsa maritime le tsa mobu.

 

4.2 Ho tsamaisa thepa

• Boima ba ho tsamaisa thepa- E tla netefatsoa nakong ea setšoantšo sa ho qetela; e tsamaisoang ka oli.
• Sehatisi sa tšusumetso- Ha e tlamehe, empa e ka kengoa sehatisi sa tšusumetso ea motho oa boraro ha o e kopa.
• Tsamaiso ea kantle ho naha- Moralo le lisebelisoa li latela IEC 60076, e tsamaellana le litlhaloso tse ngata tsa grid ea lefatše.
• Thepa e kotsi- Oli ea Transformer ke lisebelisoa tse kotsi tsa Sehlopha sa 9; Liphutheloana tse nepahetseng tsa IMDG le phatlalatso lia lateloa bakeng sa ho romela thepa kantle ho naha.
• Likhetho tsa ho romella- E ka romelloa ka oli e tlatsitsoeng kapa e tšetsoe ka oli / naetrojene - e koetsoe joalo ka ha konteraka e hloka.

 

 

05 Kakaretso - Tiisetso ea Boleng le Lintlha-kholo tsa Tlhahiso

5.1 Kamoo re Tiisetsang Boleng ba

Tiisetso ea boleng e qala ho tloha ho nkeloa thepa e tala ho isa ho thomello ea ho qetela. Ho etsoa ha li-transformer tsa sejoale-joale ho hlophisitsoe ka mekhahlelo e meraro: tlhahiso ea likarolo, kopano ea karolo e sebetsang, le kopano ea ho qetela/teko. Transformer ena e latela litaelo tse thata:

• Tlhahlobo e kenang- Tšepe ea silicon e khonang ho kenella ka mokhoa o phahameng, terata e tsoelipanang ea aluminium, le lisebelisoa tsa tšireletso li hlahlojoa ha li fihla.
• Taolo ea ts'ebetso- Mehato ea bohlokoa (ho tsitsipana / ho lokisoa, likheo tsa mantlha tsa stacking, vacuum drying) li na le libaka tsa tlhahlobo tsa boleng.
• Phekolo ea oli & ho tiisa- Ho tlatsoa ha oli ea vacuum le degassing, chromatography ea oli ho netefatsa thepa ea dielectric; tlhahlobo e tiileng ea tiiso ka mor'a kopano.
• Netefatso ea teko- Tlatsa liteko tsa tloaelo tlasa IEC 60076, ka tlaleho e felletseng ea tlhahlobo ho netefatsa ts'ebetso.

Mehato ena e netefatsa tlhahiso e tsitsitseng, botsitso ba motlakase, le ho tšoarella ha nako e telele tšimong.

 

5.2 Lintlha-kholo tsa Tlhahiso

• Moralo o tiisitsoeng oa oli e felletseng- E fokotsa oxidation ea oli, e eketsa bophelo ba ts'ebeletso.
• Tahlehelo e tlase, ts'ebetso e phahameng ea mantlha- Ha ho tahlehelo ea mojaro feela 0.942 kW (e lekantsoeng), ha ho na moroalo hona joale 0.53%.
• Netefatso e matla ea tlhahlobo- Liteko tsohle tse robong tsa tloaelo li fetile lekhetlo la pele; ho hanyetsa ho kenella ho fihla ho 123 GΩ, ho feta litlhoko tse tloaelehileng.
• Sete e felletseng ea lisebelisoa- Tekanyetso ea boemo ba oli e sebetsang ka bongata (e nang le khatello ea khatello), relay ea Buchholz, sesupo sa mocheso oa oli - ts'ebetso e sireletsehileng ea kantle.
• Tumellano ea IEC 60076- E etselitsoe le ho lekoa ho IEC 60076; mofuta oa boikhethelo / liteko tse khethehileng tse fumanehang ka litšenyehelo tse eketsehileng.
• Tiiso ea tikoloho e tšepahalang- Teko ea khatello ea lihora tse 24 ‑ 15 kPa - ha ho na ho lutla, ha ho na tšenyo.