220kV Transformer Inter-Coil Main Insulation Gap: Kuongorora Munda weMagetsi uye Maitiro Ekuvandudza

Nhanganyaya

Munyaya yekufambiswa kwesimba remagetsi ane simba rakawanda, matransformer e220kV anoita basa rakakosha mukuona kuti simba rinoparadzirwa zvakanaka. gap guru rekudzivirira kupisaPakati pemawinding etransformer chimwe chezvinhu zvakakosha pakugadzira, zvichikanganisa zvakananga kuvimbika kwetransformer, kugara kwenguva refu, uye mashandiro ayo. Sevatungamiriri vemusika mune tekinoroji yetransformer, tinoziva kuti dhizaini yepamusoro yekudzivirira kupisa inonyanya kukosha pakutsungirira kushushikana kwakanyanya kwemagetsi, kusanganisira ma voltages anoshanda nguva dzose, mheniuye kushanduka kwemasimba.

Chinyorwa chino chinoongorora nzira dzekuongorora magetsi dzakaomarara uye nzira dzekuvandudza dzinoshanda dze220kV transformer inter-coil main insulation gaps. Nekushandisa matekinoroji epamusoro ekutevedzera uye misimboti yekugadzira itsva, tinogona kusimudzira zvakanyanya mashandiro e transformer insulation, tichiona kuti mashandiro akanaka munzvimbo dzinonyanya kuoma.

Nheyo dzeMain Insulation mu220kV Transformers

Mukana mukuru wekudzivirira pakati pemawindings mu220kV transformers unoshanda sechipingamupinyi chikuru che dielectric, chinodzivirira kuparara kwemagetsi pakati pema coil ane voltage yepamusoro neasina voltage. Iyi sisitimu yekudzivirira haifanire kungotsungirira mamiriro ekushanda akajairwa chete asiwo akasiyana-siyana. mamiriro ezvinhu emagetsi akawandisazvinoitika panguva yekukanganiswa kwegrid.

Mukushandiswa kwe220kV, gap rekudzivirira kupisa rinowanzo shandiswa sisitimu yezvipingamupinyi zvakawandaine masirinda ebhodhi rekudzvanya kana machira anopatsanura mukaha kuita migero midiki yemafuta. Nzira iyi inovandudza zvakanyanya voltage yekutanga yekuburitsa zvishoma(PDIV) uye inodzivirira kuumbwa kwezvisungo zvinofambisa mhepo pakati pemawindings. Dhizaini huru inotevera musimboti wekuti "chubhu yepepa yakatetepa, mukaha mudiki wemafuta", uko mabhodhi ekudzvanya anowanzova 2mm ukobvu, uye mikaha yemafuta pakati pezvisungo inotangira pa6-10mm.

Kugoverwa kwemagetsi mukati memipata iyi hakuna kufanana zvachose, kushushikana zvakanyanyazvichiitika pamipendero inomonereka, pamakona emuchina wekupinza, uye panosangana ma insulation. Pasina kugadziriswa kwakakodzera, nzvimbo idzi dzine simba guru dzinogona kutanga mabasa ekuburitsa mvura zvishoma, zvichikonzera kudzikira kwe insulation uye kutadza kushanda zvakanaka.

Matekiniki Ekuongorora Munda Wemagetsi

Kutevedzera Nzira Yekupedzisira yeElement (FEM)

Dhizaini yemazuva ano yekudzivirira kupisa inonyanya kuvimba ne ongororo yezvinhu zvakaganhurirwa(FEA) yekuongorora nzvimbo yemagetsi chaiyo. Nekupatsanura geometry yekudzivirira kuita zviuru zvezvinhu zvakasiyana, FEM inogona kuverenga kugoverwa kunogona kuitikauye simba remundanekururama kunoshamisa. Kune ma transformer e 220kV, ongororo iyi inowanzo tarisa munzvimbo nhatu dzakakosha: kuputira kwekumusoro, chikamu chepakati pakati pemawindingsuye kudzivirira kudzika kwepasi.

Kutevedzera kwedu kunoratidza kuti simba remagetsi rakanyanya kuwanda mumatransformer e220kV rinowanzoitika pamagetsi. makona emukati mepamusoroyemagetsi ane simba guru, kunyanya pedyo nezvikamu zvemagumo emutsetse. Munguva yekuedzwa kwemheni (1050kV yemasisitimu e220kV), nzvimbo idzi dzinogona kuona simba remunda richidarika 8-9kV/mm, zvichisvika pamiganhu yekuputsika kwezvinhu zvinodzivirira.

Kuzivikanwa kweNzvimbo Dzinonetsa Zvakakomba

Kuburikidza nekuongorora kwakazara kwemunda wemagetsi, takaona nzvimbo dzinoverengeka dzakakomba dzinoda kutariswa zvakanyanya mumatransformer e220kV:

• Nzvimbo dzinotenderera: Makona akapinza pamipendero inomonereka anoita kuti pave nekuwanda kwakawanda mumunda, zvichiita kuti pave nenzira dzakanyatsokodzera dzekuyera.
• Kubatana pakati pekudzivirira kwakasimba uye kwemvura: Hunhu hwakasiyana hwe dielectric hwe pressboard ne oiri hunoita kuti field intensification painterfaces dzavo.
• Nzvimbo dzekubuda nadzo dzinotungamira: Nzvimbo dzekuchinja uko ma lead ane voltage yepamusoro anobuda uye ma windings anopa kugoverwa kwakaoma kwemunda kunoda kuongororwa kwemativi matatu.

Kune ma transformer e 220kV, simba guru remagetsi rinowanzoonekwa muma discs ekutanga ari pedyo ne line end uye panzvimbo dzinosangana ma discs ari pakati pe interleaved ne ordinary panguva ye impulse conditions. Nzvimbo idzi dzinoda matanho ekudzivirira kupisa kuti dzisakundikana nguva isati yakwana.

Maitiro Ekuvandudza Mahara Makuru Ekudzivirira

Kugadzirisa Geometric

Kuumba maerekitirodhiinomiririra imwe yenzira dzinoshanda zvikuru dzekuvandudza kugoverwa kweminda. Nekutsiva makona akapinza ne mapurofayiri akakombamauye kuita maerekitirodhi etoroidal, tinogona kuderedza simba guru remumunda nekusvika 30-40%. Kune ma transformer e220kV, izvi zvinosanganisira:

• Mhete dzekupedzisira dzisingachinji(SER) pama terminals ekumonera kuti pave nema gradients akatsetseka.
• Mhete dzemakonaine ma profiles anoenderana nemitsetse ye equipotential, zvichideredza zvakanyanya kushushikana kwe tangential pamusoro pe pressboard.
• Makoni ekushushikanapanzvimbo dzakakosha dzekutarisa musiyano wemunda uye kuderedza kuwanda.

Kugadziriswa kwenzvimbo yekukombama kwakakosha zvikuru - kuwedzera nzvimbo yekona yemaconductors nema static rings kunogona kuderedza zvakanyanya kusimba kwenzvimbo (simba renzvimbo ∝ 1/radius).

Zvinhu Zvekudzivirira Zvepamusoro

Kusarudzwa kwezvinhu kunoita basa guru mukusimudzira mashandiro ekudzivirira kupisa. Matransformer edu e220kV anoshandisa:

• Bhodhi rekudzvanya rine huwandu hwakawandaine kugadzikana kwakavandudzwa kwehukuru uye simba repamusoro re dielectric.
• Mapepa akagadziridzwa nekupisaizvo zvinopa kutsungirira kwakanyanya kwekupisa, zvichichengetedza hunhu hwe dielectric pakupisa kwakakwirira.
• Zvinhu zvakavandudzwa neNanocompositeapo nanoparticles (SiO₂, Al₂O₃) inowedzerwa mu epoxy kana oiri inowedzera simba re dielectric ne20-30% uku ichivandudza kufambisa kwekupisa.

Zvinhu izvi zvepamusoro zvinobvumira magadzirirwo ekudzivirira akatetepa ukuwo zvichichengetedza kana kutovandudza kuvimbika. Semuenzaniso, kushandiswa kwe nanocomposite insulation systems kunogona kuwedzera hupenyu hwekudzivirira ne20-30% zvichienzaniswa nezvinhu zvemazuva ose.

Kugadziriswa kweSisitimu yeInsulation

Kugadzirisa kurongeka kwezvikamu zvekudzivirira muviri kunounza shanduko huru:

• Masisitimu ekudzivirira akarongwauko ukobvu hwekudzivirira hunosiyana zvichienderana nekugoverwa kwemagetsi pamwe nekutenderera.
• Kugadziriswa kwekuisa zvipingamupinyikushandisa ongororo yeFEM kuona nzvimbo dzakanakisa dzebhodhi rekudzvanya dzinoderedza kushushikana kwakanyanya kwemukana wemafuta.
• Saizi yemugero wemafutaiyo inoenzanisa zvinodiwa nemagetsi (mipata midiki yePDIV yakakwira) nezvinodiwa zvekutonhodza (kuyerera kwemafuta kwakakwana).

Pamatransformer e220kV, takaona kuti matekiniki ekumonera mapapiro akasiyananekuwedzera kwehuwandu hwema "percentages" ari pamusoro pe65-70% zvinovandudza zvakanyanya kugoverwa kwe "impulse voltage", zvichideredza kushushikana pama "discs" ekutanga kusvika ku50% zvichienzaniswa nemagadzirirwo ekare.

Chidzidzo Chemuenzaniso: Kubudirira Kuitwa muTransformer ye220kV

Purojekiti yedu yazvino inosanganisira transformer ye220kV ine impedance high-impedance inoratidza kushanda kwemaitiro aya ekuvandudza. Dhizaini yekutanga yakaratidza kuwanda kwemagetsi (kusvika 9.5kV/mm) mugedhi guru rekudzivirira pakati pemagetsi ane voltage yakawanda nemagetsi mashoma, kunyanya pedyo nemagumo emagetsi.

Kuburikidza neongororo yeFEM inoitwa kakawanda tichishandisa software yakasarudzika (HSSSM), takaisa purogiramu yakazara yekuvandudza:

1. Mhete yemagetsi yakagadziriswazveine curvature uye nzvimbo yakagadziridzwa.
2. Mhete dzekona dzekuwedzerapamagumo ekumonereka kuti ugovanise huwandu hwemafuta uye kuwedzera simba remvura inotsvedza.
3. Kurongeka kwezvipingamupinyi zvakagadziriswakugadzira mipata midiki, yakafanana yemafuta (6-8mm) pachinzvimbo chemipata mikuru yekutanga (12-15mm).

Mhedzisiro yacho yaishamisa: simba guru remunda rakaderera kusvika pa6.2kV/mm (kuvandudzwa kwe35%), nekupararira kwakafanana kwemunda mukati mechimiro che insulation. Transformer yakagadziriswa yakapasa bvunzo dzese dzenguva dzose uye dzemhando, kusanganisira power frequency inodzivirira voltage (460kV kweminiti imwe) uye lightning impulse (1050kV), nechikamu chekubuda kwemhepo nguva dzose chiri pasi pe10pC.

Kufunga Nezvekugadzira uye Hunhu

Kunyangwe dhizaini yepamusoro-soro haishande kana pasina mitemo chaiyo yekugadzira. Chirongwa chedu chekusimbisa hunhu hwe 220kV transformer insulation chinosanganisira:

• Kudzora maitiro ehuwandupanguva yekugadzira bhodhi rekudzvanya uye kuunganidza zvikamu.
• Kuomesa ne vacuum uye kuisa mafuta mukatimaitiro anovimbisa kubviswa kwakakwana kwehunyoro nemagasi zvinogona kutanga kuburitswa zvishoma.
• Mepu yekuburitsa chikamupanguva yekuedzwa kwekukurumidza kuona nekugadzirisa chero zvikanganiso zvekugadzira.

Kune ma transformer e 220kV, tinoshandisa nzira dzakasimba dzekuchenesa panguva yekubatanidza ma winding uye ma tanking, sezvo kunyangwe zvinhu zvinosvibisa zvidiki-diki zvinogona kuderedza zvakanyanya simba rekudzivirira kupisa pasi pemagetsi akawanda.

Mafambiro Emangwana MuTekinoroji Yekudzivirira

Kushanduka kwe transformer insulation kunoenderera mberi nekuvandudzwa kwakati wandei kunovimbisa:

• Tekinoroji yemapatya edhijitarikugadzira makopi chaiwo emasisitimu ekudzivirira kupisa kuti aone mashandiro enguva chaiyo uye agadzirise zvinhu zvinofanotaurwa.
• Kutarisa mamiriro epamusorokushandisa masensa e fiber optic akasungirirwa kuti aongorore mashandiro emagetsi pamwe nenzvimbo dzinopisa mukati menguva yese yekushanda kwetransformer.
• Zvinwiwa zvinodzivirira zvakatipoteredzadzakadai sema esters echisikigo anopa nzvimbo dzemoto dzakakwirira uye kufambirana kwakanaka kwezvakatipoteredza ukuwo achichengetedza mashandiro e dielectric.

Pakushandisa kwe220kV, tinonyanya kufarira mashandisirwo ekudzidza kwemuchinamukugadzirisa dhizaini yekudzivirira kupisa, uko maalgorithms anogona kuongorora nekukurumidza zviuru zvemhando dzakasiyana dzekugadzira kuti aone magadzirirwo akakodzera anoenzanisa kufunga kwemagetsi, kupisa, uye hupfumi.

Mhedziso

Kugadziriswa kwe220kV transformer inter-coil main insulation gaps inomiririra dambudziko guru reinjiniya rinoda ruzivo rwakadzama rwe dielectric theory, hunyanzvi hwepamusoro hwe simulation, uye hunyanzvi hwekugadzira. Kuburikidza nekuongorora kwakazara kwemagetsi uye nzira dzekuvandudza dzakanangana, tinogona kuwedzera zvakanyanya kuvimbika kwe transformer uye kurarama kwenguva refu.

Maitiro edu anoratidza kuti dhizaini yekudzivirira inovandudza mashandiro e dielectric haingogadzirisi mashandiro e dielectric chete asiwo inogonesa ma transformer madiki uye asingadhuri. Nekushandisa matekiniki aya epamusoro, tinounza ma transformer anopfuura mwero weindasitiri uku tichipa vatengi vedu kuvimbika kwekushanda kwepamusoro uye mari yese yekubatsira varidzi.

Sezvo tekinoroji iri kuramba ichichinja, tinoramba takazvipira kubatanidza kufambira mberi kwazvino mukugadzira insulation, tichiona kuti vatengi vedu vanobatsirwa nemhinduro dze transformer dzakavimbika uye dzinoshanda dziripo pamusika.

Bata timu yedu yeinjiniya nhasikuti tikurukure kuti hunyanzvi hwedu hwekugadzira insulation hunogona sei kusimudzira mashandiro uye kuvimbika kwemapurojekiti enyu e220kV transformer.