Ungalinganisa kanjani izinga lokushisa likawoyela we-transformer?

Impilo yesevisi ye-transformer incike ekushiseni kwayo okugoqayo, okudlala indima ebalulekile ezintweni zokuvikela. Uma izinga lokushisa lokuvikela lokugoqa kwe-transformer likumazinga okushisa kawoyela we-transformer angu-80 kuya ku-130 °C, izinga lokuguga kwe-insulation lizophindeka kabili ngokwanda ngakunye kwezinga lokushisa elingu-6 °C, okungukuthi, impilo ye-insulation izoncishiswa ngo-1/2, okuwumthetho "wamadigri ayisithupha" wokuguga kwe-insulation.

Ngesikhathi sokusebenza kwe-transformer, ngokuvamile kushiwo ukuthi ama-85°C angumkhawulo wokushisa okuphezulu kukawoyela. Endaweni yaseDongying, lapho izinga lokushisa eliphezulu likawoyela lifinyelela ngaphezu kwama-80°C, kuzokhishwa isignali ye-alamu ethi "XX main transformer body oil temperature high alarm" kanye "XX main transformer body oil temperature".

Izinga lokushisa lama-transformer acwiliswe ku-oyela, kokubili uwoyela we-transformer kanye nokugoqa, lingalinganiswa kusetshenziswa igeyiji yokushisa efakwe ku-oyela we-transformer phezulu kwe-casing. Lokhu kuvumela ukuqapha izinga lokushisa lilonke le-transformer. Njengoba ama-windings e-transformer angakhiqiza ukushisa okweqile ngesikhathi sokusebenza, ngokuvamile anezinga lokushisa eliphakeme kune-oyela. Indawo eshisayo kakhulu ngaphakathi kwe-transformer, eyaziwa ngokuthi izinga lokushisa le-hot spot, iyisici esibalulekile ekubikezeleni ukuguga kwe-insulation. Le ndawo eshisayo ivame ukutholakala eduze kwemikhawulo yama-windings kodwa kunzima ukuyilinganisa ngokunembile. Ukuqapha leli zinga lokushisa langaphakathi, kuvame ukusetshenziswa inkomba yokushisa ye-transformer. Ngakho-ke, ama-transformer amaningi acwiliswe ku-oyela afakwe igeyiji yokushisa ephezulu kanye ne-winding.

Isikhombisi esimnyama ku-thermometer sibonisa izinga lokushisa langempela lokusebenza, kanti isikhombisi esibomvu sibonisa izinga lokushisa le-alamu elibekwe phezulu. Lapho izinga lokushisa likawoyela lesendlalelo esiphezulu se-transformer lidlula leli nani, lizoxwayisa, izikhombisi ezimbili zishayisane ukuze zenze ukuxhumana kukagesi, bese kukhishwa isignali ye-alamu, bese kuba nokuvela kwenaliti ebomvu. Lapho izinga lokushisa likawoyela lidlula izinga lokushisa eliphezulu ngesikhathi sokusebenza, isikhombisi esimnyama sizoshayela inalithi ebomvu. Isikhombisi siyajikeleza, ngalesi sikhathi inalithi ebomvu ikhombisa izinga lokushisa eliphakeme kakhulu elifinyelelwe ngesikhathi sokusebenza.

Izinga lokushisa eligoqekayo ku-transformer lingabhekwa njengokubekwa kwezinga lokushisa likawoyela lesendlalelo esiphezulu se-transformer kanye nokwenyuka kwezinga lokushisa lokugoqekayo ku-oyela. Ngokuvamile, ugesi womthwalo we-transformer wengezwa ngokusekelwe ohlelweni lokulinganisa izinga lokushisa likawoyela we-transformer, futhi ukwenyuka kwezinga lokushisa lokugoqekayo ku-oyela kulingiswa ngendlela yokulingisa ukushisa, ukuze ekugcineni kutholakale inkomba yokushisa yokugoqeka kwe-transformer. Umdwebo weskimu wendlela ethile yokusebenzisa uboniswe esithombeni esilandelayo.

Izinga lokushisa lokugoqa le-transformer elicwiliswe uwoyela i-Tw lingalingana nalokhu:

I-Tw=T0+k*△Okubili

Kule fomula, i-T0 izinga lokushisa likawoyela lesendlalelo esiphezulu se-transformer, △Okubili umehluko wokushisa kukawoyela wethusi, otholakala ngokulingisa ukushisa, i-k iyi-coefficient yokushisa, ehlobene nomthamo we-transformer, isakhiwo sokugoba, njll. Ukwenyuka kwezinga lokushisa kokugoba kuwoyela △Okubili kuncike ekugelezeni kokugoba. ukudlula kwamandla kagesi.

Uhlelo lokulinganisa luqukethe ikakhulukazi iphakheji yokuzwa izinga lokushisa, isekethe yokunxephezela izinga lokushisa eshintshashintshayo ye-transformer, kanye nesensa. Phakathi kwazo, isekethe yokunxephezela izinga lokushisa kanye nesensa yokushisa eshintshashintshayo ye-transformer konke kusephaketheni lokuzwa izinga lokushisa, futhi iphakheji yokuzwa izinga lokushisa ifakwa emafutheni aphezulu e-transformer ukuze izwe izinga lokushisa eliphezulu likawoyela. Isensa inezingxenye ezimbili: inzwa yokushisa exhunywe ekushiseni okujikelezayo endaweni kumitha ye-transformer mechanical, inani lokushisa eliqoqiwe libonakala ekufundweni kwepuleti lesikhombisi sokushisa; ukumelana nokushisa kwe-Pt100, okunenani lokumelana elishintshayo ngokushintsha kwezinga lokushisa, inani lokushisa eliqoqiwe lisetshenziselwa ukuthumela uhlelo lokuqapha isizinda sekhompyutha.

Ulwazi lokushisa kukawoyela ludluliselwa esikhungweni sokuthumela ngendlela yokuxhuma eboniswe esithombeni esingezansi ukuze kuqashwe ngesikhathi sangempela izinga lokushisa likawoyela eliphezulu kanye nezinga lokushisa elijikelezayo.

1. Ungahlulela kanjani ukuthi ukushintsha kwezinga lokushisa kwe-transformer kuyinto evamile noma engavamile?

Ngesikhathi i-transformer isebenza, ukulahlekelwa kwamandla kokubili enkabeni yensimbi kanye nasezindindini kuguqulwa kube ukushisa. Lokhu kuphumela ekukhuphukeni kwezinga lokushisa kuzo zonke izingxenye ezahlukene ze-transformer, bese ihlakazeka ngemisebe kanye nokuqhuba. Uma sekufinyelelwe ibhalansi phakathi kokukhiqizwa kokushisa kanye nokuhlakazeka, izinga lokushisa liyazinza engxenyeni ngayinye. Inani lokulahlekelwa yinsimbi lihlala lifana kuyilapho ukulahlekelwa kwethusi kuyahlukahluka kuye ngomthwalo. Ukuze uhlole ukusebenza kwe-transformer, qaphela izinga lokushisa langaphandle, izinga lokushisa eliphezulu likawoyela, umthwalo, kanye nokuphakama kwezinga likawoyela ngesikhathi sokuhlolwa. Lawa manani angafaniswa nokufundwa kwangaphambilini ukuze kunqunywe ukuthi i-transformer isebenza kahle yini.

Uma izinga lokushisa likawoyela lingaphezu kuka-10°C uma kuqhathaniswa nokuvamile ezimweni ezifanayo, noma uma izinga lokushisa liqhubeka nokwenyuka ngaphandle kokushintsha umthwalo futhi idivayisi yokupholisa isebenza kahle, lokhu kubonisa inkinga yangaphakathi nge-transformer. Kubalulekile ukuhlola noma yimaphi amaphutha noma ukwehluleka ku-thermometer. Ukushisa okuyinhloko kwama-transformer amaningi (okwaziwa ngokuthi ukushisa kwe-Class A) kwenziwa ngephepha futhi kungamelana namazinga okushisa afinyelela ku-105°C. Ngokuvamile, izinga lokushisa lokugoqa lizoba ngu-10-15°C ngaphezu kwezinga lokushisa lobuso bawoyela. Isibonelo, uma ubuso bawoyela bulinganiselwa ku-85°C, lindela izinga lokushisa lokugoqa eliphakathi kuka-95-100°C.

2. Izizathu zokushisa okungajwayelekile kwe-transformer

① Ukushisa okungajwayelekile okubangelwa iphutha langaphakathi

Uma i-transformer ihlangabezana namaphutha angaphakathi, njenge-inter-turn noma i-inter-layer short circuits, kungase kube nezinkinga eziningana. Ikhoyili izophuma iye endaweni ebiyelwe, okubangela ukushisa emajoyintini angaphakathi e-lead. Ngaphezu kwalokho, ukugqwala kwamaphuzu amaningi kwe-iron core kungandisa ama-eddy currents futhi kuholele ekushiseni ngokweqile. Kwezinye izimo, ukuvuza kwe-flux kungakha i-loop nethangi likawoyela wensimbi futhi kubangele ukwakheka kokushisa. Uma kukhona ezinye izinto ezibangela amazinga okushisa angajwayelekile ku-transformer, igesi noma ukuvikelwa komehluko kungasebenza. Ezimweni ezimbi kakhulu, uwoyela kungadingeka ufakwe epayipini elingaqhumi noma evalvini yokusiza ingcindezi. Kulesi simo, kuyalulekwa ukuthi ume futhi uhlole i-transformer.

②Ukushisa okungavamile okubangelwa ukusebenza okungavamile kwe-cooler

Ukushisa okungajwayelekile okubangelwa ukusebenza okungajwayelekile noma ukwehluleka kwesibandisi, njengokuphela kwephampu ecwiliswa emanzini, ifeni eyonakele, ukungcola kwamapayipi okupholisa, ukusebenza kahle kokupholisa okungekuhle, kanye nokwehluleka kwevalvu yerediyetha ukuvula. Uhlelo lokupholisa kufanele lugcinwe futhi luhlanzwe ngesikhathi noma kufanele kufakwe isibandisi esisekelayo, ngaphandle kwalokho umthwalo we-transformer kufanele ulungiswe.

③ Uma inkomba yokushisa inamaphutha noma inkomba yehluleka, kufanele kushintshwe i-thermometer.