Idivayisi yokulawula i-voltage ye-transformer ihlukaniswe yaba yi-transformer "off-excitation" idivayisi yokulawula i-voltage kanye ne-transformer "on-load" yokuguqula kampompi.
Zombili zibhekisela kumodi yokulawula i-voltage yesishintshi sempompi ye-transformer, ngakho-ke yini umehluko phakathi kwalokhu kokubili?
① Isiguquli sikampompi “se-off-excitation” siwukushintsha umpompi oseceleni we-voltage ephezulu we-transformer ukuze uguqule isilinganiso sokujika sokuvala ukulawulwa kwamandla kagesi lapho zombili izinhlangothi eziyinhloko nesesibili ze-transformer zinqanyulwa kumandla kagesi.
② “Okulayishiwe” isiguquli sempompi: Ngokusebenzisa isishintshi sempompi elayishiwe, umpompi wamajika e-transformer uyashintshwa ukuze ushintshe ukuphenduka kwe-high-voltage yokulawulwa kwamandla kagesi ngaphandle kokunqamula umthamo wamanje.
Umehluko phakathi kwalokhu okubili ukuthi i-off-excitation changer ayinawo amandla okushintsha amagiya nomthwalo, ngenxa yokuthi lolu hlobo lokushintsha umpompi lunohlelo lokunqanyulwa kwesikhashana ngesikhathi sokushintsha igiya. Ukunqamula amandla okulayisha kuzodala ukungqubuzana phakathi koxhumana nabo futhi kulimaze isishintshi sokuthinta. Isishintshi sempompi elayishiwe sinokushintsha kokumelana okudlulele phakathi nenqubo yokushintsha igiya, ngakho-ke ayikho inqubo yokunqamula yesikhashana. Uma usuka kwelinye igiya uye kwelinye, ayikho inqubo ye-arcing lapho umthwalo wamanje unqanyulwa. Ngokuvamile isetshenziselwa ama-transformer anezidingo eziqinile zama-voltage adinga ukulungiswa njalo.
Njengoba i-transformer "on-load" ishintshile kampompi ingakwazi ukubona umsebenzi wokulawula i-voltage ngaphansi kwesimo sokusebenza se-transformer, kungani ukhetha isishintshi se-tap "off-load"? Yiqiniso, isizathu sokuqala yintengo. Ngaphansi kwezimo ezijwayelekile, intengo ye-off-load tap converter ingu-2/3 yenani le-on-load tap change transformer; ngesikhathi esifanayo, ivolumu ye-transformer ye-off-load tap changer incane kakhulu ngoba ayinayo ingxenye yokuguqula kampompi olayishiwe. Ngakho-ke, uma ingekho imithetho noma ezinye izimo, i-off-excitation tap converter izokhethwa.
Kungani ukhetha i-transformer on-load tap change? Uyini umsebenzi?
① Thuthukisa izinga lokufaneleka likagesi.
Ukudluliswa kwamandla kunethiwekhi yokusabalalisa yesistimu yamandla kudala ukulahlekelwa, futhi inani lokulahlekelwa lincane kakhulu eduze ne-voltage elinganiselwe. Ukuqhuba ukulawulwa kwamandla kagesi alayishiwe, njalo ukugcina amandla kagesi esiteshi esingaphansi afanelekile, nokwenza okokusebenza kukagesi kusebenze endaweni elinganiselwe ye-voltage kuzokwehlisa ukulahlekelwa, okonga kakhulu futhi okunengqondo. Izinga lokufaneleka kwamandla kagesi lingenye yezinkomba ezibalulekile zekhwalithi yokuphakelwa kwamandla. Ukulawulwa kwamandla kagesi afakwa ngesikhathi kungaqinisekisa izinga lokufaneleka kwamandla kagesi, ngaleyo ndlela kuhlangatshezwane nezidingo zezimpilo zabantu kanye nokukhiqizwa kwezimboni nezolimo.
② Thuthukisa umthamo wesinxephezelo samandla asebenzayo futhi ukhuphule izinga lokufakwayo kwe-capacitor.
Njengedivayisi yesinxephezelo samandla asebenzayo, amandla aphumayo asebenzayo wama-capacitor amandla alingana nesikwele sevoltheji yokusebenza. Lapho i-voltage yokusebenza yesistimu yamandla incipha, umphumela wokunxeshezelwa uyancipha, futhi lapho i-voltage yokusebenza ikhuphuka, okokusebenza kukagesi kunxeshezelwa ngokweqile, okubangela ukuthi i-terminal voltage inyuke, idlule ngisho nesilinganiso, okulula ukulimaza ukufakwa kwemishini. kanye nesizathu
izingozi zemishini. Ukuze uvimbele amandla asebenzayo ukuthi abuyiselwe ohlelweni lwamandla kanye nezisetshenziswa zesinxephezelo samandla asebenzayo ukuthi zingakhutshazwa, okuholela ekumoshweni nasekulahlekeni okwengeziwe kwamadivayisi asebenza ngamandla asebenzayo, inkinobho eyinhloko yokudonsa i-transformer kufanele ilungiswe ngesikhathi ukuze kulungiswe ibhasi. i-voltage ebangeni elifanelekayo, ukuze asikho isidingo sokukhubaza isinxephezelo se-capacitor.
Isebenza kanjani i-on-load voltage regulation?
Izindlela zokulawula i-on-load voltage zifaka ukulawulwa kwamandla kagesi kanye nokulawulwa kwamandla kagesi okwenziwa ngesandla.
Ingqikithi yomthetho we-voltage on-load ukulungisa i-voltage ngokulungisa isilinganiso sokuguqulwa sohlangothi lwe-high-voltage kuyilapho i-voltage ohlangothini lwe-low-voltage ihlala ingashintshile. Sonke siyazi ukuthi uhlangothi lwe-high-voltage ngokuvamile luyi-voltage yesistimu, futhi i-voltage yesistimu ngokuvamile ayishintshi. Lapho inani lamajika ohlangothini lwe-high-voltage elijikayo likhuphuka (okungukuthi, isilinganiso sokuguqulwa siyanda), i-voltage ohlangothini lwe-low-voltage izokwehla; ngokuphambene nalokho, lapho inani lokujika emaceleni aphezulu-voltage liyancipha (okungukuthi, isilinganiso sokuguqulwa sincishisiwe), i-voltage ohlangothini lwe-low-voltage izokhula. Leyo:
Khulisa ukujika = i-downshift = ukuncishiswa kwe-voltage Ukunciphisa ukujika = upshift = ukukhuphuka kwamandla kagesi
Ngakho-ke, ngaphansi kwaziphi izimo lapho i-transformer ingakwazi ukwenza i-on-load tap change?
① Uma i-transformer igcwele kakhulu (ngaphandle kwezimo ezikhethekile)
② Uma i-alamu yegesi ekhanyayo yedivayisi yokulawula i-voltage eku-load ivuliwe
③ Lapho ukuphikiswa kwengcindezi kawoyela yedivayisi yokulawula i-voltage ekulayishwe kungafanelekile noma kungekho uwoyela kumaki kawoyela.
④ Uma inani lokulawulwa kwamandla kagesi lidlula inombolo eshiwo
⑤ Uma idivayisi yokulawula i-voltage ingavamile
Kungani ukulayisha ngokweqile kuphinde kukhiye isishintshi sempompi elayishiwe?
Lokhu kungenxa yokuthi ngaphansi kwezimo ezijwayelekile, phakathi nenqubo yokulawula i-voltage ekulayishweni kwe-transformer eyinhloko, kunomehluko we-voltage phakathi kwesixhumi esiyinhloko kanye nompompi ohlosiwe, okhiqiza amandla ajikelezayo. Ngakho-ke, phakathi nenqubo yokulawula i-voltage, i-resistor ixhunywe ngokuhambisana ukuze idlule i-circulating current kanye nomthwalo wamanje. I-resistor ehambisanayo idinga ukumelana nomsinga omkhulu.
Uma i-transformer yamandla igcwele kakhulu, ukusebenza kwamanje kwe-transformer eyinhloko kudlula okwamanje okulinganiselwe kwesiguquli sempompi, esingase ishise isixhumi esiwusizo sokushintsha kompompi.
Ngakho-ke, ukuze uvimbele ukwenzeka kwe-arcing ye-tap changer, kwenqatshelwe ukwenza ukulawulwa kwe-voltage ekulayishweni lapho i-transformer eyinhloko igcwele kakhulu. Uma ukulawulwa kwamandla kagesi kuphoqeleka, idivayisi yokulawula i-voltage ekulayishweni ingase iphele, igesi yokulayisha ingase isebenze, futhi inkinobho enkulu ye-transformer ingase iwiswe.
Isikhathi sokuthumela: Sep-09-2024