I high voltage inverter iyi-AC-DC-AC inverter yomthombo wamandla kagesi enesakhiwo sochungechunge lwamayunithi amaningi.Iqaphela i-sinusoidal waveform yokokufaka, i-voltage ephumayo kanye neyamanje ngobuchwepheshe be-superposition eminingi, ilawula ngempumelelo ama-harmonics, futhi inciphisa ukungcoliswa kugridi yamandla nomthwalo.Ngesikhathi esifanayo, inamadivayisi okuvikela aphelele kanye nezinyathelo zokuvikelai-frequency converter kanye nokulayisha, ukuze kuqedwe futhi kugwenywe ukulahlekelwa okubangelwa izimo ezihlukahlukene eziyinkimbinkimbi, nokudala izinzuzo ezinkulu kubasebenzisi.
2. Ukuvikelwa kwehigh voltage inverter
2.1 Ukuvikelwa komugqa ongenayo wesiguquli samandla kagesi aphezulu
Ukuvikelwa komugqa ongenayo ukuvikela umugqa ongenayo ekupheleni komsebenzisi kanyei-frequency converter, okuhlanganisa ukuvikelwa kombani, ukuvikelwa komhlaba, ukuvikelwa kokulahlekelwa kwesigaba, ukuvikelwa kwesigaba esihlehlayo, ukuvikelwa okungalingani, ukuvikelwa kwe-overvoltage, ukuvikelwa kwe-transformer nokunye.Lawa madivaysi okuvikela ngokuvamile afakwa ekugcineni kokufaka kwe-inverter, ngaphambi kokusebenzisa isiguquli kufanele siqale siqinisekise ukuthi ayikho inkinga ekuvikelweni komugqa ngaphambi kokusebenza.
2.1.1 Ukuvikela umbani kuwuhlobo lokuvikela umbani ngokusebenzisa isibambi esifakwe kukhabhinethi ye-bypass noma ekugcineni kokufaka kwe-inverter.Isibambisi iyisisetshenziswa sikagesi esingakhulula umbani noma sikhulule amandla adlula amandla okusebenza kwesistimu yamandla, sivikele okokusebenza kukagesi ekulimaleni kokugcwala okuphazima kweso, futhi sinqamule umsinga oqhubekayo ukuze kugwenywe umjikelezo omfishane wesistimu.Isibambisi sixhunywe phakathi komugqa wokufaka we-inverter kanye nomhlabathi, futhi sixhunywe ngokuhambisana ne-inverter evikelekile.Lapho inani le-overvoltage lifinyelela ku-voltage eshiwo yokusebenza, isibambisi sisebenza ngokushesha, sigeleza eshadini, sikhawulela i-overvoltage amplitude, futhi sivikela ukufakwa kwemishini;Ngemuva kokuthi i-voltage ijwayelekile, isibambisi sibuyisela ngokushesha esimweni saso sokuqala ukuze kuqinisekiswe ukusebenza okuvamile kwesistimu futhi kuvimbele ukulimala ngenxa yokushaywa kombani.
2.1.2 Ukuvikela umhlabathi ukufaka isiguquli se-zero-sequence transformer ekugcineni kwe-inverter.Umgomo wokuvikelwa kwamanje kokulandelana kweziro usekelwe emthethweni wamanje we-Kirchhoff, futhi isamba se-algebraic samanje esiyinkimbinkimbi esigeleza kunoma iyiphi i-node yesekethe silingana noziro.Uma ulayini kanye nemishini kagesi ijwayelekile, isamba se-vector yamanje esigabeni ngasinye silingana no-zero, ngakho-ke ukuvuthwa kwesibili kwe-transformer yamanje ye-zero-sequence ayinakho ukuphuma kwesignali, futhi i-actuator ayisebenzi.Uma kwenzeka iphutha elithile lomhlabathi, isamba se-vector yesigaba ngasinye samanje asiyona i-zero, futhi iphutha lamanje likhiqiza i-flux magnetic in the core of the zero-sequence current transformer, kanye nokungeniswa kwe-voltage yesibili ye-transformer yamanje elandelanayo kubuyiselwa ebhokisini lokuqapha eliyinhloko, bese kukhishwa umyalo wokuvikela ukuze kuzuzwe inhloso yokubeka phansi ukuvikelwa kwamaphutha.
2.1.3 Ukuntuleka kwesigaba, isigaba sokuhlehla, ukuvikeleka okungalingani, ukuvikelwa kwe-voltage ngokweqile.Ukushoda kwesigaba, isigaba sokuhlehla, ukuvikelwa kwedigri elingalingani, ukuvikelwa kwe-overvoltage ikakhulukazi inguqulo ye-inverter input voltage feedback noma i-voltage transformer ukuze kutholwe umugqa wamandla kagesi, bese ngokusebenzisa ibhodi le-CPU ukuze kunqunywe ukuthi ukuntuleka kwesigaba, isigaba sokuhlehla, okokufaka. Ibhalansi ye-voltage, kungakhathaliseki ukuthi i-overvoltage, ngoba uma isigaba sokufaka, noma isigaba sokuhlehla, nokungalingani kwe-voltage noma i-overvoltage kulula ukubangela ukuba i-transformer ishise.Noma iyunithi yamandla ilimele, noma injini ihlehlisiwe.
2.1.4 Ukuvikelwa kwe-Transformer.Ihigh voltage inverter yakhiwa izingxenye ezintathu kuphela: iKhabhinethi Transformer, amandla iyunithi iKhabhinethi, control iKhabhinethi ukwakheka, transformer kuyinto ukusetshenziswa tangential dry uhlobo transformer ukuguqula high-voltage kushintshana zamanje uchungechunge engele ezahlukene ongaphakeme voltage amandla supply for the unit amandla, i-transformer ingapholiswa kuphela ngokupholisa umoya, ngakho-ke ukuvikelwa kwe-transformer ikakhulukazi ngokuvikelwa kokushisa kwe-transformer, ukuvimbela ukushisa kwe-transformer kuphezulu kakhulu, futhi kubangele ukushiswa kwekhoyili ye-transformer.I-temperature probe ifakwa kukhoyili yesigaba sesithathu se-transformer, kanti enye ingxenye yokuhlola izinga lokushisa ixhunywe kudivayisi yokulawula izinga lokushisa.Idivayisi yokulawula izinga lokushisa ingasetha izinga lokushisa elizenzakalelayo le-fan ngaphansi kwe-transformer, izinga lokushisa le-alamu, nezinga lokushisa lohambo.Ngesikhathi esifanayo, izinga lokushisa lekhoyili yesigaba ngasinye liboniswa izikhathi eziningana.Ulwazi lwe-alamu luzovezwa kusixhumi esibonakalayo somsebenzisi, futhi i-PLC izokwethusa noma isivikelo sohambo.
2.2 Ukuvikelwa kohlangothi lwe-inverter ye-voltage ephezulu
Ukuvikelwa komugqa ophumayo wehigh voltage inverter ukuvikelwa kohlangothi oluphumayo lwe-inverter kanye nomthwalo, okuhlanganisa ukuvikelwa kokuphuma kwe-overvoltage, ukuvikelwa kwe-overcurrent okukhiphayo, ukuvikelwa kwesekethe emfushane okukhiphayo, ukuvikelwa kwe-motor overtemperature nokunye.
2.2.1 Ukuvikelwa kokuphuma kwe-overvoltage.Ukuvikelwa kwe-overvoltage okukhiphayo kuqoqa amandla kagesi okukhiphayo ngebhodi lesampula le-voltage ohlangothini lokuphumayo.Uma i-voltage ephumayo iphezulu kakhulu, isistimu izokhala ngokuzenzakalelayo.
2.2.2 Ukuvikelwa Kwesikhathi Esidlule Esiphumayo.Ukuvikelwa kokuphumayo kwe-overcurrent kuthola okukhiphayo kwamanje okuqoqwe yi-Hall futhi kukuqhathanise ukuze kunqunywe ukuthi ingabe ibangela ukudlulela kwezikhathi.
2.2.3 Ukuvikelwa kwe-Short-circuit.Izinyathelo zokuvikela iphutha lesifunda esifushane phakathi kwama-stator windings nezintambo eziholayo zenjini.Uma i-inverter inquma ukuthi okukhiphayo kuyisekethe emfushane, ivimba ngokushesha iyunithi yamandla futhi iyeke ukusebenza.
Isikhathi sokuthumela: Jul-28-2023