Ngenxa yezidingo zokukhiqiza, kunenombolo enkulu yemithwalo yepompo embonini ye-petrochemical, futhi imithwalo eminingi yepompo ifakwe iziguquli zemvamisa.Inani elikhulu lezicelo zeziguquli zemvamisa kukhulisa kakhulu okuqukethwe kwe-harmonic kohlelo lokusabalalisa embonini ye-petrochemical.Okwamanje, izixhumanisi eziningi zokulungisa iziguquli zefrikhwensi ziwukusetshenziswa kwe-6 pulse rectifier ukuguqula i-AC ibe yi-DC.Ngakho-ke, ama-harmonics akhiqizwa ngokuyinhloko yi-harmonics yesi-5, yesi-7 neye-11.
1. Ukuhlaziywa kwezici zomthwalo embonini kawoyela
Ngaphezu kwama-85% omthwalo wamandla kugridi yemboni kawoyela ungumthwalo ongenisayo, njengamaphampu kawoyela ahlukahlukene, izinjini nokunye.Eminyakeni yamuva nje, njengoba indawo kawoyela ibeke phambili izidingo eziphakeme zokongiwa kwamandla, amayunithi amaningi amukele inani elikhulu lamathuluzi okonga amandla.Ngenxa yomphumela wayo osobala wokonga amandla, ukulungiswa okulula, ukugcinwa okulula kanye nenethiwekhi, isiguquli semvamisa sisetshenziswe kabanzi ekuxhashazweni kukawoyela.Iphampu, iphampu, iphampu eyehlayo kanye nephampu yokuxuba esiteshini sokukhiqiza uwoyela iqhutshwa yi-converter frequency, kodwa isiguquli semvamisa sizokhiqiza inani elikhulu lama-harmonics ukuphazamisa umthwalo nemishini yawo eseduze, kanye nama-harmonics nawo azokwenza. kuthinte igridi yamandla omphakathi ngokusebenzisa intambo yamandla okufakwayo.
2. Ukulimala kwama-harmonics kugridi yamandla kawoyela
I-1) I-Harmonics ithinta ukusebenza okuzinzile kwegridi yamandla kawoyela futhi inciphisa ikhwalithi yokuphakelwa kwamandla wegridi yamandla kawoyela.
I-2) I-Harmonics ikhulisa amandla okulahlekelwa kwe-capacitor, ifinyeze impilo yesevisi ye-capacitor yamandla, futhi esimweni se-harmonics enzima, izokwenza futhi i-capacitor iqhume, ihlehle noma iqhume.I-Harmonics nayo ingakhuphula ukulahleka kwamandla kwe-transformer.
I-3) I-Harmonics izobangela ukulahlekelwa kwamandla enjini ejikelezayo, kubangele ukushisa ngokweqile, ukukhiqiza ukudlidliza komshini, umsindo kanye ne-harmonic overvoltage, okuzonciphisa ukuphila kwemishini, ngisho nokulimala ezimweni ezimbi kakhulu;I-Harmonics izodala iphutha lokuvikela i-relay noma isenzo sokwenqaba;Ama-harmonics ohlelweni lwamandla ahlanganiswe nesistimu yamanje ebuthakathaka ngokungeniswa kwe-electromagnetic, induction kanye nokuqhutshwa kwe-electrostatic, okuzophinde kubangele ukuphazamiseka ohlelweni lwamanje olubuthakathaka.
Ngokusetshenziswa okubanzi kwe-frequency converter ohlelweni lomjovo wamanzi wensimu kawoyela, akuxazululi kuphela izinkinga zokuhlukahluka kokucindezela komjovo wamanzi wendabuko, ukusetshenziswa kwamandla okuphezulu nokusebenza kahle okuphansi, kodwa futhi kuletha ukwanda kokuqukethwe kwe-harmonic kugridi yamandla.Ukuba khona kwenani elikhulu lama-harmonics kusongela ukuthembeka nokuphepha kohlelo lokuhlinzeka ngamandla.Ukuze kuqedwe ukulimala okubangelwa ama-harmonics, ukusetshenziswa kokukhiqiza, ukuthuthukisa ikhwalithi yokunikezwa kwamandla kagesi wegridi, ukuqinisekisa ukukhiqizwa okuvamile.
I-Noker Electric(/mayelana-nathi/) isihlungi se-harmonic esisebenzayongobuchwepheshe besimanje be-IGBT obusezingeni elingu-3, ingumkhiqizo okahle wokulawula i-harmonic.Noma yikuphi ukwesekwa, xhumana nathi ngokukhululekile.Sizokunikeza isixazululo esihlelekile.
Isikhathi sokuthumela: Jun-30-2023