Ngezidingo zokuthuthukiswa kwezimboni, ukuze kuncishiswe umthwalo wesistimu futhi wonge amandla, inani elikhului-variable frequency inverter zisetshenziswa ezikhathini zezimboni.Ukusetshenziswa kwei-frequency converter ingakwazi ngempela ukufeza imiphumela yokonga amandla, kodwa futhi iletha ezinye izinkinga ezifana nama-harmonics.Sihlangabezane nesayithi elivamile lapho inani elikhulu lama-inverter anamandla aphezulu lisetshenziswe ekulawuleni iphampu yamanzi.Ukusebenza kwenani elikhulu lemishini ye-inverter kuholela ekuhlanekeni okukhulu kwe-harmonic ohlelweni, okuthinta kakhulu ukusebenza okuphephile nokuzinzile kwesistimu.
Kusukela ku-waveform yokuhlolwa kwensimu, i-oda eliyinhloko lokuhlanekezela i-harmonic lingama-harmonics angu-5, 7.Ngaphambi kokusebenza kweI-APF, inani eliphelele lokuhlanekezelwa kwe-harmonic lesistimu selifinyelele ku-39.5%.Ngemva kokusebenza kweisihlungi se-harmonic esisebenzayo, inani eliphelele lokuhlanekezela kwe-harmonic lesistimu lincishisiwe laya cishe ku-6%, i-waveform ibuyiselwa esimweni esijwayelekile, futhi ama-harmonics we-oda ngalinye ancishiswa kakhulu.Kusukela kumdwebo 1 kuya ku-4, singabona ngokucacile ukuthi umphumela wokulawula i-harmonic ngemva kokusebenzisaisihlungi esisebenzayokusobala kakhulu futhi kuyasebenza.
Ukulimala kwama-harmonics kubi kakhulu.Ama-Harmonics anciphisa ukusebenza kahle kokukhiqizwa, ukudluliselwa kanye nokusetshenziswa kwamandla kagesi, ukushisa ngokweqile okokusebenza kukagesi, ukukhiqiza ukudlidliza nomsindo, futhi kwenza ukufakwa kwe-insulation kuguge, kufinyeze impilo yesevisi, ngisho nokungasebenzi kahle noma ukusha.I-Harmonics ingabangela i-parallel resonance yasendaweni noma i-resonance yochungechunge kusistimu yamandla, ekhulisa okuqukethwe kwe-harmonic futhi ibangele ukuthi i-capacitor nezinye izinto zokusebenza zishise.I-Harmonics futhi ingabangela ukusetshenziswa kabi kokuvikelwa kwe-relay namadivayisi azenzakalelayo, okubangela ukudideka esilinganisweni samandla kagesi.Ngaphandle kwesistimu yamandla, ama-harmonics angabangela ukuphazamiseka okukhulu emishinini yokuxhumana nemishini kagesi.
Iisihlungi samandla asebenzayoixhunywe kusistimu yamandla ngokuhambisana, nge-transformer yamanje yangaphandle ukuze isampula yamanje yezigaba ezintathu.Iyunithi yokulawula eyinhloko ibala inani lamanje lesinxephezelo esidingekayo bese ithumela umyalo ku-IGBT, I-IGBT ilungisa ngokushintshashintshayo imvamisa yokushintsha ukuze ithuthukise ukusebenza futhiI-AHFukulungisa i-harmonic current.
Isikhathi sokuthumela: Jul-28-2023