Kunezindlela eziningi zokunciphisa i-harmonic, kodwa asikho isisombululo sokuxazulula zonke izinkinga.Ukunikezwa kwamandla okuhlukile, umthwalo ohlukile, udinga ukuthi sinikeze isisombululo esingcono kakhulu sokunciphisa i-harmonic.
Ithebula elingezansi liqhathanisa ne-THDi yobuchwepheshe obuhlukahlukene bokunciphisa i-harmonic ngaphambili.
| I-pulse eyisithupha vfd akukho reactor/klinywa | Ama-pulsed ayisithupha vfd I-low DC bus capacitor | I-pulse eyisithupha vfd+5% i-reactor/choke | 3 isigaba vfd esebenzayo front end drive | I-pulse eyisithupha vfd+isihlungi se-passive | I-multipulse vfd | |
| I-THDi ejwayelekile | 90--120% | 35--40% | 35--45% | 3--5% | 5--10% | 12 ishayela: 10-12% 18 ishayela: 5--6% |
| Izinzuzo | Isixazululo esilula nesiphansi, esamukelekayo ukufakwa ngenani eliphansi lamadrayivu amancane | Isixazululo esilula nesiphansi esiholela ekunciphiseni okuthile kwama-harmonics amanje | Isixazululo esijwayelekile ezinhlelweni zokusebenza ze-HVAC | Ukusebenza okuhle kakhulu kwe-harmonic kwanoma yiziphi izixazululo. Ikhono lokuthuthukisa i-voltage ephumayo phakathi nezimo zomugqa ophansi. Isici samandla ayisisekelo sobunye. Inganikeza amabhuleki okuvuselelayo | Uma kucatshangelwa ukuthi indawo ebonakalayo iyatholakala, isihlungi se-harmonic esingenzi lutho singangezwa ngemuva kokufakwa kwedrayivu, uma ama-harmonics enqunywa ukuthi ayinkinga. | Indlela yokunciphisa ye-harmonic yendabuko. |
| Ububi | Okuqukethwe okuphezulu kwe-harmonic, okunganconyelwe ukufakwa ngenani eliphezulu lamadrayivu. | Ukuhlanekezelwa kwamandla kagesi aphezulu, okungaphezu kwe-pulse vfd eyisithupha eno-5% we-reactor/choke. | Amasistimu anenani elikhulu noma osayizi abakhulu bamadrayivu, angadinga ukuncishiswa okwengeziwe kwe-harmonic. | Idrayivu ngokwayo ikhiqiza ukushisa okuthe xaxa kune-standard six pulse drive enereactor. | Isici samandla aholayo ekulayishweni okulula ngaphandle uma ama-capacitor esihlungi ecishiwe wesekethe. Ingozi yama-resonance phakathi kwama-capacitor okuhlunga namanye ama-capacitor ohlelweni. | Ukusebenza okuphezulu kwe-harmonic kudinga okuphakelayo kwamandla we-AC okulingana ngokuphelele nokuhlanekezela okuncane kwangemuva. Kunzima kakhulu ukubuyisela esimweni. |
Ngokuthuthuka okuqhubekayo kobuchwepheshe bamandla e-IGBT, amaleveli amathathu amashaisihlungi esisebenzayoiye yakhuthazwa kabanzi futhi yasetshenziswa emakethe.I-APFithola isignali yamanje ngesikhathi sangempela nge-transformer yamanje yangaphandle, futhi ihlukanise ingxenye ye-harmonic ngokusebenzisa isifunda sokubona kwangaphakathi, futhi ikhiqize isinxephezelo samanje nesigaba esiphambene se-harmonics ohlelweni ngokusebenzisa isiguquli samandla se-IGBT ukuze sibone umsebenzi wokuhlunga. ngaphandle kwe-harmonic.
Imali yesinxephezelo esiphumayo seI-APFihlukahluka ngokunembile ngokuvumelana ne-harmonics eguquguqukayo yesistimu, ngakho-ke ngeke kube khona inkinga yesinxephezelo.Ngaphezu kwalokho,I-APFinomsebenzi wokuvikela ukugcwala ngokweqile.Uma i-harmonic yesistimu inkulu kunomthamo wokuhlunga, idivayisi ingakhawulela ngokuzenzakalela ukukhishwa komthamo olinganiselwe ongu-100% ngaphandle kokulayishwa ngokweqile.
Isikhathi sokuthumela: Nov-24-2023