Ngokuthuthuka ngesivinini komnotho wezwe lethu, ikakhulukazi ukukhula ngesivinini kwezimboni zezimayini, ezincibilikisayo nezigayayo eminyakeni edlule, siyakhula isidingo sikagesi.Phakathi kwazo, imishini yokulungisa isithando somlilo esincibilikisa imvamisa emaphakathi ingenye yemishini emikhulu yokuphehla amandla kagesi e-harmonic, kodwa ngenxa yokuthi abakhiqizi abaningi banciphisa izindleko zomkhiqizo futhi abafaki izinsiza zobuchwepheshe bokucindezela i-harmonic, igridi yamandla omphakathi yamanje ingcoliswe kakhulu ama-harmonics afana ne-haze weather .I-Pulse current inciphisa ukucutshungulwa, ukudluliswa kanye nokusetshenziswa kwamandla kagesi, ishisa kakhulu okokusebenza kagesi, ibangele ukudlidliza nomsindo, ukwahlukanisa ngeminyaka, ifinyeze impilo yesevisi, futhi ibangele nokwehluleka noma ukusha.I-Harmonics ingabangela i-parallel resonance noma uchungechunge lwe-resonance yesistimu yamandla, ngaleyo ndlela yandise okuqukethwe kwe-harmonic futhi ibangele ama-capacitor ashise nezinye izisetshenziswa.I-Harmonics futhi ingabangela ukusetshenziswa kabi kokudluliselwa kokuvikela kanye namadivayisi azenzakalelayo futhi kudide izilinganiso zamandla.Ama-Harmonics angaphandle kwesistimu yamandla angaphazamisa kakhulu izinto zokuxhumana kanye nemishini kagesi.
Isithando somlilo sikagesi esinemvamisa emaphakathi singenye yemithombo emikhulu ye-harmonic ekulayisheni kwegridi, ngoba siguqulwa sibe imvamisa emaphakathi ngemva kokulungiswa.I-Harmonics izofaka engozini kakhulu ukusebenza okuphephile kwegridi yamandla.Isibonelo, i-harmonic current izobangela ukulahlekelwa kwensimbi eyengeziwe ye-vortex ephezulu-frequency ku-transformer, okuzokwenza ukuthi i-transformer ishise ngokweqile, inciphise umthamo ophumayo we-transformer, ikhulise umsindo we-transformer, futhi ibeke engozini impilo yesevisi ye-transformer. .Umphumela wokunamathela we-harmonic currents unciphisa isigaba esiphambanayo njalo somqhubi futhi ukhulise ukulahlekelwa komugqa.I-Harmonic voltage ithinta ukusebenza okuvamile kwezinye izinto zikagesi kugridi, ibangele amaphutha okusebenza emishinini yokulawula okuzenzakalelayo kanye nokuqinisekiswa kokulinganisa okunganembile.I-Harmonic voltage kanye namanje kuthinta ukusebenza okuvamile kwemishini yokuxhumana ye-peripheral;i-overvoltage yesikhashana kanye nokweqisa kwesikhashana okubangelwa ama-harmonics kulimaza ungqimba lokufakwa kwemishini nemishini, okuholela emaphutheni esigaba esifushane sesekhethi yezigaba ezintathu kanye nokulimala kwama-transformer;i-harmonic voltage kanye nenani lamanje lizodala i-resonance yochungechunge oluyingxenye kanye nokuzwakala okuhambisanayo kugridi yamandla omphakathi, okuholela ezingozini ezinkulu.Enqubweni yokunamathela ezinguqukweni eziqhubekayo, into yokuqala okufanele uyithole ku-DC ukunikezwa kwamandla kwamagagasi ayisikwele, okulingana nokuphakama okuphezulu kwama-harmonics aphezulu.Nakuba isifunda sakamuva sidinga ukuhlungwa, i-harmonics ephezulu ayikwazi ukuhlungwa ngokuphelele, okuyisizathu sokukhiqizwa kwama-harmonics.
Sakhe izihlungi ezishunwe kanye izikhathi ezingu-5, 7, 11 nezingu-13.Ngaphambi kwesinxephezelo sesihlungi, isici samandla sesigaba sokuncibilika sesithando somlilo sikagesi esiphakathi nendawo singu-0.91.Ngemuva kokuthi idivayisi yesinxephezelo sesihlungi isiqalile ukusebenza, isinxephezelo esiphezulu singu-0.98 capacitive.Ngemva kokusebenzisa idivayisi yesinxephezelo sesihlungi, inani eliphelele lokuhlanekezelwa kwamandla kagesi (inani le-THD) lingu-2.02%.Ngokwezinga lamandla elijwayelekile le-GB/GB/T 14549-1993, inani le-voltage harmonic (10KV) lingaphansi kuka-4.0%.Ngemva kokuhlunga i-harmonic yamanje yesi-5, yesi-7, yesi-11 neye-13, izinga lokuhlunga licishe libe ngu-82∽84%, lifinyelela inani elivumelekile lezinga lenkampani yethu.Umphumela omuhle wesihlungi sesinxephezelo.
Ngakho-ke, kufanele sihlaziye izimbangela zama-harmonics futhi sithathe izinyathelo zokucindezela ama-harmonics aphezulu, okubalulekile ukuze kuqinisekiswe ukusebenza okuphephile nokonga kwezinhlelo zamandla.
Okokuqala, imbangela ye-harmonics yesithando somlilo esiphakathi
1. Ama-harmonics akhiqizwa imithwalo engaqondile, njengezihlungi ezilawulwa nge-silicon, izinsiza zamandla ezishintshayo, njll. Imvamisa ye-harmonic ekhiqizwa yilo mthwalo iyinani eliphelele lokuphindaphinda imvamisa yokusebenza.Isibonelo, i-rectifier yesigaba sesithupha se-pulse ikakhulukazi ikhiqiza i-harmonics yesi-5 neyesi-7, kuyilapho i-rectifier yezigaba ezintathu ze-12-pulse ikakhulukazi ikhiqiza i-harmonics ye-11 ne-13.
2. Ngenxa yama-harmonics akhiqizwa imithwalo ye-inverter efana ne-intermediate frequency furnaces kanye nama-inverters, akuwona kuphela ama-harmonics abalulekile akhiqizwayo, kodwa futhi ama-harmonics ama-fractional amvamisa yawo iphindwe kabili imvamisa ye-inverter.Isibonelo, isithando somlilo esiphakathi nendawo esisebenza ku-820 Hz sisebenzisa i-rectifier yesigaba sesithupha se-pulse asikhiqizi kuphela ama-harmonics wesi-5 no-7, kodwa futhi nama-harmonics angama-fractional ku-1640 Hz.
Ama-Harmonics akhona kanye negridi ngoba amajeneretha nama-transformer akhiqiza amanani amancane ama-harmonics.
2. Ukulimala kwama-harmonics esithandweni somlilo esiphakathi
Ekusetshenzisweni kwezithando zomlilo eziphakathi nendawo, inani elikhulu lama-harmonics liyakhiqizwa, okuholela ekungcolisweni okukhulu kwe-harmonic yegridi yamandla.
1. Ama-harmonics aphezulu azokhiqiza amandla kagesi noma amanje.Umthelela wokwanda ubhekisela kuvoltheji yesikhathi esifushane engaphezulu (ephansi) yesistimu, okungukuthi, i-voltage esheshayo engeqi i-millisecond elingu-1.Lokhu kushaya kwenhliziyo kungase kube kuphozithivu noma kube negethivu, futhi kungaba nochungechunge noma imvelo ye-oscillatory, okubangela ukuthi into esetshenziswayo ishise.
2. Ama-Harmonics anciphisa ukudluliswa nokusetshenziswa kwamandla kagesi kanye nemishini kagesi eshisayo, enza ukudlidliza nomsindo, enze imiphetho yawo ibe midala, anciphisa impilo yesevisi, ngisho nokungasebenzi kahle noma ukusha.
3. Kuthinta okokusebenza kwesinxephezelo samandla asebenzayo wesistimu yokuphakelwa kukagesi;uma kukhona ama-harmonics kugridi yamandla, i-voltage ye-capacitor iyanda ngemva kokufakwa kwe-capacitor, futhi okwamanje ngokusebenzisa i-capacitor iyanda nakakhulu, okwandisa ukulahlekelwa kwamandla kwe-capacitor.Uma okuqukethwe kwe-pulse yamanje kuphezulu, i-capacitor izoba ngaphezulu-yamanje futhi ilayishwe, okuzoshisa i-capacitor futhi isheshise ukukhishwa kwezinto ezinqenqemeni.
4. Lokhu kuzonciphisa isivinini kanye nempilo yesevisi yezinto zokusebenza zikagesi futhi kwandise nokulahlekelwa;kuthinta ngqo umthamo wokusetshenziswa kanye nezinga lokusebenzisa le-transformer.Ngesikhathi esifanayo, kuzophinde kwandise umsindo we-transformer futhi kunciphise kakhulu impilo yesevisi ye-transformer.
5. Ezindaweni ezinemithombo eminingi ye-harmonic kugridi yamandla, ngisho nenani elikhulu lokuwohloka kwama-capacitor e-electronic angaphakathi nangaphandle kwenzeka, futhi ama-capacitor esiteshini ashisiwe noma akhubeka.
6. I-Harmonics futhi ingabangela ukuvikelwa kwe-relay kanye nokwehluleka kwedivayisi okuzenzakalelayo, okuholela ekudidekeni esilinganisweni samandla.Leli ingaphandle lesistimu yamandla.I-Harmonics idala ukuphazamiseka okukhulu emishinini yokuxhumana kanye nemishini kagesi.Ngakho-ke, ukuthuthukisa ikhwalithi yamandla yesithando somlilo esiphakathi sekuyiyona nto eyinhloko yokuphendula.
Ezintathu, indlela yokulawula i-harmonic yesithando somlilo esimaphakathi.
1. Thuthukisa umthamo wesekethe emfishane yendawo yokuxhumana yomphakathi yegridi yamandla futhi unciphise i-harmonic impedance yesistimu.
2. Isinxephezelo samanje se-Harmonic sisebenzisa isihlungi se-AC nesihlungi esisebenzayo.
3. Khulisa inombolo ye-pulse yemishini yokuguqula ukuze unciphise i-harmonic current.
4. Gwema i-resonance yama-parallel capacitor kanye nomklamo we-inductance wesistimu.
5. Idivayisi yokuvimbela i-high-frequency ixhunywe ochungechungeni kumugqa wokudlulisa we-DC ophezulu we-voltage ukuze uvimbele ukusakazeka kwama-harmonics aphezulu.
7. Khetha imodi ye-wiring ye-transformer evumayo.
8. Izinto zokusebenza ziqoqwe ukuze zinikezwe amandla, futhi idivayisi yokuhlunga ifakiwe.
Okune, imishini yokulawula i-harmonic yesithando somlilo esiphakathi
1. Idivayisi yokuhlunga ye-Hongyan yokwenziwa.
Idivayisi yokuhlunga ye-Hongyan.Isivikelo siyi-resistor yochungechunge lwe-capacitor, futhi isihlungi se-passive sakhiwe i-capacitor kanye ne-resistor ochungechungeni, futhi ukulungiswa kuxhunywe ngezinga elithile.Ngokuvama okukhethekile, kukhiqizwa iluphu ye-impedance ephansi, efana ne-250HZ.Lesi isihlungi se-harmonic sesihlanu.Indlela inganxephezela kokubili ama-harmonics namandla asebenzayo, futhi inesakhiwo esilula.Kodwa-ke, okubi okuyinhloko kwale ndlela ukuthi isinxephezelo sayo sithinteka ekuvinjweni kwegridi kanye nesimo sokusebenza, futhi kulula ukuzwakala ngokuhambisana nesistimu, okuholela ekukhuliseni kwe-harmonic, ukulayisha ngokweqile ngisho nokulimala kwekristalu ewuketshezi. isihlungi.Ngemithwalo ehluka kakhulu, kulula ukubangela ukungaphansi kwesinxephezelo noma ukukhokha ngokweqile.Ngaphezu kwalokho, ingakwazi ukunxephezela kuphela ama-harmonics amisiwe, futhi umphumela wokunxeshezelwa awulungile.
2. Imishini yokuhlunga ye-Hongyan esebenzayo
Izihlungi ezisebenzayo zenza imisinga ye-harmonic yobukhulu obulinganayo ne-antiphase.Qiniseka ukuthi i-current ohlangothini lokuphakela amandla i-sine wave.Umqondo oyisisekelo uwukudala isinxephezelo samanje esinamandla afanayo nomthwalo wamanje we-harmonic futhi uhlehlise isikhundla, futhi uqedele okwamanje isinxephezelo ngomthwalo wamanje we-harmonic ukuze usule i-pulse current.Lena indlela yokuqeda i-harmonic yomkhiqizo, futhi umphumela wokuhlunga ungcono kunezihlungi ezingenzi lutho.
3. Hongyan Harmonic Umvikeli
Isivikeli se-harmonic silingana nokusabela kochungechunge lwe-capacitor.Ngenxa yokuthi i-impedance iphansi kakhulu, i-current izogeleza lapha.Lokhu empeleni ukuhlukaniswa kwe-impedance, ngakho-ke i-harmonic current efakwe ohlelweni ixazululwa ngokuyisisekelo.
Izivikeli ze-Harmonic zivame ukufakwa phambi kwemishini ethambile.Kuyimikhiqizo yokulawula i-harmonic yekhwalithi ephezulu, engamelana nomthelela wokuhlinzwa, imunce ama-harmonics aphakeme izikhathi ezi-2 ~ 65, futhi ivikele imishini.Ukulawulwa kwe-Harmonic kwezinhlelo zokulawula izibani, amakhompuyutha, amathelevishini, okokusebenza kokulawula isivinini sezimoto, izinto ezisetshenziswayo zikagesi ezingaphazamiseki, amathuluzi omshini we-CNC, izilungisi, amathuluzi anembayo, nezindlela zokulawula zikagesi.Wonke lawa ma-harmonics akhiqizwa imishini kagesi engeyona imigqa angabangela ukwehluleka ohlelweni lokusabalalisa ngokwalo noma kumishini exhunywe ohlelweni.Umvikeli we-harmonic angakwazi ukuqeda ama-harmonics emthonjeni wokukhiqiza amandla, futhi asuse ngokuzenzakalelayo ama-harmonics aphezulu, umsindo we-high-frequency, ama-pulse spikes, ama-surges nokunye ukuphazamiseka kwemishini kagesi.Isivikeli se-harmonic singahlanza ukunikezwa kwamandla, sivikele okokusebenza kukagesi kanye nempahla yesinxephezelo yesici samandla, sivimbele isivikeli ukuthi singakhubeki ngengozi, bese sigcina ukusebenza okuphephile kwezinto zikagesi endaweni ephakeme.
Isikhathi sokuthumela: Apr-13-2023