Isithando somlilo esiphakathi siya kuvelisa inani elikhulu le-harmonics ngexesha lokusetyenziswa.I-harmonics ayiyi kubangela kuphela i-resonance parallel resonance yendawo kunye ne-resonance series of the power, kodwa iphinde ikhulise umxholo we-harmonics kwaye itshise izixhobo zembuyekezo ye-capacitor kunye nezinye izixhobo.Ukongeza, i-pulse yangoku iya kubangela iimpazamo kwizixhobo zokukhusela i-relay kunye nezixhobo ezizenzekelayo, ezinokukhokelela kubhideko kumlinganiselo kunye nokuqinisekiswa kwamandla ombane.
Ungcoliseko lwe-harmonic lwegridi yamandla lubi kakhulu.Umphandle wenkqubo yamandla, iiharmonics ziya kubangela ukuphazamiseka okukhulu kwisixhobo sonxibelelwano kunye nezixhobo zombane, kwaye iiharmonics ziyingozi kakhulu kwisixhobo somlilo esiphakathi.Ke ngoko, ukuphuculwa komgangatho wamandla wesithando somlilo esiphakathi sibe yinxalenye ebalulekileyo yempendulo.
Isithando somlilo esiphakathi singumthwalo oqhelekileyo wobunjineli bamandla, oya kuvelisa inani elikhulu leeharmonics eziphambili ngexesha lenkqubo yokusebenza, ekwabizwa ngokuba yi-harmonics yesithando somlilo esiphakathi.Ubunzima bayo be-harmonic bubukhulu be-5, 7, 11 kunye namaxesha angama-13.Ubukho benani elikhulu lee-harmonics ezikumgangatho ophezulu ziya kubeka emngciphekweni ukhuseleko kunye nokusebenza kakuhle kobunjineli bamandla kunye nezixhobo zembuyekezo ye-capacitance yendlela enye yebhasi.I-transformer yesigaba esithandathu inokunciphisa i-harmonics yesihlanu neyesixhenxe eyenziwa sisithando somlilo esiphakathi, kodwa ukuba akukho manyathelo okunciphisa ahambelanayo athathiweyo, inkqubo iya kukhulisa i-harmonics, ichaphazele ukusebenza okuzinzile kwe-transformer, kwaye ibangele ukuba i-transformer ishushu kakhulu. kunye nomonakalo.
Ngoko ke, xa uhlawulela i-harmonics ye-intermediate frequency induction furnace, ingqwalasela kufuneka ihlawulwe ekupheliseni i-harmonics, ukuze kuthintelwe izixhobo zembuyekezo ekwandiseni i-harmonics ephezulu.Xa umthamo womthwalo wefrikhwensi ophakathi mkhulu, kulula ukubangela iingozi zokukhubeka kwisiphelo sombane ophezulu wesikhululo esingaphantsi kunye nokuphazamiseka kwe-harmonic kumashishini asecaleni komgca.Njengoko umthwalo utshintsha, umlinganiselo wamandla ophakathi kwiziko ngokubanzi awukwazi ukuhlangabezana nomgangatho wenkampani yethu, kwaye uya kuhlawuliswa nyanga zonke.
Qonda iingozi zeefurnas eziphezulu zokusebenzisa ulawulo lwe-harmonic, indlela yokuqinisekisa ukusebenza okuqhelekileyo kunye nobomi benkonzo yezixhobo, kunye nokuphucula ukusebenza kakuhle.
Okokuqala, inkcazo emfutshane yokhuseleko lwendalo esingqongileyo kunye nokugcinwa kwamandla okunxuseneyo kunye nothotho lweesekethe zobonelelo lwamandla eziko lokungeniswa kwesithando somlilo:
1. Xa kuthelekiswa nochungechunge okanye i-parallel circuit, i-current of the load circuit iyancitshiswa ukusuka kumaxesha angama-10 ukuya kumaxesha angama-12.Inokugcina i-3% yokusetyenziswa kwamandla okusebenza.
2. Isekethe yechungechunge ayifuni i-reactor filter enkulu, enokugcina i-1% yokusetyenziswa kwamandla.
3. I-furnace ye-melting induction nganye ixhomekeke ngokuzimeleyo liqela le-inverters, kwaye akukho mfuneko yokufakela i-high-current furnace switch yokutshintsha, ngaloo ndlela igcina i-1% yokusetyenziswa kwamandla.
4. Kuba unikezelo lombane inverter series, akukho nxalenye concave amandla ukusebenza igophe uphawu, oko kukuthi, inxalenye ilahleko yamandla, ngoko ke ixesha ukunyibilika kuncitshiswe kakhulu, imveliso iphuculwe, amandla kugcinwa, kwaye ukhuseleko lokusingqongileyo kunye nokongiwa kwamandla yi-7%.
Okwesibini, isizukulwana kunye nokwenzakala kweharmonics yesithando somlilo esiphakathi:
1. I-Parallel intermediate intermediate intermediate intermediate frequency system yesixokelelwano sombane sombane ngowona mthombo mkhulu we-harmonic kwinkqubo yamandla.Ngokuqhelekileyo, i-6-pulse intermediate intermediate electric furnace ivelisa ubukhulu be-6 kunye ne-7 iimpawu ze-harmonics, ngelixa i-12-pulse inverter ivelisa ubukhulu becala i-5, i-11 kunye ne-13 ye-harmonics.Ngokuqhelekileyo, ii-pulses ezi-6 zisetyenziselwa iiyunithi zokuguqula ezincinci kunye ne-12 pulses zisetyenziselwa iiyunithi ezinkulu zokuguqula.Icala eline-voltage ephezulu yeziguquli ezimbini zesithando somlilo lithatha amanyathelo okutshintsha kwesigaba njenge-delta eyandisiweyo okanye uqhagamshelo lwe-zigzag, kwaye isebenzisa uqhagamshelo lwesibini olunamacala amabini lenkwenkwezi ukwenza unikezelo lwamandla ombane ophakathi kwama-24 ukuze kuncitshiswe impembelelo ye-harmonics. igridi yamandla.
2. I-furnace ye-medium frequency induction iya kuvelisa i-harmonics eninzi ngexesha lokusetyenziswa, okuya kubangela ukungcoliseka okukhulu kwe-harmonic kwigridi yamandla.IHarmonics inciphisa usasazo kunye nokusetyenziswa kwamandla ombane, yenza izixhobo zombane zibe shushu, zibangele ukungcangcazela kunye nengxolo, zithobe umaleko wokugquma, zinciphise ubomi benkonzo, kwaye zibangele ukusilela okanye ukutshisa.I-Harmonics iya kubangela i-resonance yengingqi ye-resonance okanye i-resonance parallel kwinkqubo yonikezelo lwamandla, eya kwandisa umxholo we-harmonic kwaye ibangele izixhobo zembuyekezo ye-capacitor kunye nezinye izixhobo zokutshisa.
Xa imbuyekezo yamandla esebenzayo ingasetyenziswa, kuya kwenzeka isohlwayo samandla asebenzayo, okukhokelela ekunyukeni kwamatyala ombane.I-Pulse yangoku inokubangela iimpazamo kwizixhobo zokukhusela ii-relay kunye nezixhobo ezizenzekelayo, ezinokukhokelela kubhideko kumlinganiselo kunye nokuqinisekiswa kwamandla ombane.Ngaphandle kwenkqubo yonikezelo lwamandla, i-pulse yangoku iya kuba nefuthe elibi kwizixhobo zonxibelelwano kunye neemveliso zombane, ngoko ke ukuphuculwa komgangatho wamandla we-intermediate frequency induction furnace iye yaba yeyona nto iphambili.
Ixesha lokuposa: Apr-12-2023