Ngokukhula okukhawulezileyo koqoqosho lwelizwe lethu, ingakumbi ukukhula ngokukhawuleza kwemigodi, ukunyibilikisa kunye nemizi-mveliso yokunyibilika kwenkunkuma kwiminyaka yakutshanje, imfuneko yombane iyakhula.Phakathi kwazo, isixhobo esiphakathi sokunyibilikisa isithando somlilo sesinye sezona zixhobo zikhulu zokuvelisa amandla eharmonic, kodwa ngenxa yokuba uninzi lwabavelisi banciphisa iindleko zemveliso kwaye bangafaki izixhobo zobuchwepheshe boxinzelelo lwe-harmonic, igridi yamandla kawonke-wonke yangoku ingcoliswe kakhulu yi-harmonics njengemozulu yenkungu.I-Pulse yangoku inciphisa ukusetyenzwa, ukuhanjiswa kunye nokusetyenziswa kwamandla ombane, ukutshisa kakhulu izixhobo zombane, kubangela ukungcangcazela kunye nengxolo, ukugquma iminyaka, kunciphisa ubomi benkonzo, kwaye kubangele ukusilela okanye ukutshisa.I-Harmonics inokubangela i-resonance parallel resonance yendawo okanye i-resonance ye-resonance yenkqubo yamandla, ngaloo ndlela yandisa umxholo we-harmonic kwaye ibangele ukuba i-capacitors itshise kunye nezinye izixhobo.I-Harmonics inokubangela ukusetyenziswa kakubi kweereyilayi zokukhusela kunye nezixhobo ezizenzekelayo kunye nokubhidanisa imilinganiselo yamandla.I-Harmonics ngaphandle kwenkqubo yamandla inokuphazamisa kakhulu izixhobo zonxibelelwano kunye nezixhobo zombane.
Isithando somlilo esiphakathi esiphakathi sesinye semithombo emikhulu ye-harmonic kumthwalo wegridi, kuba iguqulwa ibe ngamaza aphakathi emva kokulungiswa.I-Harmonics iya kubeka emngciphekweni kakhulu ukusebenza ngokukhuselekileyo kwegridi yamandla.Ngokomzekelo, i-harmonic yangoku iya kubangela ilahleko eyongezelelweyo ye-vortex yentsimbi ephezulu-frequency ephezulu kwi-transformer, eya kubangela ukuba i-transformer igqithise kakhulu, inciphise umthamo wemveliso ye-transformer, ikhulise ingxolo ye-transformer, kwaye ibeka engozini ubomi benkonzo ye-transformer. .Umphumo wokubambelela we-harmonic currents unciphisa i-cross-section ye-conductor rhoqo kwaye ukwandisa ukulahleka komgca.I-voltage ye-Harmonic ichaphazela ukusebenza okuqhelekileyo kwezinye izixhobo zombane kwigridi, ibangela iimpazamo zokusebenza kwizixhobo zokulawula ngokuzenzekelayo kunye nokuqinisekiswa kokulinganisa okungachanekanga.I-voltage ye-Harmonic kunye ne-current ichaphazela ukusebenza okuqhelekileyo kwezixhobo zonxibelelwano ze-peripheral;ukugqithisa okwexeshana kunye nokugqithisa okwethutyana okubangelwa yi-harmonics yonakalisa i-insulation layer yomatshini kunye nezixhobo, okukhokelela kwiimpazamo zesigaba esithathu kunye nomonakalo kwi-transformers;amandla ombane we-harmonic kunye nesixa sangoku siya kubangela i-resonance yochungechunge oluyinxenye kunye ne-resonance efanayo kwigridi yamandla oluntu, okukhokelela kwiingozi ezinkulu.Kwinkqubo yokubambelela kwiinguqu eziqhubekayo, into yokuqala yokufumana kwi-DC yi-square wave wave power supply, elingana ne-superposition ye-harmonics ephezulu.Nangona i-circuit kamva idinga ukuhluzwa, i-harmonics ye-high-order ayinakuhluzwa ngokupheleleyo, isizathu sokuvelisa i-harmonics.
Siyile izihluzi ezilungelelanisiweyo ezi-5, 7, 11 kunye namaxesha ali-13.Phambi kwembuyekezo yesihluzi, amandla enqanaba lokunyibilika kwesithando sombane esiphakathi somsebenzisi yi-0.91.Emva kokuba isixhobo sembuyekezo yesihluzi sifakwe ekusebenzeni, imbuyekezo ephezulu yi-0.98 capacitive.Emva kokuqhuba isixhobo sembuyekezo yokucoca, ireyithi ye-voltage distortion rate (ixabiso leTHD) yi-2.02%.Ngokomgangatho wamandla omgangatho we-GB/GB/T 14549-1993, ixabiso le-voltage harmonic (10KV) lingaphantsi kwe-4.0%.Emva kokucoca i-5th, 7th, 11th kunye ne-13 ye-harmonic yangoku, izinga lokuhluza limalunga ne-82∽84%, lifikelela kwixabiso elivumelekileyo lomgangatho wenkampani yethu.Isiphumo esihle sokucoca imbuyekezo.
Ngoko ke, kufuneka sihlalutye izizathu ze-harmonics kwaye sithathe amanyathelo okucinezela i-harmonics ephezulu, ebalulekileyo ekuqinisekiseni ukusebenza okukhuselekileyo kunye noqoqosho lweenkqubo zamandla.
Okokuqala, imbangela ye-harmonics yesithando somlilo esiphakathi
1. I-Harmonics iveliswa yimithwalo engahambelaniyo, njenge-silicon elawulwayo ehlaziyiweyo, ukutshintshwa kwamandla ombane, njl njl.Ngokomzekelo, i-three-phase six-pulse rectifier ivelisa i-harmonics ye-5 kunye ne-7, ngelixa i-three-phase 12-pulse rectifier ivelisa i-11th kunye ne-13th harmonics.
2. Ngenxa ye-harmonics eveliswa yimithwalo ye-inverter efana ne-furnaces ephakathi kunye ne-inverters, kungekhona nje i-harmonics edibeneyo eyenziwayo, kodwa kunye ne-harmonics ye-fractional ene-frequency ephindwe kabini ye-inverter.Ngokomzekelo, isithando somlilo esiphakathi esisebenza kwi-820 Hz usebenzisa i-rectifier yesigaba sesithandathu se-pulse ayivelisi kuphela i-5th kunye ne-7th harmonics, kodwa kunye ne-harmonics ye-fractional kwi-1640 Hz.
I-Harmonics ikhona kunye negridi kuba iijeneretha kunye nabaguquli bavelisa ixabiso elincinci le-harmonics.
2. Ingozi ye-harmonics kwisithando somlilo esiphakathi
Ekusetyenzisweni kwee-furnaces eziphakathi, inani elikhulu le-harmonics liyenziwa, elikhokelela ekungcolisekeni okukhulu kwe-harmonic yegridi yamandla.
1. I-harmonics ephezulu iya kuvelisa i-voltage ye-surge okanye yangoku.Impembelelo yokunyuka ibhekiselele kwixesha elifutshane ngaphezulu kombane (ophantsi) wenkqubo, oko kukuthi, i-pulse ekhawulezileyo yombane engagqithiyo kwi-millisecond e-1.Le pulse ingaba positive okanye negative, kwaye ingaba nothotho okanye i-oscillatory nature, ebangela ukuba isixhobo sitshise.
2. I-Harmonics inciphisa ukuhanjiswa kunye nokusetyenziswa kwamandla ombane kunye nezixhobo ze-thermoelectric, ivelise i-vibration kunye nengxolo, yenza imida yayo ubudala, inciphise ubomi benkonzo, kunye nokungasebenzi kakuhle okanye ukutshisa.
3. Ichaphazela izixhobo zembuyekezo yamandla asebenzayo enkqubo yonikezelo lombane;xa kukho i-harmonics kwigridi yamandla, i-voltage ye-capacitor iyanda emva kokuba i-capacitor ifakwe, kwaye i-current ngokusebenzisa i-capacitor iyanda ngakumbi, okwandisa ukulahlekelwa kwamandla e-capacitor.Ukuba umxholo we-pulse wangoku uphezulu, i-capacitor iya kuba ngaphezulu-ngoku kwaye ilayishwe, eya kugqithisa i-capacitor kwaye ikhawuleze i-embrittlement ye-edge material.
4. Oku kuya kunciphisa isantya kunye nobomi benkonzo yezixhobo zombane kunye nokwandisa ilahleko;ichaphazela ngokuthe ngqo umthamo wokusetyenziswa kunye nesantya sokusetyenziswa kwe-transformer.Ngelo xesha, kuya kwandisa ingxolo ye-transformer kwaye inciphise kakhulu ubomi benkonzo ye-transformer.
5. Kwiindawo ezinemithombo emininzi ye-harmonic kwigridi yamandla, kwanokuba nenani elikhulu lokuphuka kwee-capacitors ze-elektroniki zangaphakathi nangaphandle zenzeke, kwaye i-capacitors kwi-substation yatshisa okanye ikhutshiwe.
6. I-Harmonics inokubangela ukukhuselwa kwe-relay kunye nokusilela kwesixhobo esizenzekelayo, okukhokelela ekubhidekeni kumlinganiselo wamandla.Lo ngumphandle wenkqubo yamandla.I-Harmonics ibangela ukuphazamiseka okukhulu kwizixhobo zonxibelelwano kunye nezixhobo zombane.Ke ngoko, ukuphucula umgangatho wamandla wesithando somlilo esiphakathi kube yeyona nto iphambili yokuphendula.
Isithathu, indlela yokulawula i-harmonic yesithando somlilo esiphakathi.
1. Ukuphucula umthamo wesiphaluka esifutshane kwindawo yoqhagamshelo loluntu lwegridi yamandla kunye nokunciphisa i-harmonic impedance yenkqubo.
2. Imbuyekezo yangoku yeHarmonic ithatha isihluzo se-AC kunye nesihluzo esisebenzayo.
3. Ukwandisa inani le-pulse yezixhobo zokuguqula ukunciphisa i-harmonic current.
4. Gwema i-resonance ye-parallel capacitors kunye noyilo lwe-system inductance.
5. Isixhobo sokuthintela i-high-frequency blocking sidibaniswe kwi-series kwi-high-voltage DC transmission line ukuthintela ukusasazwa kwee-harmonics eziphezulu.
7. Khetha imo ye-wiring ye-transformer efanelekileyo.
8. Isixhobo sifakwe kwiqela lonikezelo lwamandla, kwaye isixhobo sokucoca sifakwe.
Isine, isixhobo sokulawula isithando somlilo esiphakathi
1. Isixhobo sokucoca i-Hongyan passive.
Isixhobo sokucoca iHongyan.Ukhuseleko luluhlu lwe-capacitor resistor, kwaye i-passive filter yenziwe nge-capacitor kunye ne-resistor kwi-series, kwaye ukulungiswa kuxhunyiwe kwinqanaba elithile.Kwi-frequency ekhethekileyo, i-loop ye-impedance ephantsi yenziwa, njenge-250HZ.Esi sisihluzo sesihlanu se-harmonic.Indlela inokuhlawulela zombini i-harmonics kunye namandla asebenzayo, kwaye inesakhiwo esilula.Nangona kunjalo, eyona nto ibalulekileyo yale ndlela kukuba imbuyekezo yayo ichaphazeleka kukuphazamiseka kwegridi kunye nombuso osebenzayo, kwaye kulula ukuhlaziya ngokuhambelana nenkqubo, okukhokelela ekukhuliseni i-harmonic, ukulayisha ngaphezulu kunye nomonakalo kwikristale yolwelo. isihluzo.Kwimithwalo eyahluka kakhulu, kulula ukubangela ukuhlawula ngaphantsi okanye ukuhlawula ngaphezulu.Ukongeza, inokuhlawula kuphela i-harmonics esisigxina, kwaye umphumo wembuyekezo awufanelekanga.
2. Izixhobo zokucoca ezisebenzayo zaseHongyan
Izihlungi ezisebenzayo zibangela imisinga ye-harmonic yobukhulu obulinganayo kunye ne-antiphase.Qinisekisa ukuba umsinga kwicala lonikezelo lwamandla liza lesine.Ingcamango esisiseko kukudala imbuyekezo yangoku ngamandla afanayo kunye nomthwalo we-harmonic wangoku kunye nokubuyisela umva isikhundla, kunye nokunciphisa imbuyekezo yangoku kunye nomthwalo we-harmonic wangoku ukucima i-pulse current.Le yindlela yokuphelisa imveliso ye-harmonic, kwaye umphumo wokucoca ungcono kunezihluzo ze-passive.
3. Hongyan Harmonic uMkhuseli
Umkhuseli we-harmonic ulingana ne-capacitor series reactance.Ngenxa yokuba i-impedance iphantsi kakhulu, umsinga uya kuhamba apha.Oku kukwahlulwa kwe-impedance, ngoko ke i-harmonic yangoku efakwe kwinkqubo isonjululwe.
Izikhuseli zeHarmonic zihlala zifakwe phambi kwezixhobo ezibuthathaka.Ziyimveliso ekumgangatho ophezulu yokulawula i-harmonic, enokumelana nempembelelo yokunyuka, ukufunxa i-2 ~ 65 amaxesha aphezulu e-harmonics, kunye nokukhusela izixhobo.Ukulawulwa kwe-Harmonic yeenkqubo zokulawula izibane, iikhomputha, iithelevishini, izixhobo zokulawula isantya semoto, izixhobo zombane ezingenakuphazamiseka, izixhobo zomatshini we-CNC, izixhobo zokulungisa, izixhobo ezichanekileyo, kunye neendlela zokulawula i-elektroniki.Zonke ezi zi-harmonics eziveliswa zizixhobo zombane ezingenayo umgca zingabangela ukungaphumeleli kwinkqubo yokusabalalisa ngokwayo okanye kwizixhobo ezixhunyiwe kwinkqubo.Umkhuseli we-harmonic unokuphelisa i-harmonics kumthombo wokuvelisa amandla, kwaye asuse ngokuzenzekelayo i-harmonics ephezulu, ingxolo ephezulu-frequency, i-pulse spikes, i-surges kunye nezinye iziphazamiso kwizixhobo zombane.Umkhuseli we-harmonic unokuhlambulula unikezelo lwamandla, ukukhusela izixhobo zombane kunye nezixhobo zembuyekezo yamandla, uthintele umkhuseli ekukhubekeni ngengozi, emva koko agcine ukusebenza okukhuselekileyo kwezixhobo zombane kwindawo ephezulu.
Ixesha lokuposa: Apr-13-2023