Nekukurumidza kusimukira kwehupfumi hwenyika yedu, kunyanya kukurumidza kukura kwemaindasitiri emigodhi, ekunyungudutsa nekukanda maindasitiri mumakore achangopfuura, kudiwa kwemagetsi kuri kuwedzera.Pakati pavo, iyo yepakati frequency kunyungudutsa choto chekugadzirisa midziyo ndeimwe yemhando huru yemagetsi ekugadzira magetsi, asi nekuti vazhinji vanogadzira vanodzikisa mutengo wezvigadzirwa uye havaisi harmonic kudzvinyirira tekinoroji zvivakwa, iyo iripo yeruzhinji magetsi grid yakasvibiswa zvakanyanya neharmonics senge haze weather.Pulse yazvino inoderedza kugadzirisa, kutapurirana uye kushandiswa kwesimba remagetsi, inopisa midziyo yemagetsi, inokonzeresa kudedera uye ruzha, kuvharirwa kwemazera, kupfupisa hupenyu hwesevhisi, uye kunyange kukonzera kutadza kana kupisa.Harmonics inogona kukonzera yemuno parallel resonance kana nhevedzano resonance yesimba system, nekudaro ichiwedzera iyo harmonic yemukati uye ichikonzera kupisa ma capacitor nemimwe michina.Harmonics inogona zvakare kukonzera misoperation yekudzivirira relay uye otomatiki zvishandiso uye kuvhiringa zviyero zvesimba.Harmonics kunze kwesimba remagetsi inogona kukanganisa zvakanyanya nemidziyo yekutaurirana nemidziyo yemagetsi.
Iyo yepakati frequency yemagetsi vira ndeimwe yeakanyanya harmonic masosi mumutoro wegridi, nekuti inoshandurwa kuita yepakati frequency mushure mekugadzirisa.Harmonics ichaisa mungozi zvakanyanya kushanda kwakachengeteka kwegedhi remagetsi.Semuyenzaniso, harmonic yazvino inokonzeresa yakawedzera-frequency vortex iron kurasikirwa mutransformer, izvo zvichaita kuti transformer iwedzere kupisa, kuderedza kubuda kwevhoriyamu yetransformer, kuwedzera ruzha rwetransformer, uye kukanganisa zvakanyanya hupenyu hwesevhisi. .Iyo inonamatira mhedzisiro ye harmonic currents inoderedza inogara ichiyambuka-chikamu che conductor uye inowedzera kurasikirwa kwemutsara.Harmonic voltage inokanganisa kushanda kwakajairwa kwezvimwe midziyo yemagetsi pane grid, zvichikonzera zvikanganiso zvekushanda mu otomatiki kudzora michina uye isina kurongeka kuyerwa kwechokwadi.Harmonic voltage uye yazvino inokanganisa kushanda kwakajairwa kwemidziyo yekutaurirana;kuwedzeredza kwechinguvana uye kuwedzeredza kwechinguvana kunokonzerwa neharmonics kukuvadza iyo insulation layer yemuchina nemidziyo, zvichikonzera matatu-chikamu chepfupi-yedunhu kukanganisa uye kukuvadza kune transformer;harmonic voltage uye Huwandu hwemazuva ano huchakonzera chikamu chakatevedzana resonance uye parallel resonance mugedhi remagetsi eruzhinji, zvichikonzera tsaona huru.Mukuita kwekuomerera kune zvinogara zvichichinja, chinhu chekutanga kuwana kubva kuDC is square wave magetsi emagetsi, ayo akaenzana nepamusoro-soro ye-harmonics.Kunyange zvazvo dunhu rekupedzisira richida kucheneswa, ma-harmonics epamusoro-soro haakwanisi kucheneswa zvachose, ndicho chikonzero chekugadzirwa kweharmonics.
Isu takagadzira mafirita akasarudzika e5, 7, 11 uye 13 nguva.Pamberi pemuripo wefirita, iyo simba chinhu chechikamu chekunyunguduka chemushandisi wepakati frequency yemagetsi furefu ndeye 0.91.Mushure mesefa yekubhadhara mudziyo waiswa mukushanda, iyo yakanyanya muripo ndeye 0.98 capacitive.Mushure mekushandisa sefa yekubhadhara mudziyo, iyo yakazara voltage distortion rate (THD kukosha) ndeye 2.02%.Zvinoenderana nemagetsi emhando yepamusoro GB/GB/T 14549-1993, iyo voltage harmonic (10KV) kukosha iri pasi pe4.Mushure mekusefa iyo yechishanu, yechinomwe, yechi11 uye yechi13 yeharmonic yazvino, mwero wekusefa ungangoita 82∽84%, uchisvika pamutengo unobvumidzwa wechiyero chekambani yedu.Good compensation filter effect.
Naizvozvo, isu tinofanirwa kuongorora zvinokonzeresa harmonics uye kutora matanho ekudzvanya yakakwira-yakarongeka maharmonics, izvo zvakakosha kuve nechokwadi chekuchengetedza uye nehupfumi kushanda kwemasisitimu emagetsi.
Kutanga, chikonzero cheharmonics yepakati frequency furnace
1. Harmonics inogadzirwa nemitoro isina-mutsara, yakadai sesilicon controlled rectifiers, kushandura magetsi emagetsi, nezvimwewo. Harmonic frequency inogadzirwa nemutoro uyu ndeye nhamba yakawanda yehuwandu hwekushanda.Semuenzaniso, matatu-phase matanhatu-pulse rectifier inonyanya kuburitsa 5th uye 7th harmonics, nepo matatu-phase 12-pulse rectifier inonyanya kuburitsa 11th uye 13th harmonics.
2. Nekuda kweiyo harmonics inogadzirwa ne inverter mitoro yakadai seyepakati frequency furnaces uye inverters, kwete chete integral harmonics inogadzirwa, asiwo mafractional harmonics ayo frequency akapetwa kaviri frequency ye inverter.Semuyenzaniso, yepakati frequency choto inoshanda pa820 Hz ichishandisa matatu-phase matanhatu-pulse rectifier inoburitsa kwete chete 5th uye 7th harmonics, asiwo mafractional harmonics pa1640 Hz.
Harmonics inogara pamwe chete negridi nekuti majenareta uye matransformer anogadzira mashoma mashoma eharmonics.
2. Kukuvadza kweharmonics muchoto chepakati chepakati
Mukushandiswa kwemafuremu epakati epakati, nhamba huru yeharmonics inogadzirwa, izvo zvinotungamira mukusvibiswa kwakakomba kweharmonic kwegidhi remagetsi.
1. Higher harmonics ichaita surge voltage kana ikozvino.Surge impact inoreva kupfupi-pfupi pamusoro pe (yakaderera) voltage yegadziriro, kureva kuti, pakarepo kuputika kwevoltage isingapfuure 1 millisecond.Kutsikirira uku kunogona kuve kwakanaka kana kushata, uye kunogona kuve neyakatevedzana kana oscillatory nature, zvichiita kuti mudziyo upise.
2. Harmonics inoderedza kutapurirana uye kushandiswa kwesimba remagetsi uye thermoelectric midziyo, inogadzira vibration uye ruzha, inoita mipendero yaro zera, kuderedza hupenyu hwebasa, uye kunyange kusashanda kana kupisa.
3. Inobata simba rekugadzirisa magetsi ekugadzirisa magetsi emagetsi emagetsi;kana pane harmonics mumagetsi emagetsi, iyo voltage ye capacitor inowedzera mushure mokunge capacitor yaiswa, uye ikozvino kuburikidza ne capacitor inowedzera zvakanyanya, izvo zvinowedzera kurasikirwa kwesimba kwe capacitor.Kana iyo pulse ikozvino yakakwira, iyo capacitor ichave yakawandisa-ikozvino uye yakatakurwa, iyo inozopisa iyo capacitor uye kukurumidza kukwidziridzwa kwezvinhu zvemupendero.
4. Izvi zvichaderedza kukurumidza uye hupenyu hwebasa remidziyo yemagetsi uye kuwedzera kurasikirwa;inobata zvakananga simba rekushandisa uye chiyero chekushandisa che transformer.Panguva imwecheteyo, ichawedzerawo ruzha rwekushandura uye kupfupisa zvikuru hupenyu hwebasa remushanduri.
5. Munzvimbo dzine zvakawanda zveharmonic zvinyorwa mumagetsi emagetsi, kunyange nhamba huru yekuputsika kwemukati nekunze kwemagetsi capacitors yakaitika, uye capacitors mu substation yakatsva kana kuputsika.
6. Harmonics inogonawo kukonzera kuchengetedzwa kwerelay uye otomatiki kifaa kutadza, zvichikonzera kuvhiringidzika mukuyera kwesimba.Iyi ndiyo yekunze kwesimba remagetsi.Harmonics inokonzera kukanganisa kwakakomba kumidziyo yekutaurirana uye zvigadzirwa zvemagetsi.Naizvozvo, kuvandudza kunaka kwesimba repakati frequency choto chave chinonyanya kutarisisa chemhinduro.
Yetatu, yepakati frequency furnace harmonic yekudzora nzira.
1. Kuvandudza iyo pfupi-yedunhu simba reruzhinji rekubatanidza nzvimbo yemagetsi grid uye kuderedza harmonic impedance yehurongwa.
2. Harmonic ikozvino muripo inotora AC sefa uye inoshanda sefa.
3. Wedzera pulse nhamba ye converter midziyo kuderedza harmonic ikozvino.
4. Dzivisa resonance yeparallel capacitors uye dhizaini yehurongwa inductance.
5. Iyo yepamusoro-frequency blocking device yakabatanidzwa munhevedzano pa-high-voltage DC transmission line kuti ivhare kupararira kwe-high-order harmonics.
7. Sarudza yakanaka transformer wiring mode.
8. Midziyo yacho yakarongedzerwa kugovera magetsi, uye mudziyo wekusefa unoiswa.
Ina, yepakati frequency furnace harmonic control equipment
1. Hongyan passive sefa mudziyo.
Hongyan passive sefa mudziyo.Dziviriro ndeye capacitor series resistor, uye passive filter inoumbwa ne capacitor uye resistor munhevedzano, uye kugadzirisa kwakabatana kune imwe nhanho.Pane yakasarudzika frequency, yakaderera impedance loop inogadzirwa, senge 250HZ.Ichi chishanu cheharonic sefa.Iyo nzira inogona kubhadharira zvese harmonics uye reactive simba, uye ine yakapusa chimiro.Zvisinei, kukanganisa kukuru kweiyi nzira ndeyokuti kubhadharwa kwayo kunokonzerwa nekukanganiswa kwegridi uye mamiriro ekushanda, uye zviri nyore kupindirana pamwe chete nehurongwa, zvichiita kuti harmonic amplification, kuwandisa uye kunyange kukanganisa kumvura crystal. sefa.Kune mitoro inosiyana zvakanyanya, zviri nyore kukonzera undercompensation kana overcompensation.Mukuwedzera, inogona kungobhadhara yakagadziriswa frequency harmonics, uye muripo wekuita hauna kunaka.
2. Hongyan inoshanda sefa midziyo
Masefa anoshanda anokonzera harmonic currents ehukuru hwakaenzana uye antiphase.Ita shuwa kuti ikozvino padivi rekupa magetsi iine wave.Pfungwa huru ndeyekugadzira muripo wezvino ine simba rakafanana nerekuremerwa harmonic ikozvino uye kudzosera chinzvimbo, uye kudzoreredza muripo wezvino nemutoro weharmonic ikozvino kujekesa pulse ikozvino.Ichi chigadzirwa harmonic ekubvisa nzira, uye kusefa mhedzisiro iri nani pane passive mafirita.
3. Hongyan Harmonic Mudziviriri
Iyo harmonic inodzivirira yakaenzana ne capacitor series reactance.Nekuti iyo impedance yakadzikira, yazvino ichayerera pano.Uku ndiko kupatsanurwa kwe impedance, saka iyo harmonic yazvino yakaiswa muhurongwa inogadziriswa.
Harmonic vadziviriri vanowanzoiswa pamberi pemidziyo yakapfava.Iwo emhando yepamusoro harmonic kudzora zvigadzirwa, izvo zvinogona kuramba kuvhiyiwa, kutora 2 ~ 65 nguva dzakakwirira harmonics, uye kudzivirira michina.Harmonic control yemagetsi ekudzora masisitimu, makomputa, terevhizheni, mota yekumhanya yekudzora midziyo, isingachinjiki magetsi emagetsi, CNC muchina maturusi, rectifiers, chaiyo zviridzwa, uye zvemagetsi kudzora maitiro.Ese aya maharmonics anogadzirwa neasina-mutsara emagetsi emagetsi anogona kukonzera kutadza muhurongwa hwekugovera pachayo kana mumidziyo yakabatana nehurongwa.Mudziviriri weharmonic anogona kubvisa maharmonics pamagetsi ekugadzira magetsi, uye obva abvisa yakakwira-yakarongeka maharmonics, ruzha rwepamusoro-ruzha, pulse spikes, masurges uye kumwe kuvhiringidza kumidziyo yemagetsi.Mudziviriri weharmonic anogona kuchenesa magetsi, kudzivirira midziyo yemagetsi uye magetsi ekugadzirisa zvinhu, kudzivirira mudziviriri kubva pakugumburwa netsaona, uyezve kuchengetedza kushanda kwakachengeteka kwemidziyo yemagetsi munzvimbo yakakwirira.
Nguva yekutumira: Kubvumbi-13-2023