Ruzivo rwekutanga rwevashandisi
Kambani yekukanda vharafu yegedhi inonyanya kugadzira zvigadzirwa zvevharuvhu.Michina yekugadzira yekambani yekugadzira inosanganisira seti ye2-ton yepakati-frequency induction furnace, iyo inofambiswa ne2000 kVA (10KV/0.75 kVA) inyanzvi inoshandura magetsi emagetsi system.Yakashongedzwa ne 2 capacitance compensation makabati ane volume ye600 kVA, 1-ton yepakati frequency induction furnace, 800 kVA (10KV/0.4KV) matransformer ehunyanzvi nehunyanzvi, uye capacitance compensation cabinet ine volume ye300 kVA.Iyo dhizaini yemagetsi system dhizaini ndeiyi inotevera:
Data chaiyo yekushandisa
Simba rinoratidzika repakati frequency induction furnace ine 2000KVA transformer iri 700KVA-2100KVA, iro rinoshanda simba P=280KW-1930KW, iro rinoshanda mutoro iri Q=687KAR-830KAR, simba chinhu PF=0.4-0.92, uye ikozvino mukushandaⅰ = 538 A-1660 A, iro rinoonekwa simba repakati frequency induction furnace ine 800KVA transformer i200KVA-836KVA.Simba rinoshanda iP = 60KW-750KW, iyo reactive load ndeye Q=190KAR-360KAR, iyo simba chinhu PF = 0.3-0.9, uye kushanda ikozvino i = 288 A-1200 A. Nokuti iyo capacitor compensation cabinet haigoni kuiswa mukushanda (otomatiki muripo unotadza, kana capacitor ichiiswa pamaoko, ruzha rwecapacitor haruna kujaira, rwendo rwedunhu rinopwanya, capacitor yakarongedzerwa, mafuta akadonhedza, akatsemuka, uye haagone kushandiswa), iyo mwedzi nemwedzi simba rakakwana. PF = 0.78, uye mubereko wepamwedzi wemortgage inogadziridzwa kusvika kudarika 32,000 yuan.
Simba System Situation Analysis
Mutoro mukuru weyepakati frequency yemagetsi furnace rectifier simba rekupa 6-pulse rectification.Iyo yekugadziridza midziyo inoshandura AC kuita DC uku ichigadzira nhamba huru yeharmonics.Iyo yakajairwa harmonic sosi harmonic yazvino inopinzwa mugedhi, uye iyo impedance yegidhi inogadzira harmonic voltage, zvichikonzera grid voltage Ikozvino kukanganisa kunokanganisa kunaka kwemagetsi uye kuchengetedzeka kwekushanda, kunowedzera kurasikirwa kwemutsara uye voltage offset, uye inowedzera simba.Kana iyo reactive power compensation capacitor bank inoiswa mukushanda, nekuti iyo harmonic hunhu impedance yebhangi capacitor idiki, maharmonics mazhinji anounzwa mucapacitor bank, uye huwandu hwecapacitive ikozvino Kuwedzera kwekukurumidza kunokanganisa zvakanyanya hupenyu hwesevhisi.Kune rimwe divi, kana iyo harmonic capacitive reactance ye capacitor bank yakaenzana neyakaenzana harmonic inductive reactance yehurongwa uye nhevedzano resonance inoitika, iyo harmonic ikozvino yakawedzera zvakanyanya (2-10 nguva), zvichikonzera kupisa uye kukuvadza iyo capacitor.Uye zvakare, iyo harmonics ichaita kuti iyo DC sinusoidal wave ichinje, zvichikonzera sawtooth peak wave, izvo zviri nyore kukonzeresa kusarura kwechikamu mune insulating zvinhu.Kubuda kwenguva refu kwechikamu kunosimudzirawo kuchembera kwezvinhu zvinodzivirira uye kukonzeresa kukuvara kwecapacitor nyore.Naizvozvo, iyo capacitor reactive power compensation cabinet haigone kushandiswa kubhadharisa yepakati frequency induction furnace, uye sefa reactive simba rekubhadhara mudziyo une pulse ikozvino kudzvinyirira basa rinofanira kusarudzwa.
Reactive simba muripo wekurapa chirongwa
Zvinangwa zveutongi
Dhizaini yemafirita muripo wemidziyo inosangana nezvinodiwa zveharmonic kudzvinyirira uye reactive simba kudzvinyirira manejimendi.
Pasi pemashandisirwo e0.75KV uye 0.4KV masisitimu, mushure mekunge sefa yekubhadhara midziyo yaiswa mukushanda, iyo pulse current inodzvinyirirwa, uye mwedzi wega wega simba remagetsi rinopfuura 0.95.Iko kupinza kwesefa yekubhadhara loop hakuzokonzerese pulse current resonance kana resonance overvoltage uye overcurrent.
Dhizaini Inotevera Mitemo
Hunhu hwesimba Public grid harmonics GB/T14519-1993
Simba remhando Voltage fluctuation uye flicker GB12326-2000
General tekinoroji mamiriro eyakaderera-voltage reactive simba muripo mudziyo GB/T 15576-1995
Low-voltage reactive power compensation device JB/T 7115-1993
Reactive simba muripo wehunyanzvi mamiriro;JB/T9663-1999 "Low-voltage reactive power automatic compensation controller"
Miganhu yeharmonic ikozvino inoburitswa neakaderera-voltage magetsi uye emagetsi midziyo GB/T 17625.7-1998 Electrotechnical mazwi Power capacitors GB/T 2900.16-1996
Low voltage shunt capacitor GB/T 3983.1-1989
Reactor GB10229-88
Reactor IEC 289-88
Low-voltage reactive power compensation controller order tekinoroji mamiriro DL/T597-1996
Low-voltage magetsi enclosure giredhi yekudzivirira GB5013.1-1997
Yakaderera-voltage yakakwana switchgear uye kudzora midziyo GB7251.1-1997
Mazano ekugadzira
Zvinoenderana nemamiriro ezvinhu ekambani, kambani yedu yakagadzira seti yakadzama yepakati frequency induction furnace reactive power compensation filter scheme.Nyatsofunga nezvesimba remutoro chinhu uye kudzvanyirirwa kweharmonic, uye isa seti yeyakaderera-voltage reactive simba muripo mafirita padivi revoltage padivi rekambani 0.75KV uye 0.4KV matransformer kudzvanyirira maharmonics, kubhadhara reactive simba, uye kugadzirisa simba chinhu.Munguva yekushanda kwechoto chepakati chefuru, mudziyo wekugadzirisa unogadzira 6K + 1 harmonics, uye Fourier series inoshandiswa kuora uye kushandura ikozvino kuti ibudise 5 harmonics ye250HZ uye 7 harmonics pamusoro pe350HZ.Naizvozvo, pakugadzira iyo sefa isingaite muripo weiyo frequency choto, inofanirwa kuve nechokwadi kuti iyo sefa muripo webazi redunhu inotsiva iyo isingashande simba nekudzvanyirira zvine hungwaru kupindirana kwema frequency pamusoro pe250HZ uye 350HZ, uye inowedzera simba chinhu.
dhizaini basa
Iyo yakazara simba chinhu che2-ton yepakati frequency induction furnace inofananidzwa ne2000 kVA transformer inobhadharwa kubva pa0.78 kusvika 0.95.Chishandiso chemuripo wesefa chinoda kuve chakashongedzerwa nehuremu hwe820 kVA, uye chinoshandura otomatiki kuita mapoka matanhatu ehunyanzvi, rimwe nerimwe richienderana nemhepo iri pazasi voltage padivi retransformer kuti muripo.Iyo giredhi giredhi gadziriso inokwana 60KVAR, iyo inogona kusangana akasiyana emagetsi zvinodiwa zvepakati frequency induction choto.Iyo yakazara simba chinhu che 1 ton yepakati frequency induction furnace inofananidzwa ne800 kVA transformer inobhadharwa kubva 0.78 kusvika 0.95.Iyo sefa yemuripo wemidziyo inoda kuve yakashongedzerwa nehuremu hwe360 kVA, iyo inogona kushandurwa otomatiki kuita 6 mapoka ehukuru, uye iyo yakagadziridzwa giredhi dhizaini i50 kVA, iyo inogona kusangana neakasiyana emagetsi zvinodiwa zvepakati frequency induction choto.Iyi mhando yedhizaini inovimbisa zvizere kuti iyo yakagadziriswa simba chinhu yakakwira kupfuura 0.95.
Effect analysis mushure mekuiswa kwefirita muripo
Mukutanga kwaChikumi 2010, iyo yepakati frequency furnace sefa reactive simba rekubhadhara mudziyo yakaiswa uye yakaiswa mukushanda.Midziyo yacho inoteedzera kuchinja kwemutoro wepakati frequency induction furnace, inobhadhara zvakanyanya reactive mutoro, uye inovandudza simba chinhu.mashoko sezvinotevera:
Nguva yekutumira: Kubvumbi-14-2023