Rolling mill (cold rolling) case

Ruzivo rwekutanga rwevashandisi
Kambani inokungurutsa simbi inogadzira cheni dzakakora 0.5mm.Iyo kambani ine mitsara mina yekugadzira, inosanganisira 1 ye650 simbi zvigayo uye 3 ye450 michina yesimbi.Simba rekutyaira rine chikamu rinofambiswa neDC brushless motors, uye 3 seti dze1250KVA transformers uye 630KVA..Iyo dhizaini yemagetsi system dhizaini ndeiyi inotevera:

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Data chaiyo yekushandisa
Avhareji simba chinhu cheiyo 1250KVA transformer iPF = 0.62, iyo inoshanda ikozvino ye1960A uye 630KVA transformer i700KVA, avhareji simba chinhu PF = 0.62, kushanda ikozvino 1050A, ese ma transformer akawandisa, uye pulse ikozvino. iri 5 nguva, ikozvino vhoriyamu shanduko reshiyo iri 18.5%.

Simba System Situation Analysis
Mutoro mukuru weDC brushless mota ballast ndeye 6 single-pulse ballasts.Iyo ballast midziyo inogadzira huwandu hukuru hwepulse ikozvino muAC, AC, uye DC mashandiro.Ndiyo yakajairika pulse ikozvino sosi.Painounzwa mugedhi remagetsi, iyo harmonic ikozvino Iyo pulse ikozvino inoshanda voltage inokonzereswa kune hunhu impedance yesimba network, zvichikonzera kunze-kwe-frame yekushanda voltage uye ikozvino, iyo inoisa mungozi kunaka uye kuchengetedzwa kwekushanda. yemagetsi ekuchinja, inowedzera kurasikirwa kwemutsara uye kushanda kwemagetsi kutsauka, uye ine kukanganisa kwakashata pane network yemagetsi nemidziyo yemagetsi pachayo.Naizvozvo, muripo weiyo brushless DC mota inofanirwa kushandisa yakaderera-voltage reactive simba muripo weiyo pulse ikozvino kudzvanya sefa kutsiva reactive mutoro, kunatsiridza simba chinhu, uye haizopihwe chirango nesimba rinoita kuti iwedzere kubuda kweiyo transformer. .

Sefa reactive simba muripo wekurapa chirongwa
Zvinangwa zveutongi
Dhizaini yemafirita muripo wemidziyo inosangana nezvinodiwa zveharmonic kudzvinyirira uye reactive simba kudzvinyirira manejimendi.

Pasi peiyo 0.4KV sisitimu yekushandisa modhi, mushure meiyo sefa yekubhadhara midziyo yaiswa mukushanda, iyo pulse ikozvino inodzvinyirirwa, uye mwedzi wepakati simba chinhu chiri kutenderera 0.92.
High-order harmonic resonance, resonance overvoltage, uye overcurrent inokonzerwa nekubatanidza kune sefa muripo webazi redunhu hazvizoitiki.

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" kubva kune yakakwira-order harmonic yazvino muganhu kukosha kwe low-voltage simba uye zvemagetsi midziyo GB/T17625.7-1998
Electrotechnical mazwi Simba 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, chirongwa chekudzoreredza simba muripo weDC brushless mota sefa chakagadzirwa uchifunga nezve simba remagetsi uye pulse ikozvino kudzvinyirira, uye seti yefirita yakaderera-voltage reactive simba muripo inoiswa pazasi 0.4kV. voltage side ye transformer, kudzvinyirira pulse ikozvino, uye kubhadhara reactive mutoro, uye kugadzirisa simba chinhu.Iyo ballast inogadzira 6K-1 pulse ikozvino mukuita kwebrushless DC mota, uye inoshandisa cascaded ikozvino kunyungudutsa yazvino, uye yakanyungudika ikozvino ingangoita 5250Hz uye 7350Hz.Naizvozvo, iyo reactive simba rekubhadhara dhizaini yepakati frequency induction furnace sefa inofanirwa kutora 250Hz, 350Hz uye frequency dhizaini sechinangwa, kuitira kuti ive nechokwadi chekuti bazi remuripo refirita rinogona kudzvanya pulse ikozvino muripo, uye panguva imwe chete. nguva kudzvinyirira reactive mutoro uye kunatsiridza Power Factor.

dhizaini basa
Iyo yakazara simba chinhu cheiyo 12500KVA DC brushless mota yekugadzira mutsara inobhadharwa kubva 0.62 kusvika 0.95.Iyo sefa muripo wemidziyo inofanirwa kuiswa nevhoriyamu ye1100KVar, iyo yakakamurwa kuita 10 mapoka e otomatiki switching muripo kutsiva kumhepo kudivi rezasi voltage re transformer.Iyo 45KVAR zvishoma nezvishoma inogadzirisa vhoriyamu kuti isangane neinobuda simba zvinodiwa mutsetse wekugadzira.Iyo 630KVA transformer DC brushless mota yekugadzira mutsara Iyo yakazara simba chinhu inobhadharwa kubva 0.62 kusvika 0.95.Iyo sefa yekubhadhara mudziyo unofanirwa kuisirwa nevhoriyamu ye600KVar, uye otomatiki kudzima iyo yakaderera-kudivi mhepo yetransformer, uye yayo zvishoma nezvishoma yakagadziridzwa vhoriyamu ye45KVAR, tichifunga nezve voltage zvinodiwa pamutsara wekugadzira.

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Effect analysis mushure mekuiswa kwefirita muripo
Muna Kubvumbi 2010, iyo DC mota yekusefa reactive magetsi muripo mudziyo wakaiswa ukatanga kushanda.Chishandiso chinoteedzera otomatiki shanduko yeDC motors uye frequency converters, inodzvanya yakakwira-odha maharmonics munguva chaiyo, inotsiva reactive simba, uye inovandudza simba chinhu.mashoko sezvinotevera:

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Mushure mesefa yemuripo mudziyo waiswa mukushandiswa, iyo simba factor shanduko curve inenge 0.99 (iyo yakasimudzwa chikamu chingangoita 0.6 kana mudziyo wemuripo wesefa wabviswa)

Rodha kushanda
Ikozvino inoshandiswa ne1250KVA transformer yakaderedzwa kubva ku1960A kusvika ku1210A, inodonha ye38%.Ikozvino inoshandiswa ne1630KVA transformer yakaderedzwa kubva ku1050A kusvika ku657A, inodonha ye37.5%.Mushure mekubhadhara, kukosha kwekuderedza kurasikirwa kwesimba ndeyeWT = △Pd * (S1 / S2) 2 * τ * [1- (cosφ1 / cosφ2) 2] = 32 × {(0.62 × 3000) 3000} 2 × 0.4≈15.8( kw· h) Mune fomula, Pd ndiko kurasikirwa-pfupi-kurasikirwa kweshanduko, inova 32KW, uye kuchengetedza kwegore kwemari yemagetsi i15.8 * 10 * 30 * 10 * 0.7 = 33,000 yuan (zvichienderana nekushanda maawa makumi maviri a zuva, mazuva gumi pamwedzi, uye mwedzi gumi pagore, pakwh magetsi 0.7 yuan).

simba factor situation

Kodzero yekambani yakawedzera kubva pa 0.7 kusvika 0.95, kodzero yemwedzi yakaramba iri pa 0.96-0.98, uye muhoro wepamwedzi i3,000-4,000 yuan.
DC mota sefa yakaderera-voltage reactive simba muripo inokwanisa kudzvanya pulse ikozvino uye kudzoreredza reactive simba mutoro, kugadzirisa dambudziko re reactive simba chirango, kuwedzera kubuda kwesimba rekushandura, kuderedza kurasikirwa kwesimba rinoshanda muripo, kuwedzera kuburitsa, uye kupa Kambani yakagadzira zvakakosha zvehupfumi, uye mutengi akawana mari yeprojekti isingasviki gore.Naizvozvo, kambani inogutsikana zvakanyanya neiyo reactive simba muripo we brushless DC mota uye inverter mafirita, uye ichaunza vamwe vatengi mune ramangwana.


Nguva yekutumira: Kubvumbi-14-2023