Ruzivo rwekutanga rwevashandisi
Kambani inotenderedza simbi inonyanya kugadzira inopisa-yakatenderedzwa simbi ine yakatarwa ye16mm~φ150mm.Iyo yemagetsi chikamu chekambani yekugadzira mutsara inofambiswa neDC mota uye ine maviri 3150KVA transformers.Iyo dhizaini yemagetsi system dhizaini ndeiyi inotevera:
Data chaiyo yekushandisa
Avhareji yemagetsi eiyo 3150KVA DC brushless mota iPF=0.75, iyo inoshanda ikozvino 2650A, iyo huru pulse ikozvino i5 times, 7 times, uye ikozvino shanduko reshiyo i19.5%.
Simba System 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.
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" High-order harmonic current limit value kubva pasi-voltage power uye zvemagetsi 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 sefa reactive simba muripo unofanirwa kugadzirirwa 250Hz, 350Hz uye mamwe mafrequencies kuti ive nechokwadi chekuti sefa yemuripo wedunhu inogona kunyatso kusefa iyo pulse ikozvino inobuda simba, kuvandudza iyo simba chinhu, uye kuita iyo system pulse ikozvino inoenderana neGB/T3. .
dhizaini basa
Iyo yakazara simba chinhu cheiyo 3150KVA transformer inobhadharwa kubva pa0.72 kusvika panosvika 0.95.Iyo sefa muripo wemidziyo inofanirwa kuiswa ne 2100KVar, uye yakakamurwa kuita 6 mapoka ekudzora switch kuti atsigire pasi kudzvanywa parutivi kupepeta kweshanduko, uye kugadzirisa vhoriyamu kusvika 95KVAR, uchifunga nezvekubuda kwesimba zvinodiwa mutsetse wekugadzira.
Effect analysis mushure mekuiswa kwefirita muripo
Muna Kubvumbi 2011, iyo DC mota sefa reactive simba rekubhadhara mudziyo yakaiswa uye yakaiswa mukushanda.Chishandiso chinoteedzera otomatiki shanduko yeDC mota, uye inonyatso kusefa kunze kwepamusoro-kurongeka harmonics kubhadhara reactive simba uye kugadzirisa simba chinhu.mashoko sezvinotevera:
Harmonic spectrum distribution diagram
Rodha Waveform
Mushure mesefa yekubhadhara mudziyo waiswa mukushandiswa, iyo simba factor shanduko curve inenge 0.98 (iyo yakasimudzwa chikamu chingangoita 0.7 kana mudziyo wemuripo wesefa wabviswa)
Rodha kushanda
Simba reiyo 3150KVA transformer iri pamusoro pe0.95, 5th harmonic yakaderedzwa kubva ku510A kusvika 102A, 7th harmonic inoderedzwa kubva ku300A kusvika ku60A, uye ikozvino inoshandiswa inoderedzwa kubva ku2650A kusvika ku2050A, inodonha ye23%.Mushure mekubhadhara, kukosha kwekuderedza kurasikirwa kwesimba ndeyeWT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=35×{(0.72×3150)/3150}2×0.66≈33 (kw h) Mune fomula, Pd ndiko kurasikirwa-pfupi-yedunhu kurasikirwa kweshanduko, inova 35KW, uye kuchengetedza kwegore kwemari yemagetsi ndeye 33 * 20 * 30 * 10 * 0.7 * 2 = 280,000 yuan (zvichienderana nekushanda makumi maviri maawa pazuva, mazuva makumi matatu pamwedzi, uye mwedzi gumi pagore , 0,7 yuan pakilowatt-awa yemagetsi);nekuda kwekuderedzwa kweharmonics, bhiri remagetsi rakachengetwa: Kurasikirwa kweshanduko kunokonzerwa neharmonic ikozvino kunonyanya kuwedzera kurasikirwa kweferromagnetic uye kurasikirwa kwemhangura.Iyo ferromagnetic kurasikirwa inoenderana nesimba rechitatu reiyo harmonic yazvino frequency.Injiniya Kazhinji, 2% ~ 5% inotorwa.Pakugadzirisa mutoro, 2% inotorwa, kureva, WS = 4300 * 6000 * 0.7 * 0.03≈360,000 yuan, kureva, kuchengetedza kwegore kwemari yemagetsi ndeye 28 + 36 = 64 (10,000 yuan).
simba factor situation
Kodzero dzekambani dzese dzawedzera kubva pa0.72 kusvika panosvika 0.95, kodzero dzepamwedzi dzakaramba dziri pa0.96-0.98, uye mubairo wepamwedzi wabva pa100,000 yuan kusvika 15,000 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 weiyo brushless DC mota sefa, uye ichaunza vamwe vatengi mune ramangwana.
Nguva yekutumira: Kubvumbi-14-2023