Ruzivo rwekutanga rwevashandisi
Iyo yakakosha mudzimba yekugadziriswa kwetsvina yekambani yekuchenesa mvura yetsvina, iyo inoshandura magetsi emagetsi chikamu cheiyo tsvina yekuchenesa tambo inoshandisa DC inosiyana frequency drive motors, ine 1000KVA2, 630KVA transformers.Iyo dhizaini yemagetsi system dhizaini ndeiyi inotevera:
Data chaiyo yekushandisa
Simba rekubuda kwe1000KVA transformer soft starter i860KVA, avhareji yesimba chinhu PF=0.83, kushanda ikozvino 1250A, kushanda ikozvino 630KVA, simba chinhu PF=0.87, uye kushanda ikozvino 770A.Saka iyo yakazara simba chinhu chinogona chete kuva 0.84.
Simba System Situation Analysis
Mutoro mukuru weiyo inoshandura ballast ndeye 6 single-pulse ballasts.Iyo ballast midziyo inogadzira huwandu hukuru hwepulse ikozvino mubasa rekushandura AC kuita DC.Iyo yakajairika pulse ikozvino sosi uye inoiswa mune yemagetsi grid.Harmonic currents inokonzeresa pulsed yazvino yekushanda voltage kune iyo hunhu impedance yegidhi remagetsi, zvichikonzera kurasikirwa kwemagetsi ekushanda uye zvazvino, zvichiisa mungozi kunaka uye kuchengetedzwa kwekushanda kwekuchinja magetsi, kuwedzera kurasikirwa kwemutsara uye kutsauka kwekushanda kwemagetsi, uye kukonzera kukanganisa iyo grid yemagetsi uye zvidyarwa zvemagetsi ivo pachavo Kufurira.
Iyo program controller komputa interface (PLC) inonzwa kune harmonic kukanganisa kweiyo inoshanda voltage yekuchinja magetsi.Zvinowanzo taurwa kuti iyo yakazara pulse ikozvino inoshanda voltage furemu kurasikirwa (THD) isingasviki 5%, uye yega pulse ikozvino inoshanda voltage kugadzirwa kana kushanda, zvichiita kuti pave netsaona huru yemhosva yekugadzira.Naizvozvo, low-voltage reactive power compensation filter ine pulse current suppression function inofanirwa kushandiswa kudzvanya pulse current yesystem, kubhadhara reactive load, nekuvandudza simba rekuita.
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, seti yeanodzokorodza simba rekubhadhara hurongwa hweiyo inverter simba sefa iyo inonyatso funga iyo simba rekutakura chinhu uye pulse ikozvino kudzvinyirira yakagadzirwa, uye seti yefirita yakaderera voltage inoiswa pa 0.4kV yepasi voltage. divi rekambani transformer Reactive simba muripo kudzvanya pulse ikozvino, kubhadhara reactive mutoro, uye kunatsiridza simba chinhu.
Iyo ballast inogadzira 6K-1 kurongeka pulse ikozvino panguva yekushanda kwekushandura, uye inoshandisa shizha kodhi kutevedzana kutenderedza 5250Hz uye 7350Hz kuita shanduko yekunyungudika.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 1000KVA transformer yekugadzira mutsara inobhadharwa kubva pa0.8 kusvika panosvika 0.95.Iyo sefa muripo wemidziyo inoda kuisirwa nehuwandu hwe380KVar, iyo yakakamurwa kuita mapoka mana, rimwe nerimwe rinovharika otomatiki uye rakabviswa, rinotsiva kupokana kwemhepo yepasi voltage padivi retransformer, uye ine nhanho yekugadzirisa vhoriyamu. ye45KVAR, iyo inogona kubatanidzwa mune inobuda simba zvinodiwa mutsetse wekugadzira.Iyo yakazara simba chinhu inobhadharwa kubva pa0.8 kusvika 0.95.Iyo sefa yekubhadhara midziyo inoda kuiswa nehuwandu hwe310KVar, uye mapoka mana anobviswa otomatiki kuti atsigire yakaderera-side mhepo yetransformer, uye vhoriyamu inogadziridzwa kusvika 26KVAR kuti isangane nekushanda kwemagetsi zvinodiwa pamutsara wekugadzira.
Effect analysis mushure mekuiswa kwefirita muripo
Muna Nyamavhuvhu 2010, iyo inverter yekusefa reactive simba rekubhadhara mudziyo yakaiswa uye yakaiswa mukushanda.Chishandiso chinoteedzera otomatiki shanduko yekuchinja kweiyo inverter, inodzvanya yakakwira-odha maharmonics munguva chaiyo, inotsiva reactive simba, uye inovandudza simba chinhu.mashoko sezvinotevera:
Mushure mesefa yekubhadhara mudziyo waiswa mukushandiswa, iyo simba factor inoshandura curve mushure mekunge sefa yekubhadhara mudziyo waiswa mukushandiswa ingangoita 0.97 (iyo yakasimudzwa chikamu chingangoita 0.8 kana mudziyo wemuripo wesefa wabviswa)
Rodha kushanda
Ikozvino inoshandiswa ne1000KVA transformer yakaderedzwa kubva ku1250A kusvika ku1060A, kudonha kwe15%;ikozvino inoshandiswa ne 630KVA transformer yakaderedzwa kubva ku770A kusvika ku620A, inodonha ye19%.Mushure mekubhadhara, kukosha kwekuderedza kurasikirwa kwesimba ndeyeWT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=24×{(0.85×2000)/2000}2×0.4≈16 (kw h) Muchidimbu, Pd ndiko kurasikirwa-pfupi-kurasikirwa kweshanduko, iyo 24KW, uye kuchengetedzwa kwegore negore kwemari yemagetsi ndeye 16 * 20 * 30 * 10 * 0.7 = 67,000 yuan (zvichienderana nekushanda maawa makumi maviri a zuva, mazuva makumi matatu pamwedzi, mwedzi gumi pagore, 0,7 yuan pakWh).
Rodha kushanda
Ikozvino inoshandiswa ne1000KVA transformer yakaderedzwa kubva ku1250A kusvika ku1060A, kudonha kwe15%;ikozvino inoshandiswa ne 630KVA transformer yakaderedzwa kubva ku770A kusvika ku620A, inodonha ye19%.Mushure mekubhadhara, kukosha kwekuderedza kurasikirwa kwesimba ndeyeWT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=24×{(0.85×2000)/2000}2×0.4≈16 (kw h) Muchidimbu, Pd ndiko kurasikirwa-pfupi-kurasikirwa kweshanduko, iyo 24KW, uye kuchengetedzwa kwegore negore kwemari yemagetsi ndeye 16 * 20 * 30 * 10 * 0.7 = 67,000 yuan (zvichienderana nekushanda maawa makumi maviri a zuva, mazuva makumi matatu pamwedzi, mwedzi gumi pagore, 0,7 yuan pakWh).
Nguva yekutumira: Kubvumbi-14-2023