Ruzivo rwekutanga rwevashandisi
Kambani yechigadzirwa chepurasitiki inonyanya kugadzira jira remukati nekunze rekushambadza bhokisi, jira rekupfapfaidza, uye PVC yakakungurutswa firimu zvigadzirwa.Midziyo yekugadzira yekambani ine mitsara mina yakafara PVC yakakungurutswa yekugadzira firimu, ine mutsara wekupfapfaidza wekugadzira uye maviri mapikicha ekugadzira zvigadzirwa, Chikamu chemagetsi chinotora frequency inoshandura drive mota uye DC mota, 1000KVA seti, 2 seti ye1250KVA transformers, 2. seti ye800KVA matransformer, 1 seti ye630KVA matransformer, uye chiyero chemuripo weplate inogadzikwa padivi rakaderera remagetsi retransformer.Iyo dhizaini yemagetsi system dhizaini ndeiyi inotevera:
Data chaiyo yekushandisa
Iyo 2000KVA transformer ine yepakati frequency furnace uye inverter ine simba rakakura re1500KVA, iyo chaiyo simba chinhu PF = 0.82, iyo inoshanda ikozvino 2250A, iyo harmonics inonyanya 5th uye 7th, uye huwandu hwazvino hwekukanganisa i23.6% .
Simba System Situation Analysis
Mutoro mukuru wepakati frequency induction furnace, yepakati frequency induction furnace uye inverter rectifier simba rekupa ndiyo 6th pulse rectifier.Iyo yekugadziridza midziyo inoburitsa yakawanda pulse ikozvino kana ichishandura AC yazvino kuita AC voltage.Iyo harmonic yazvino inounzwa mugedhi remagetsi inogona kukonzera pulse Ikozvino inoshanda voltage, zvichikonzera kushanduka kwekushanda kwemagetsi uye ikozvino, kuisa mungozi kunaka uye kuchengetedzwa kwekushanda kwekuchinja magetsi, kuwedzera kurasikirwa kwemutsara uye kutsauswa kwemagetsi, uye kukanganisa gidhi remagetsi uye. midziyo yemagetsi yemagetsi pachayo.
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, iyo yakaderera-voltage reactive simba kubhadharwa kwesefa ine basa repulse ikozvino sefa inofanira kushandiswa kubhadhara reactive mutoro uye kugadzirisa simba chinhu.
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 chaiwo ekambani, kambani yakagadzira seti yakadzama reactive simba remuripo zvirongwa zvepakati frequency induction choto uye inverter magetsi.Tichifunga nezvekuremerwa simba chinhu uye pulse ikozvino sefa, A seti yefirita yakaderera-voltage reactive simba muripo, kusefa iyo pulse ikozvino, kubhadhara reactive mutoro, uye kunatsiridza simba chinhu.
Mukuita kwese kweyepakati frequency induction furnace uye inoshandura, zvikamu zvese zvinogadzira 6K pulse currents, izvo zvinoshandurwa zvinoenderana nekuyerera kwazvino kweFourier series, uye hunhu hwekupuruzira mafungu anogadzirwa pa5250Hz uye 7350Hz.Naizvozvo, pakugadzira sefa reactive simba muripo, iyo yakapfava yekutanga uye 350Hz frequency dhizaini dhizaini inovimbisa kuti iyo sefa yekubhadhara magetsi emagetsi emagetsi inonzwisisika uye iyo sefa pulse ikozvino kubuda kwemagetsi muripo inovandudzwa kuvandudza simba remagetsi kuitira kuti system software pulse ikozvino ive. zvinoenderana neGB/T3 pamwe chete.
dhizaini basa
Imwe neimwe seti ye2000KVA transformer inoenderana nepakati frequency furnace uye yakazara simba chinhu cheiyo inverter inobhadharwa kubva pa0.8 kusvika pamusoro pe0.95, iyo 5th harmonic inoderedzwa kubva ku420A kusvika 86A, uye 7th harmonic inoderedzwa kubva 230A kusvika 46A.Iyo sefa yekubhadhara mudziyo inoda kuiswa ine huwandu hwe1060KVar.Yakakamurwa kuita 6 mapoka ehukuru hwekuchinjisa otomatiki, inoenderana nepakati frequency choto, inverter rectifier magetsi ekufambisa sefa muripo, yakakamurwa kuita 5 nguva, 7 nguva uye yakanaka muripo muripo wefirita muripo wemugwagwa otomatiki switching, kusangana nepakati frequency choto, inverter sefa uye reactive simba Muripo wekugadzira zvinodiwa.
Iyi dhizaini inovimbisa zvizere kuti iyo harmonic control inoenderana neyenyika standard GB/T 14549-93, uye inogadzirisa iyo simba chinhu chepakati frequency choto uye frequency converter pamusoro pe0.95.Sezvinoratidzwa pamufananidzo uri pazasi: Ongororo yemhedzisiro mushure mekuiswa kwesefa muripo
Muna Chikumi 2010, iyo yepakati frequency furnace uye frequency converter filter reactive power compensation device yakaiswa uye yakaiswa mukushanda.Chishandiso chinoteedzera otomatiki shanduko yemoto wepakati frequency fureji uye frequency converter, uye chaizvo inobvisa yakakwira-odha 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 inoshandura curve mushure mekunge sefa yekubhadhara mudziyo waiswa mukushandiswa ingangoita 0.97 (iyo yakasimudzwa chikamu chingangoita 0.8 kana mudziyo wemuripo wesefa wabviswa)
Mamiriro ekushanda kwemutoro Ikozvino inoshandiswa neseti yega yega ye2000KVA transformers inoderedzwa kubva ku2250A kusvika ku1860A, kudonha kwe17%;iyo yakaderedzwa kukosha kwekurasikirwa kwesimba mushure mekubhadhara ndeye WT = △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 kuchengetedza kwegore kwemari yemagetsi ndeye 16 * 20 * 30 * 10 * 0.7 = 67,000 (Kubva pakushanda maawa makumi maviri pazuva. , mazuva 30 pamwedzi, uye mwedzi gumi pagore, 0,7 yuan pakilowatt-awa yemagetsi);bhiri remagetsi rakachengetwa nekuda kwekuderedzwa kweharmonics: Kurasikirwa kunokonzerwa neharmonic currents kune transformers kunonyanya kukonzerwa nekuwedzera kurasikirwa kweferromagnetic uye kurasikirwa kweMhangura uye kurasikirwa kweferromagnetic kunoenderana nesimba rechitatu reharmonic current frequency.Kazhinji, 2% ~ 5% inotorwa muinjiniya, uye 2% inotorwa kuti igadzirise mutoro, kureva: WS = 2000 * 6000 * 0.7 * 0.02≈168,000 yuan, ndiko kuti, bhiri remagetsi rinogona kuchengetwa mugore rose. (6.7+16.8)*2=47 (10,000 yuan).
simba factor situation
Kodzero yekambani yese yakawedzera kubva pa0.8 kusvika 0.95, uye kodzero dzepamwedzi dzakachengetwa pa0.96-0.98, paine mubairo wekuwedzera we6,000-10,000 yuan.
Zvese mune zvese, iyo yakaderera-voltage reactive simba muripo weMFF uye VF mafirita ane akanakisa mafirita uye anodzosera mitoro inoshanda, inogadzirisa dambudziko re reactive simba zvirango, inowedzera kubuda kwemagetsi emagetsi, inovandudza kunaka kwesimba, inovandudza hunhu hwemagetsi akaiswa. midziyo, uye inoderedza kushanda kwesimba muripo Kushandiswa, kuvandudza kushanda zvakanaka, zvakakosha zvehupfumi kune kambani, mari nekudzoka kwerisingasviki gore kune vatengi, etc. Naizvozvo, kambani inogutsikana zvikuru nemubhadharo wepakati frequency induction choto. uye iyo sefa reactive mutoro weiyo inverter magetsi, uye ichaunza vatengi vazhinji mune ramangwana.
Nguva yekutumira: Kubvumbi-14-2023