Ruzivo rwekutanga rwevashandisi
Kambani yezvigadzirwa zvepurasitiki inonyanya kugadzira mapaipi emvura ePE, simbi inovhuvhuta pombi dzemvura, nezvimwewo pasi pressure side Yakashongedzerwa ne capacitance compensation box.Iyo dhizaini yemagetsi system dhizaini ndeiyi inotevera:
Data chaiyo yekushandisa
Iyo DC mota ye400KVA transformer, simba repamusoro reiyo inverter i360KW, avhareji simba chinhu PF = 0.7, kushanda ikozvino 780A, bhokisi rekubhadhara risiri pasi peshanduro yega yega rinowanzo famba, capacitor inowedzera nekudonha, uye iyo mutongi haakwanisi kudzora kusagadzikana, nezvimwe. Phenomena, chiyero chakakwana chinongova 0.8, uye mutero usina kukodzera unosvika 15,000 pamwedzi.Uye zvakare, iwo mota uye zvinyoro zvinotanga mumutsetse wekugadzira dzimwe nguva zvinokuvadzwa, izvo zvinokanganisa kugadzirwa.
Simba System Situation Analysis
Iyo huru mutoro weDC brushless mota uye inverter rectifier simba rekupa 6 single-pulse rectifier magetsi.Munguva yekushanda kwemidziyo yekugadziridza, AC inogona kushandurwa kuita DC, ichigadzira huwandu hukuru hwemapori ezvino masosi, kuunza harmonic currents mugidhi remagetsi, uye kukanganisa gidhi remagetsi.Iyo hunhu impedance inokonzeresa kushanda kwevoltage ye pulse yazvino, zvichikonzera kunze-kwe-frame yevoltage inoshanda uye yazvino, ichiisa panjodzi kunaka uye kuchengetedzwa kwekushanda kweiyo switching magetsi, kuwedzera kurasikirwa kwemutsara uye kushanda kwemagetsi kutsauka, uye kuve ne kukanganisa kwakashata pamagetsi emagetsi 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.
Kana iyo reactive power compensation capacitor bank yaiswa mukushanda, nekuti iyo pulse yazvino hunhu impedance yebhangi capacitor idiki, huwandu hukuru hwepulse ikozvino hunounzwa mukuumbwa kwecapacitor, uye huwandu hwazvino hunowedzera nekukurumidza, huchikanganisa hupenyu hwayo hwesevhisi. .Kune rumwe rutivi, apo pulse current capacitor ye capacitor bank yakaenzana neakaenzana pulse current inductor ye software software, kuwedzera kweharmonic current (2-10 times) kuchaita kuti capacitor iwedzere kupisa uye kuiparadza, uye iyo pulse current ichaita kuti kuwanda kwesimba rekubuda richinje.Iyo sinusoidal waveform yabuda mufuremu, zvichiita kuti isaha-zino-rakapinza wave wave, uye inokonzeresa kuburitswa kwechidimbu cheiyo insulating layer zvinhu, nekudaro ichimhanyisa kukwidziridzwa kweiyo insulating layer zvinhu, uye kukonzeresa kukuvadza kune capacitor.Naizvozvo, iyo capacitor reactive simba compensation cabinet haigone kushandiswa kuDC brushless mota uye inverter simba muripo, uye sefa ine pulse ikozvino kudzvinyirira basa inofanirwa kusarudzirwa yakaderera-voltage reactive simba muripo.
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, kambani yedu yakagadzira seti yakadzama DC mota uye yakapfava yekutanga inogadzirisa simba rekubhadhara sefa chirongwa.Nyatsofunga nezvesimba remutoro uye kudzvanywa kweharmonic, uye isa mafirita pa 0.4KV yepasi voltage padivi retransformer yekambani kune yakaderera-voltage reactive simba muripo kudzvanyirira maharmonics, kubhadhara reactive simba, uye kugadzirisa simba chinhu.Munguva yekushanda kweDC mota uye inverter, mudziyo wekugadzirisa unogadzira 6K + 1 yepamusoro maharmonics.Mushure mekunge ikozvino yaora uye yakashandurwa neFourier series, 5 nguva dze 250HZ uye 7 nguva dzepamusoro dzeharmonics pamusoro pe350HZ dzinogadzirwa.Naizvozvo, mukugadzirwa kweyepakati frequency electric furnace firita reactive simba muripo, zvinodikanwa kugadzira mafrequency e250HZ, 350HZ uye pamusoro kuti ive nechokwadi chekuti bazi remuripo wesefa rinogona kudzvanya maharmonics uku richiripa reactive simba uye kugadzirisa simba chinhu.
dhizaini basa
Iyo yakazara simba reDC mota uye frequency converter yekugadzira mutsara inoenderana ne400KVA transformer inobhadharwa kubva 0.7 kusvika kupfuura 0.95.Iyo firita compensator inoda kuiswa pachiyero che 380kvar, iyo yakakamurwa kuita 4 mapoka ehukuru uye otomatiki kutemwa kubhadharira kukotama kweyakaderera-voltage divi reshanduko zvichiteerana.Iyo yakarongedzerwa gadziriso inokwana 45kvar, iyo inogona Kuchinjika kune akasiyana-siyana emagetsi zvinodiwa mumutsara wekugadzira, saka dhizaini inovimbisa zvizere kuti simba rakagadziridzwa riri pamusoro pe0.9.
Effect analysis mushure mekuiswa kwefirita muripo
Muna Chikunguru 2010, iyo sefa reactive simba rekubhadhara mudziyo weDC motors uye frequency converters yakaiswa uye yakaiswa mukushanda.Chishandiso chinoteedzera otomatiki shanduko yeDC motors uye frequency converters, inodzvanya yakakwira-odha maharmonics munguva chaiyo, inotsiva reactive simba, uye inovandudza simba chinhu.mashoko sezvinotevera:
Mushure mesefa yemuripo mudziyo waiswa mukushandiswa, iyo simba factor inoshandura curve mushure mekunge sefa yekubhadhara mudziyo waiswa mukushandisa ingangoita 0.99 (iyo yakasimudzwa chikamu chingangoita 0.7 pakabviswa mudziyo wemuripo wesefa)
Rodha kushanda
Ikozvino inoshandiswa ne400KVA transformer yakaderedzwa kubva pa770A kusvika ku520A, inodonha ye33%.Mushure mekubhadhara, kukosha kwekuderedza kurasikirwa kwesimba ndeyeWT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=5×{(0.7×400)400}2×0.4≈2.8( kw· h) Mune fomula, Pd ndiko kurasikirwa-pfupi-kurasikirwa kweshanduko, inova 5KW, uye kuchengetedza kwegore kwemari yemagetsi i2.8*20*30*10*0.7=11,700 yuan (zvichienderana nekushanda maawa makumi maviri a zuva, mazuva makumi matatu pamwedzi, mwedzi gumi pagore, pa kwh magetsi 0.7 yuan).
simba factor situation
Kodzero yekambani yakawedzera kubva pa0.7 kusvika 0.95, kodzero dzepamwedzi dzakaramba dziri pa0.96-0.98, uye chirango chakawedzera kubva pa15,000 yuan pamwedzi kusvika pa3,000-5,000 yuan pamwedzi.
Iyo BLDC mota uye yakapfava yekutanga sefa
Iyo reactive simba muripo wesimba mudziyo inokwanisa kudzvanya pulse ikozvino uye kubhadhara reactive simba rekutakura, kugadzirisa dambudziko reiyo reactive simba chirango, kuwedzera kubuda kwevhoriyamu yetransformer, kuderedza kushandiswa kwesimba rinoshanda, uye kuwedzera kuburitsa, kuunza pachena mabhenefiti ehupfumi. kukambani uye kudzoka kwevatengi purojekiti yekudyara gore rapfuura.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