Ulwazi olusisiseko lwabasebenzisi
Inkampani yeemveliso zeplastiki ivelisa ikakhulu PE imibhobho yonikezelo lwamanzi, intsimbi imibhobho yokuhambisa amanzi, njl. icala phantsi uxinzelelo Ixhotyiswe ngebhokisi yembuyekezo capacitance.Umzobo wenkqubo yonikezelo lwamandla ngolu hlobo lulandelayo:
Eyona datha yokusebenza
Imoto ye-DC ye-400KVA ye-transformer, amandla aphezulu e-inverter yi-360KW, i-avareji yamandla e-PF=0.7, ukusebenza ngoku yi-780A, ibhokisi yembuyekezo engasebenziyo phantsi kwe-transformer nganye ihlala ihamba, i-capacitor iyanda kwaye ivuza, kwaye umlawuli akakwazi ukulawula ukungaqhelekanga, njl njl. I-Phenomena, izinga elibanzi li-0.8 kuphela, kwaye isohlwayo esingavumelekanga malunga ne-15,000 ngenyanga.Ukongezelela, ii-motor kunye ne-soft starters kumgca wemveliso ngamanye amaxesha zonakaliswa, ezichaphazela imveliso.
Uhlalutyo lwemeko yeNkqubo yaMandla
Owona mthwalo ungundoqo we-DC brushless motor kunye ne-inverter rectifier yamandla yi-6-pulse single-rectifier power supply.Ngexesha lokusebenza kwezixhobo zokulungisa, i-AC inokuguqulwa ibe yi-DC, yenze inani elikhulu lemithombo yangoku ye-pulse, ingenise i-harmonic currents kwigridi yamandla, kwaye ichaphazela igridi yamandla.I-impedance yeempawu ibangela amandla ombane osebenzayo we-pulse yangoku, okukhokelela ekuphumeni kwesakhelo sombane osebenzayo kunye nowangoku, kubeka emngciphekweni umgangatho kunye nokhuseleko lokusebenza kombane otshintshayo, ukwandisa ilahleko yomgca kunye nokutenxa kwamandla ombane osebenzayo, kunye nokuba impembelelo embi kwigridi yamandla kunye nezixhobo zombane zombane ngokwawo.
Ujongano lwekhompyuter yolawulo lwenkqubo (PLC) lunovelwano ngokugqwethwa kwe-harmonic yombane osebenzayo wokutshintshela unikezelo lwamandla.Ngokuqhelekileyo kuchazwe ukuba i-pulse yangoku esebenzayo yelahleko yesakhelo sombane (THD) ingaphantsi kwe-5%, kunye ne-pulse yangoku yamandla ombane osebenzayo. imveliso okanye ukusebenza, okukhokelela kwingozi enkulu yetyala lemveliso.
Xa ibhanki yembuyekezo yembuyekezo yamandla esebenzayo ifakwa ekusebenzeni, ngenxa yokuba i-pulse yangoku ye-impedance yebhanki ye-capacitor incinci, isixa esikhulu se-pulse yangoku singeniswa kukwakheka kwe-capacitor, kwaye isixa sangoku sanda ngokukhawuleza, sichaphazela ubomi bayo benkonzo. .Ngakolunye uhlangothi, xa i-pulse yangoku i-capacitor yebhanki ye-capacitor ilingana ne-inductor ye-pulse yangoku ye-software yenkqubo, ukunyuka kwe-harmonic current (i-2-10 amaxesha) kuya kubangela ukuba i-capacitor igqithise kwaye iyitshabalalise, kwaye I-pulse yangoku iya kubangela ukuba ukuphindaphinda kwamandla okuphuma kutshintshe.I-waveform ye-sinusoidal ingaphandle kwesakhelo, ibangele i-saw-tooth-shaped-shaped-shaped-shaped wave, kwaye iya kubangela ukukhutshwa kwenxalenye ye-insulating layer material, ngaloo ndlela ikhawulezisa i-embrittlement ye-insulating layer material, kwaye ibangele umonakalo kwi-capacitor.Ke ngoko, ikhabhinethi yembuyekezo yamandla asebenzayo ayinakusetyenziswa kwi-DC brushless motor kunye nembuyekezo yamandla e-inverter, kwaye isihluzi esinoxinzelelo lwe-pulse yangoku kufuneka sikhethelwe imbuyekezo yamandla asezantsi-voltage.
Hlunga isicwangciso sonyango lwembuyekezo yamandla asebenzayo
Iinjongo zolawulo
Uyilo lwezixhobo zembuyekezo zokucoca luhlangabezana neemfuno zokucinezelwa kwe-harmonic kunye nolawulo loxinzelelo lwamandla asebenzayo.
Ngaphantsi kwenkqubo yokusebenza ye-0.4KV, emva kokuba isixhobo sembuyekezo yokucoca sifakwe ekusebenzeni, i-pulse current icinezelwe, kwaye i-avareji yamandla yenyanga ijikeleze i-0.92.
I-High-order harmonic resonance, i-resonance overvoltage, kunye ne-overcurrent ebangelwa ukudibanisa kwi-filter imbuyekezo yesiphaluka yesebe ayiyi kwenzeka.
Uyilo lulandela iMigangatho
Umgangatho wamandla I-harmonics yegridi kawonkewonke GB/T14519-1993
Umgangatho wamandla Ukuguquguquka kweVoltage kunye ne-flicker GB12326-2000
Iimeko zobugcisa ngokubanzi zesixhobo sembuyekezo yamandla asezantsi-voltage asebenzayo GB/T 15576-1995
Isixhobo sembuyekezo yamandla asezantsi-voltage esebenzayo JB/T 7115-1993
Imbuyekezo yamandla asebenzayo iimeko zobuchwepheshe JB/T9663-1999 "I-low-voltage reactive power isilawuli sembuyekezo ezenzekelayo" ukusuka kwi-high-order harmonic yangoku umda wexabiso lombane ophantsi kunye nezixhobo zombane GB/T17625.7-1998
Amagama e-Electrotechnical Ii-capacitors zamandla GB/T 2900.16-1996
I-low voltage shunt capacitor GB/T 3983.1-1989
Reactor GB10229-88
I-Reactor IEC 289-88
I-low-voltage esebenzayo yembuyekezo yolawulo lolawulo lweemeko zobugcisa DL/T597-1996
Umgangatho ophantsi we-voltage yokukhusela indawo yombane ye-GB5013.1-1997
I-low-voltage epheleleyo yokutshintshela kunye nezixhobo zokulawula i-GB7251.1-1997
Iingcamango zoyilo
Ngokwemeko ethile yenkampani, inkampani yethu iyile iseti yemoto yeDC eneenkcukacha kunye nesikimu esithambileyo sombuyiselo samandla okubuyisela amandla.Qwalasela ngokupheleleyo amandla omthwalo kunye noxinzelelo lwe-harmonic, kwaye ufake izihluzi kwicala le-voltage esezantsi ye-0.4KV ye-transformer yenkampani yembuyekezo yamandla asezantsi-voltage asebenzayo ukucinezela i-harmonics, ukubuyisela amandla asebenzayo, kunye nokuphucula into yamandla.Ngethuba lokusebenza kwe-motor ye-DC kunye ne-inverter, isixhobo sokuhlaziya senza i-6K + 1 i-harmonics ephezulu.Emva kokuba okwangoku kuchithwa kwaye kuguqulwe ngochungechunge lwe-Fourier, amaxesha e-5 ye-250HZ kunye namaxesha e-7 e-harmonics ephezulu ngaphezu kwe-350HZ ayenziwa.Ke ngoko, kuyilo lwembuyekezo yamandla ombane aphakathi amaza ombane asebenzayo, kuyafuneka ukuyila iifrikhwensi ezingama-250HZ, 350HZ nangaphezulu ukuze kuqinisekiswe ukuba isebe lembuyekezo yokucoca inokucinezela ngempumelelo i-harmonics ngelixa ubuyekeza amandla asebenzayo kunye nokuphucula amandla.
umsebenzi woyilo
Amandla abanzi e-DC motor kunye ne-frequency converter line production ehambelana ne-400KVA transformer ibuyekezwa ukusuka kwi-0.7 ukuya ngaphezu kwe-0.95.I-filter compensator kufuneka ibekwe kumthamo we-380kvar, eyahlulahlulwe ngamaqela angama-4 omthamo kwaye inqunyulwe ngokuzenzekelayo ukuhlawula ukugoba kwecala eliphantsi le-voltage ye-transformer ngokulandelanayo.Umthamo wokulungelelaniswa ohleliweyo ngu-45kvar, onokuthi Ulungelelanise iimfuno ezahlukeneyo zamandla omgca wokuvelisa, ngoko ke uyilo luqinisekisa ngokupheleleyo ukuba amandla alungisiweyo angaphezulu kwe-0.9.
Uhlalutyo lwesiphumo emva kokufakwa kwembuyekezo yesihluzi
NgoJulayi ka-2010, isixhobo sembuyekezo yamandla esihluzo esisebenzayo seenjini zeDC kunye neziguquli zamaza zafakwa kwaye zasetyenziswa.Isixhobo silandelela ngokuzenzekelayo utshintsho lweemoto ze-DC kunye neziguquli zefrikhwensi, sicinezela ii-harmonics zomyalelo ophezulu ngexesha lokwenyani, sihlawulela amandla asebenzayo, kwaye siphucula amandla ombane.iinkcukacha ngolu hlobo lulandelayo:
Emva kokuba isixhobo sembuyekezo yesihluzi sisetyenzisiwe, amandla okutshintsha ijika emva kokuba isixhobo sembuyekezo sokucoca sisetyenziswe simalunga ne-0.99 (indawo ephakanyisiweyo imalunga ne-0.7 xa isixhobo sembuyekezo sokucoca sisusiwe)
Umsebenzi wokulayisha
Okwangoku esetyenziswa yi-400KVA i-transformer iyancipha ukusuka kwi-770A ukuya kwi-520A, i-drop ye-33%.Emva kwembuyekezo, ixabiso lokunciphisa ilahleko yamandla yi-WT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=5×{(0.7×400)400}2×0.4≈2.8( kw· h) Kwifomula, i-Pd yilahleko ye-short-circuit ye-transformer, eyi-5KW, kwaye ukugcinwa kweendleko zombane ngonyaka yi-2.8*20*30*10*0.7=11,700 yuan (esekelwe ekusebenzeni iiyure ezingama-20 a usuku, iintsuku ezingama-30 ngenyanga, iinyanga ezili-10 ngonyaka, umbane we-kwh nge-0.7 yuan).
imeko amandla factor
Icala lamalungelo enkampani lilonke linyuke ukusuka kwi-0.7 ukuya kwi-0.95, into yamalungelo enyanga yahlala kwi-0.96-0.98, kwaye isohlwayo sinyuke ukusuka kwi-yuan eyi-15,000 ngenyanga ukuya kwi-yuan eyi-3,000-5,000 ngenyanga.
I-BLDC motor kunye ne-soft starter filter
Isixhobo sembuyekezo yamandla esebenzayo sinakho ukucinezela i-pulse yangoku kwaye ubuyekeze umthwalo wamandla asebenzayo, ukusombulula ingxaki yesohlwayo samandla asebenzayo, ukwandisa umthamo wemveliso ye-transformer, ukunciphisa ukusetyenziswa kwamandla asebenzayo, kunye nokwandisa imveliso, ukuzisa izibonelelo ezicacileyo zoqoqosho. kwinkampani kunye nokubuyiswa kotyalo-mali lweprojekthi yabathengi kunyaka ophelileyo.Ke ngoko, inkampani yaneliseke kakhulu ngembuyekezo yamandla asebenzayo eenjini ze-DC ezingenasbhrashi kunye nezihluzo zokuguqula, kwaye iya kwazisa abanye abathengi kwixa elizayo.
Ixesha lokuposa: Apr-14-2023