Lintlha tsa motheo tsa basebelisi
Khamphani ea lihlahisoa tsa polasetiki e hlahisa lipeipi tsa phepelo ea metsi haholo-holo PE, lipeipi tsa tšepe tsa bellows drainage, joalo-joalo. Khampani e na le mela e 4 ea tlhahiso, karolo ea matla a ho khanna e sebelisa li-motors tsa DC brushless le li-motor tsa DC tse feto-fetohang, ho na le lihlopha tse 'ne tsa 400KVA, transformer e' ngoe le e 'ngoe. tlase khatello lehlakoreng A hlomelloa le capacitance puseletso lebokose le reng.Setšoantšo sa sistimi ea phepelo ea motlakase ke se latelang:
Lintlha tse sebetsang hantle
Enjene ea DC ea 400KVA transformer, matla a phahameng a inverter ke 360KW, karolelano ea matla ke PF = 0.7, hajoale e sebetsang ke 780A, lebokose le sa sebetseng la puseletso tlas'a transformer e 'ngoe le e' ngoe le atisa ho tsamaea, capacitor ea hola le ho lutla, 'me molaoli a ke ke a laola ho se tloaelehe, joalo-joalo Phenomena, tekanyo e akaretsang ke 0.8 feela, 'me tefiso e sa nepahaleng e ka bang 15,000 ka khoeli.Ho phaella moo, li-motor le li-starters tse bonolo moleng oa tlhahiso ka linako tse ling li senyeha, tse amang tlhahiso.
Tlhahlobo ea Boemo ba Boemo ba Matla
Mojaro o ka sehloohong oa motlakase oa DC brushless le inverter rectifier motlakase ke 6 single-pulse rectifier power.Nakong ea ts'ebetso ea lisebelisoa tsa ho lokisa, AC e ka fetoloa DC, ea etsa palo e kholo ea mehloli ea hona joale ea pulse, e hlahisa maqhubu a harmonic ka har'a marang-rang a matla, 'me e ama marang-rang a matla.Sebopeho sa impedance se baka matla a ho sebetsa a pulse current, se fellang ka hore motlakase o tsoe ka ntle ho foreimi ea motlakase o sebetsang le oa hona joale, o behe boleng le ts'ireletseho ea ts'ebetso ea phepelo ea motlakase, ho eketsa tahlehelo ea mohala le ho kheloha ha motlakase o sebetsang. tšusumetso e mpe holim'a marang-rang a matla le lisebelisoa tsa motlakase tsa motlakase ka boeona.
Sesebelisoa sa komporo ea taolo ea lenaneo (PLC) se na le maikutlo a ho sotha ha harmonic ea matla a sebetsang a phepelo ea motlakase.Ka kakaretso ho boletsoe hore tahlehelo ea motlakase oa motlakase oa hona joale (THD) e ka tlase ho 5%, 'me motlakase oa motlakase oa motho ka mong o sebetsa haeba sekhahla sa foreimi se le holimo haholo, phoso ea ts'ebetso ea tsamaiso e ka lebisa ho sitisoeng. tlhahiso kapa tshebetso, e bakang kotsi e kgolo ya molato wa tlhahiso.
Ha banka ea capacitor ea matla a sebetsang e kenngoa ts'ebetsong, hobane ts'ebetso ea hona joale ea pulse ea banka ea capacitor e nyane, palo e kholo ea pulse ea hona joale e kenngoa ka har'a sebopeho sa capacitor, 'me palo ea hona joale e eketseha ka potlako, e ama bophelo ba eona ba tšebeletso haholo. .Ka lehlakoreng le leng, ha pulse ea hona joale capacitor ea capacitor bank e lekana le e lekanang le pulse inductor ea hona joale ea software ea tsamaiso, ho eketseha ha harmonic hona joale (linako tse 2-10) ho tla etsa hore capacitor e chese le ho e senya, 'me pulse current e tla etsa hore maqhubu a matla a phallo a fetohe.Sinusoidal waveform e tsoile ka foreiming, e bakang leqhubu le bohale le bopehileng joaloka sakha, 'me e tla etsa hore ho lokolloe karoloana ea thepa e sireletsang, ka hona e potlakisa ho koaheloa ha lesela la insulating, le ho baka tšenyo ho capacitor.Ka hona, capacitor reactive power compensation cabinet e ke ke ea sebelisoa bakeng sa matšeliso a motlakase oa DC brushless motor le inverter, 'me sefa se nang le ts'ebetso ea khatello ea hona joale ea pulse se lokela ho khethoa bakeng sa matšeliso a tlaase a motlakase.
Sefa moralo oa kalafo oa mats'eliso a matla a sebetsang
Lipheo tsa puso
Moralo oa lisebelisoa tsa matšeliso a filthara o kopana le litlhoko tsa khatello ea harmonic le taolo e sebetsang ea khatello ea matla.
Tlas'a mokhoa oa ho sebetsa oa tsamaiso ea 0.4KV, ka mor'a hore lisebelisoa tsa matšeliso a filthara li kenngoe tšebetsong, pulse current e hatelloa, 'me tekanyo ea khoeli le khoeli ea matla e ka ba 0.92.
Boemo bo phahameng ba harmonic resonance, resonance overvoltage, le overcurrent e bakoang ke ho hokahanya le potoloho ea lekala ea matšeliso ea filthara e ke ke ea etsahala.
Moqapi o Latela Melao
Boleng ba matla Li-harmonics tsa grid ea sechaba GB/T14519-1993
Boleng ba matla Voltage fluctuation le flicker GB12326-2000
Maemo a akaretsang a tekheniki a sesebelisoa sa puseletso ea matla a tlase-voltage reactive GB/T 15576-1995
Sesebelisoa sa mats'eliso a matla a tlase-voltage a sebetsang JB/T 7115-1993
Maemo a tekheniki a puseletso ea matla a sebetsang JB/T9663-1999 "Low-voltage reactive power automatic compensation controller" ho tsoa ho boleng bo phahameng ba moeli oa hona joale oa harmonic oa matla a tlase le lisebelisoa tsa elektroniki GB/T17625.7-1998
Mantsoe a theknoloji ea motlakase Li-capacitor tsa matla GB/T 2900.16-1996
Low voltage shunt capacitor GB/T 3983.1-1989
Reactor GB10229-88
Mohloli oa IEC 289-88
Taolo ea mats'eliso a matla a tlase a sebetsang ka matla a tlase a laela maemo a tekheniki DL/T597-1996
Kereiti ea tšireletso ea motlakase ea matla a tlase a GB5013.1-1997
Li-switchgear tse tlase-tlase le lisebelisoa tsa taolo GB7251.1-1997
Mehopolo ea moralo
Ho ea ka maemo a ikhethileng a k'hamphani, k'hamphani ea rona e thehile sete ea lisebelisoa tse qaqileng tsa enjene ea DC le sekema sa mats'eliso a mats'eliso a motlakase a qalang a bonolo.Ak'u nahane ka botlalo mabapi le matla a matla le khatello ea harmonic, 'me u kenye li-filters ka lehlakoreng la motlakase oa 0.4KV oa transformer ea k'hamphani bakeng sa matšeliso a matla a tlaase a motlakase ho hatella li-harmonics, ho lefella matla a sebetsang, le ho ntlafatsa matla a matla.Nakong ea ts'ebetso ea enjene ea DC le inverter, sesebelisoa sa rectifier se hlahisa li-harmonics tse phahameng tsa 6K + 1.Ka mor'a hore hona joale e senyehe 'me e fetoloe ke letoto la Fourier, linako tse 5 tsa 250HZ le linako tse 7 tsa li-harmonics tse phahameng ka holimo ho 350HZ li hlahisoa.Ka hona, moralong oa puseletso ea matla a motlakase a mahareng a maqhubu a motlakase, hoa hlokahala ho rala maqhubu a 250HZ, 350HZ le ka holimo ho netefatsa hore lekala la puseletso ea filthara le khona ho hatella li-harmonics ha le ntse le lefella matla a sebetsang le ho ntlafatsa matla a matla.
kabelo ea moralo
Matla a pharalletseng a mohala oa tlhahiso ea motlakase oa DC le frequency converter e tsamaellanang le 400KVA transformer e lefshoa ho tloha ho 0.7 ho ea ho feta 0.95.Filter compensator e hloka ho beoa ka matla a 380kvar, e arotsoeng ka lihlopha tse 4 tsa bokhoni mme e khaoloe ka bo eona ho lefella ho kobeha ha lehlakore la motlakase o tlase oa transformer ka ho latellana.Bokhoni ba ho fetola bo hlophisitsoeng ke 45kvar, bo ka ikamahanyang le litlhoko tse fapaneng tsa matla tsa mohala oa tlhahiso, kahoo moralo o tiisa ka botlalo hore matla a fetotsoeng a ka holimo ho 0.9.
Tlhahlobo ea phello ka mor'a ho kenya matšeliso a filthara
Ka Phupu 2010, sesebelisoa sa mats'eliso a matla a filthara bakeng sa li-motor tsa DC le li-frequency converters se ile sa kenngoa 'me sa kenngoa ts'ebetsong.Sesebelisoa se latela ka bohona liphetoho tsa mojaro oa li-motor tsa DC le li-converter tsa frequency, se hatella li-harmonics tse phahameng ka nako ea nnete, se lefella matla a sebetsang, 'me se ntlafatsa matla a matla.lintlha tse latelang:
Ka mor'a hore sesebelisoa sa matšeliso a sefa se sebelisoe, motlakase oa phetoho ea motlakase ka mor'a hore sesebelisoa sa puseletso se sebelisoe e ka ba 0.99 (karolo e phahamisitsoeng e ka ba 0.7 ha sesebelisoa sa matšeliso se tlosoa)
Ts'ebetso ea mojaro
Hona joale e sebelisoang ke 400KVA transformer e fokotsehile ho tloha ho 770A ho ea ho 520A, ho theoha ha 33%.Ka mor'a matšeliso, boleng ba ho fokotsa tahlehelo ea matla ke WT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=5×{(0.7×400)400}2×0.4≈2.8( kw· h) Ka foromo, Pd ke tahlehelo ea potoloho e khutšoane ea transformer, e leng 5KW, mme poloko ea selemo le selemo ea litšenyehelo tsa motlakase ke 2.8*20*30*10*0.7=11,700 yuan (e ipapisitseng le ho sebetsa lihora tse 20 a letsatsi, matsatsi a 30 ka khoeli, likhoeli tse 10 ka selemo, ka kwh motlakase 0,7 yuan).
boemo ba boemo ba matla
Kakaretso ea litokelo tsa k'hamphani e eketsehile ho tloha ho 0.7 ho isa ho 0.95, ntlha ea khoeli le khoeli ea litokelo e ntse e le 0.96-0.98, 'me kotlo e eketsehile ho tloha ho 15,000 yuan ka khoeli ho ea ho 3,000-5,000 yuan ka khoeli.
Mochine oa motlakase oa BLDC le mochini o qalang o bonolo
Sesebelisoa sa matšeliso a matla a sebetsang se na le bokhoni ba ho hatella hona joale le ho lefella matla a matla a sebetsang, ho rarolla bothata ba kotlo ea matla a sebetsang, ho eketsa molumo oa motlakase oa motlakase, ho fokotsa tšebeliso ea matla a sebetsang, le ho eketsa tlhahiso, ho tlisa melemo e hlakileng ea moruo. ho khamphani le ho khutlisa matsete a morero oa bareki selemong se fetileng.Ka hona, k'hamphani e khotsofetse haholo ka matšeliso a sebetsang a motlakase a brushless DC motors le inverter filters, 'me e tla tsebisa bareki ba bang nakong e tlang.
Nako ea poso: Apr-14-2023