Sebōpi sa maqhubu a mahareng se tla hlahisa palo e kholo ea li-harmonics nakong ea ts'ebeliso.Li-harmonics li ke ke tsa baka feela li-resonance tsa lehae tse tšoanang le letoto la matla, empa hape le holisa litaba tsa li-harmonics le ho chesa thepa ea matšeliso ea capacitor le lisebelisoa tse ling.Ntle le moo, pulse current e tla baka liphoso ho lisebelisoa tsa ts'ireletso ea li-relay le lisebelisoa tsa othomathiki, tse ka lebisang pherekanong ea tekanyo le netefatso ea matla a motlakase.
Tšilafalo ea matla a marang-rang a matla e tebile haholo.Bakeng sa kantle ho sistimi ea matla, li-harmonics li tla baka tšitiso e kholo ho lisebelisoa tsa puisano le lisebelisoa tsa elektroniki, 'me li-harmonics li kotsi haholo ho lisebelisoa tsa sebōpi sa maqhubu a mahareng.Ka hona, ho ntlafatsa boleng ba matla a sebōpi sa maqhubu a mahareng ho fetohile karolo ea bohlokoa ea karabo.
Sebōpi sa maqhubu a mahareng ke moroalo o tloaelehileng oa boenjiniere ba matla, o tla hlahisa palo e kholo ea li-harmonics tse tsoetseng pele nakong ea ts'ebetso ea ts'ebetso, e tsejoang hape e le li-harmonics tsa maqhubu a mahareng.Boima ba eona ba harmonic hangata ke makhetlo a 5, 7, 11 le 13.Ho ba teng ha palo e kholo ea li-harmonics tse phahameng ho tla beha ts'ireletseho le ts'ebetso e boreleli ea lisebelisoa tsa mats'eliso a boenjiniere ba matla le bokhoni ba tsela e tšoanang ea libese.Transformer ea mekhahlelo e tšeletseng e ka fokotsa li-harmonics tsa bohlano le tsa bosupa tse hlahisoang ke sebōpi sa maqhubu a mahareng, empa haeba ho se na mehato e lumellanang ea khatello e nkiloeng, tsamaiso e tla matlafatsa li-harmonics, e ama ts'ebetso e tsitsitseng ea transformer, esita le ho etsa hore transformer e chese haholo. le tshenyo.
Ka hona, ha ho lefella li-harmonics tsa sebōpi sa induction ea maqhubu a mahareng, tlhokomelo e tlameha ho lefshoa ho felisoa ha li-harmonics, e le ho thibela lisebelisoa tsa matšeliso ho matlafatsa li-harmonics tse phahameng.Ha boima ba maqhubu a mahareng bo le boholo, ho bonolo ho baka likotsi tse khoptjoa pheletsong ea motlakase o phahameng oa seteishene le tšitiso e lumellanang ea likhoebo tse haufi le mohala.Ha mojaro o ntse o fetoha, matla a tloaelehileng a sebōpi se akaretsang a ke ke a finyella maemo a k'hamphani ea rona, 'me a tla lefisoa khoeli le khoeli.
Utloisisa likotsi tsa libōpi tse phahameng-frequency tšebeliso ea taolo ea harmonic, mokhoa oa ho netefatsa ts'ebetso e tloaelehileng le bophelo ba tšebeletso ea lisebelisoa, le ho ntlafatsa katleho.
Taba ea pele, tlhaloso e khuts'oane ea ts'ireletso ea tikoloho le ho boloka matla a parallel le letoto la li-circuits tsa phepelo ea motlakase oa maqhubu a mahareng:
1. Ha ho bapisoa le letoto kapa potoloho e tšoanang, hona joale ea potoloho ea mojaro e fokotsehile ho tloha ho makhetlo a 10 ho isa ho makhetlo a 12.E ka boloka 3% ea tšebeliso ea matla a ho sebetsa.
2. Potoloho ea letoto ha e hloke mochine o motlakase oa matla, o ka bolokang 1% ea matla a sebelisoang.
3. Sebōpi se seng le se seng sa ho qhibiliha ha induction se tsamaisoa ka boithaopo ke sehlopha sa li-inverters, 'me ha ho hlokahale hore u kenye mochine oa sebōpi o phahameng oa hona joale bakeng sa ho fetola, ka hona ho boloka 1% ea tšebeliso ea matla.
4. Bakeng sa phepelo ea motlakase ea letoto la li-inverter, ha ho na karolo ea concave ea motlakase molemong oa sebopeho sa matla a sebetsang, ke hore, karolo ea tahlehelo ea matla, kahoo nako ea ho qhibiliha e fokotsehile haholo, tlhahiso e ntlafatsoa, matla a bolokiloe, tshireletso ya tikoloho le ho baballa matla ke 7%.
Ea bobeli, moloko le kotsi ea li-harmonics tsa sebōpi sa maqhubu a mahareng:
1. Parallel intermediate intermediate frequency electric power supply system ke mohloli o moholo ka ho fetisisa oa harmonic tsamaisong ea matla.Ka kakaretso, sebōpi sa motlakase sa 6-pulse intermediate frequency hangata se hlahisa li-harmonics tse 6 le 7, athe inverter ea 12-pulse e hlahisa haholo li-harmonics tsa 5, 11 le 13.Ka tloaelo, li-pulse tse 6 li sebelisoa bakeng sa li-unit tse nyane tsa converter le li-pulse tse 12 li sebelisetsoa li-unit tse kholo tsa converter.Lehlakore le nang le matla a phahameng a li-transformer tse peli tsa sebōpi le nka mehato ea ho sisinyeha joalo ka khokahanyo e atolositsoeng ea delta kapa zigzag, 'me e sebelisa khokahanyo ea mahlakore a mabeli a mahlakoreng a mabeli ho theha motlakase oa 24-pulse intermediate frequency ho fokotsa tšusumetso ea harmonics ho. marang-rang a matla.
2. Sebōpi sa induction sa maqhubu a mahareng se tla hlahisa li-harmonics tse ngata nakong ea tšebeliso, e leng se tla baka tšilafalo e tebileng haholo ea harmonic ho marang-rang a matla.Li-Harmonics li fokotsa phetisetso le ts'ebeliso ea matla a motlakase, li etsa hore lisebelisoa tsa motlakase li chese haholo, li baka ho thothomela le lerata, li fokotsa sekhahla sa ho kenya letsoho, li khutsufatsa bophelo ba ts'ebeletso, esita le ho baka ho hloleha kapa ho chesa.Harmonics e tla etsa hore letoto la li-resonance tsa lehae kapa resonance e ts'oanang tsamaisong ea phepelo ea motlakase e eketse litaba tsa harmonic mme e etse hore lisebelisoa tsa matšeliso a capacitor le lisebelisoa tse ling li che.
Ha matšeliso a matla a sebetsang a ke ke a sebelisoa, kotlo ea matla a sebetsang e tla etsahala, e leng se etsang hore ho be le keketseho ea likoloto tsa motlakase.Pulse current le eona e ka baka liphoso ho lisebelisoa tsa ts'ireletso ea relay le lisebelisoa tsa othomathike, tse ka bakang pherekano methating le netefatsong ea matla a motlakase.Bakeng sa kantle ho sistimi ea phepelo ea motlakase, pulse current e tla ba le tšusumetso e kholo ho lisebelisoa tsa puisano le lihlahisoa tsa elektroniki, ka hona, ho ntlafatsa boleng ba matla a sebōpi sa maqhubu a mahareng e se e le ntho e tlang pele.
Nako ea poso: Apr-12-2023