Tsamaiso ea phepelo ea motlakase sepetleleng seo ke ea tsamaiso ea sechaba, e leng yuniti ea tiisetso ea phepelo ea motlakase libakeng tsohle.Moralo oa moaho oa sepetlele hangata o nka mofuta o bohareng, mme mojaro oa motlakase ke oa sehlopha sa mojaro.Mefuta ea eona e ka sehloohong ea motlakase e kenyelletsa: tsamaiso ea mabone, tsamaiso ea moea, tsamaiso ea matla a bongaka, tsamaiso ea mabone a tšohanyetso.
Leseli le tsamaiso ea moea ke matla a ka sehloohong a matla a mefuta e sa tšoaneng ea tšebeliso ea motlakase sepetlele, e tla hlahisa maikutlo a maholo a harmonic ho marang-rang a matla a sepetlele nakong ea tšebeliso.Ka lebaka la ts'ebeliso ea mefuta e mecha ea motlakase e kang mochini oa X-ray, mochini oa matla a khoheli oa MRI, mochini oa CT, joalo-joalo, ts'ebeliso ea phepelo ea motlakase, UPS e sa senyeheng le tse ling tse ngata tse sa tsitsang, le tsona li hlahisa maikutlo a lumellanang ho marang-rang a matla.
Sepetlele se na le tšebeliso e phahameng ea motlakase, 'me thepa ea tsamaiso e bolokehile ebile e ka tšeptjoa e le eona ntho e ka sehloohong.Ka lebaka la tšebeliso e kholo ea mojaro o se nang moeli, li-harmonics tsa sebopeho sa 3rd, 5th le 7th order li hlahisoa haholo-holo marang-rang a matla a sepetlele.Harmonics e ama ka ho toba ts'ebetso e tsitsitseng ea lisebelisoa tsa bongaka tse nepahetseng, 'me ho bokellana ha li-harmonics tsa 3 molaong o sa nke lehlakore ho baka mocheso moeling o bohareng, o behang ts'ebetso e sireletsehileng ea marang-rang a matla a sepetlele.
2. Tlhaloso le moloko oa li-harmonics
Tlhaloso ea li-harmonics: letoto la Fourier le qhibiliha ha nako le nako e sa lekanyetsoang ea sinusoidal quantity, ho phaella tabeng ea ho fumana karolo e tšoanang le maqhubu a motheo a marang-rang a matla, empa hape le letoto la likarolo tse kholo ho feta tse ngata tse ngata tsa maqhubu a motheo a matla. grid, karolo ena ea motlakase e bitsoa harmonics.
Moloko oa li-harmonics: Ha hona joale ho phalla ka mojaro, ho na le kamano e se nang moeli le motlakase oa mojaro, o etsang hore ho be le motlakase o seng oa sinusoidal, o hlahisang li-harmonics.
3. Kotsi ea li-harmonics
1) Harmonics e lebisa ho se sebetseng ha motlakase ho sa nepahalang le likotsi tse sitisang lisebelisoa tse bakiloeng ke tšebeliso e mpe kapa ho hana ts'ireletso le lisebelisoa tsa othomathike, tse bakang tahlehelo e kholo e eketsehileng.
2) Keketseho ea khafetsa ea maqhubu a harmonic e baka phello e hlakileng ea letlalo, e eketsang khanyetso ea likhoele tsa likhoele tsa motlakase le mela ea kabo, e eketsa tahlehelo ea mohala, e eketsa mocheso, e tsofala pele ho nako, e khutsufatsa bophelo, e baka tšenyo, 'me e na le tloaelo ea ho senya nako e khuts'oane, ho etsa kotsi ea mollo.
3) Iketsetse resonance ea marang-rang ea matla, e lebisang ho voltage ea harmonic le overcurrent, e baka likotsi tse mpe, matšeliso a capacitor le lisebelisoa tse ling tsa motlakase.
4) Harmonics e ama ts'ebetso e tloaelehileng ea lisebelisoa tse fapaneng tsa motlakase.E lebisa tahlehelong e eketsehileng le ho futhumala ho feteletseng ha li-asynchronous motors le li-transformer, tse lateloang ke ho sisinyeha ha mochini, lerata le ho fetella, ho fokotsa ts'ebetso le ts'ebeliso, le ho khutsufatsa bophelo ba ts'ebeletso.
5) Ho kena-kenana le puisano e haufi, lisebelisoa tsa elektronike kapa tsa ho laola ka mokhoa o itekanetseng, kapa esita le ho etsa hore e se ke ea sebetsa ka mokhoa o tloaelehileng.
4. Leano la ho sefa
Sepetlele sa Shaanxi Central ke sepetlele sa boemo ba bobeli ba naha se nang le lisebelisoa tsa bongaka tse tsoetseng pele le tikoloho e ntle haholo ea sepetlele.Basebeletsi ba rona ba litsebi le tsa theknoloji ba ne ba behiloe tlhokomelong ea sepetlele qalong ea ho lekanya boleng ba matla a marang-rang a fokolang a matla a sepetlele.Kakaretso ea sekhahla sa ho sotha ha hona joale ho marang-rang a matla a sepetlele ke 10%, haholo-holo e ajoa ka har'a li-harmonics tse khethollang 3rd, 5th le 7th order.Ho ea ka liphetho tsa liteko, k'hamphani ea rona e lokiselitse lisebelisoa tsa 400A tse sebetsang tsa filthara sepetlele, tse kentsoeng ka lehlakoreng la sesebelisoa sa motlakase se tlase, ts'ebeliso ea kalafo e bohareng bakeng sa taolo ea harmonic.
Sesefa se 5 se sebetsang(/690v-active-power-filter-product/)
5.1 Selelekela sa Sehlahisoa
Active Power filter(/noker-3-phase-34-wire-active-power-filter-apf-ahf-for-dynamic-harmonics-compensation-product/) ke mofuta o mocha oa sesebelisoa sa elektroniki se sebelisoang ho hatella ka matla li-harmonics le puseletsa matla a sebetsang, a ka lefellang li-harmonics le liphetoho tsa matla a sebetsang ka boholo le maqhubu.
5.2 Molao-motheo oa ho Sebetsa
Hona joale mojaro o fumanoa ka nako ea sebele ke CT e ka ntle, 'me boleng ba harmonic bo baloa ke DSP e ka hare.Ka pontso ea PWM e romelloa ho IGBT, inverter e hlahisa motlakase oa harmonic o lekanang le mojaro oa harmonic le ka lehlakoreng le leng ho kena marang-rang a matla ho felisa harmonic le ho finyella morero oa ho hloekisa marang-rang a matla.
6 .Ho hlahloba le ho hlahloba lintlha tsa taolo ea harmonics lipetlele
Khabinete ea APF
Lintlha tsa APF(/harmonics-compensation-200400v-active-harmonic-filter-ahf-module-triple-phase-product/)harmonic compensation sepetlele li ne li hlahlojoa ke mohlahlobi oa boleng ba matla CA8336 oa Fora, le lintlha tsa boleng ba matla. li ile tsa lekoa ka ho latellana tlas'a maemo a mabeli a ts'ebetso ea APF (ka mor'a matšeliso) le ho koala (ntle le matšeliso), 'me lintlha li ile tsa akaretsa le ho hlahlojoa.
6.1 Tekanyo le tlhahlobo ea APFs(/3-phase-3-wire-active-power-filter-400v-75a-apf-panel-product/) ho kenya le ho tlosa data
1: Boleng bo sebetsang ba ho sebetsa hona joale
2:THDi pele Filter e sebetsang e hokahane
3:THDi ka mor'a hore Filter e sebetsang e hokahane
4:THDi ho tloha 1st ho ea 5th pele Filter e sebetsang e hokahane
5:THDi ho tloha 1st ho ea 5th ka mor'a hore Filter e sebetsang e hokahane
6:THDi ho tloha 1st ho ea 7th pele Filter e sebetsang e hokahane
7:THDi ho tloha 1st ho isa 7th ka mor'a hore Filter e sebetsang e hokahane
Sephetho:
| APF | THDi (kakaretso) | THDi (5th) | THDi (7th) |
| Pele APF e hokela | 10% | 9% | 3.3% |
| Ka mor'a hore APF e kopane | 3% | 3% | 0.5% |
Joalokaha ho bontšitsoe setšoantšong se ka holimo, taolo ea harmonic ea sepetlele ka AHF (/low-voltage-active-power-filter-reduce-the-harmonic-active-harmonic-filter-ahf-product/) e ile ea lekanyetsoa ka profeshenale matla boleng analyzer CA8336 ea Fora.Papiso ea data pele le ka morao ho APF e ile ea lekoa ka ho latellana.Ka mor'a ho sebelisa APF ea rona bakeng sa taolo ea harmonic, tekanyo ea kakaretso ea hona joale ea ho sotha (THDi) ea marang-rang a matla a sepetlele e fokotsehile ho tloha ho 10% ho ea ho 3%, 'me phello e bohlokoa haholo.
7. Kakaretso
Tsamaiso ea phepelo ea motlakase sepetleleng sena ke ea bohlokoa.Ho kenngoa ha lisebelisoa tse ncha tsa motlakase ho ntlafalitse haholo ts'ebetso ea bongaka le boleng ba sepetlele, hape ho fane ka tikoloho e ntle ea phekolo bakeng sa bakuli ba bangata.Empa matla a macha a matla a boetse a tlisa tšilafalo ea harmonic.Ho ba teng ha li-harmonics ho senya ts'ebetso e tloaelehileng ea marang-rang a matla a sepetlele mme ho ama botsitso ba lisebelisoa tsa kalafo tse nepahetseng.E le karolo ea tsamaiso ea marang-rang ea matla a sechaba, li-harmonics li eketsa tšebeliso ea motlakase lipetlele, e leng se khahlanong le lepetjo la naha la ho khothalletsa paballo ea matla.
Kamora hore filthara ea rona e sebetsang e kenngoe tšebetsong, e ntlafatsa haholo boleng ba marang-rang a matla a sepetlele, e felisa likotsi tsa ts'ireletso, e ntlafatsa matla a motlakase a bolokehileng le a hloekileng bakeng sa lisebelisoa tsa bongaka, 'me ka nako e ts'oanang e nahanela ho boloka matla le ho fokotsa tšebeliso.
Nako ea poso: Oct-16-2023