Inkqubo yobonelelo lombane yesibhedlele yeyenkqubo karhulumente, eyiyunithi yesiqinisekiso sobonelelo lombane kuzo zonke iindawo.Uyilo lwesakhiwo sesibhedlele ubukhulu becala lusebenzisa uhlobo oluphakathi, kwaye umthwalo wombane ungowodidi lomthwalo.Iindidi zayo eziphambili zombane ziquka: inkqubo yokukhanyisa, inkqubo ye-air conditioning, inkqubo yamandla onyango, inkqubo yokukhanyisa ngokukhawuleza.
Inkqubo yokukhanyisa kunye neyomoya yizona zithwala amandla kwiindidi ezahlukeneyo zokusetyenziswa kombane esibhedlele, eziza kuvelisa impendulo enkulu ye-harmonic kwigridi yamandla esibhedlele ngexesha lokusetyenziswa.Ngenxa yokusetyenziswa kweentlobo ezintsha zombane ezifana nomatshini we-X-ray, umatshini we-magnetic resonance MRI, umatshini we-CT, njl., ukusetyenziswa kombane otshintshileyo, i-UPS engaphazamisekiyo kunye nolunye inani elikhulu lemithwalo engabonakaliyo, nayo ivelisa ingxelo ye-harmonic igridi yamandla.
Isibhedlele sinomgangatho ophezulu wokusetyenziswa kombane, kwaye izixhobo zenkqubo zikhuselekile kwaye zithembekile njengeyona nto iphambili.Ngenxa yokusetyenziswa okukhulu komthwalo ongeyena umgca, iimpawu ze-harmonics ze-3, i-5 kunye ne-7 ye-oda ziveliswa ikakhulu kwinethiwekhi yamandla esibhedlele.I-Harmonics ichaphazela ngokuthe ngqo ukusebenza okuzinzile kwezixhobo zonyango ezichanekileyo, kunye nokuqokelela i-harmonics ye-3 kumgca ongathathi hlangothi kubangela ukushisa kumgca ophakathi, obeka ingozi ekusebenzeni ngokukhuselekileyo kwegridi yamandla esibhedlele.
2. Inkcazo kunye nesizukulwana se-harmonics
Inkcazo yeeharmonics: uthotho lweFourier ukubola kobungakanani beperiodic nonlinear sinusoidal quantity, ukongeza ekufumaneni icandelo elifanayo njengesiqhelo frequency yegridi yamandla, kodwa kunye nothotho lwamacandelo amakhulu kunophinda-phinda odityanisiweyo wokuphindaphinda okusisiseko kwamandla. igridi, le nxalenye yombane ibizwa ngokuba yi-harmonics.
Isizukulwana se-harmonics: Xa umbane uhamba ngomthwalo, kukho ubudlelwane obungenasiphelo kunye nombane womthwalo, owenza i-non-sinusoidal current, ebangela ukuba i-harmonics.
3. Ubungozi be-harmonics
I-1) I-Harmonics ikhokelela ekuphelelweni kwamandla okungafanelekanga kunye neengozi zokuphazamiseka kwezixhobo ezibangelwa ukungahambi kakuhle okanye ukwala ukukhuselwa kunye nezixhobo ezizenzekelayo, okubangela ilahleko eyongezelelweyo ebalulekileyo.
2) Ukonyuka kokuphindaphinda kwe-harmonic yangoku kubangela isiphumo esicacileyo solusu, esonyusa ukuxhathisa kweengcingo zamandla kunye nemigca yokuhambisa, kwandisa ilahleko yomgca, kwandisa ubushushu, ukuguga kwangaphambi kwexesha, kunciphisa ubomi, kubangela umonakalo, kwaye uqhelene nempazamo yesekethe emfutshane emhlabeni, yenze ingozi yomlilo.
3) Yenza i-resonance yegridi yamandla, iholele kwi-voltage ye-harmonic kunye ne-overcurrent, ibangele iingozi ezinzulu, umonakalo wembuyekezo ye-capacitor kunye nezinye izixhobo zombane.
4) I-Harmonics ichaphazela ukusebenza okuqhelekileyo kwezixhobo zombane ezahlukeneyo.Kukhokelela kwilahleko eyongezelelweyo kunye nokushisa okugqithisileyo kweenjini ze-asynchronous kunye ne-transformers, elandelwa yi-vibration yomatshini, ingxolo kunye nokugqithisa, ukunciphisa ukusebenza kakuhle kunye nokusetyenziswa, kunye nokunciphisa ubomi benkonzo.
I-5) Ukuphazamiseka konxibelelwano olusondeleyo, izixhobo zokulawula i-elektroniki okanye ngokuzenzekelayo, okanye ziyenze ukuba ingakwazi ukusebenza ngokuqhelekileyo.
4. Iskimu sokuhluza
Isibhedlele saseShaanxi Central sisibhedlele esikumgangatho wesibini kuzwelonke esinezixhobo zonyango eziphambili kunye nokusingqongileyo okugqwesileyo kwesibhedlele.Abasebenzi bethu abachwephesha kunye nezobugcisa baphathiswe esibhedlele kwisigaba sokuqala ukulinganisa umgangatho wamandla wegridi yamandla e-low-voltage esibhedlele.Ireyithi yokuphazamiseka ngokupheleleyo yangoku kwigridi yamandla esibhedlele yi-10%, isasazwa ngokubanzi kwiimpawu ze-harmonics ze-3, i-5 kunye ne-7.Ngokweziphumo zovavanyo, inkampani yethu iye yaqulunqa iseti yomthamo we-400A isixhobo sokucoca esisebenzayo esibhedlele, esifakwe kwicala le-transformer low voltage outlet side, ukusetyenziswa konyango oluphakathi kulawulo lwe-harmonic.
Isihluzi esi-5 esiSebenzayo(/ 690v-esebenzayo-amandla-imveliso-yesihluzi-imveliso/)
5.1 Intshayelelo yeMveliso
Isihluzi saMandla asebenzayo (/noker-3-phase-34-wire-active-power-filter-apf-ahf-for-dynamic-harmonics-compensation-product/) luhlobo olutsha lwesixhobo sombane esisetyenziselwa ukucinezela ngamandla kunye Buyekeza amandla asebenzayo, anokubuyisela iharmonics kunye notshintsho lwamandla asebenzayo kubungakanani kunye namaxesha.
5.2 UMmiselo wokuSebenza
Umthwalo wangoku ufunyenwe ngexesha langempela yi-CT yangaphandle, kwaye ixabiso le-harmonic libalwa yi-DSP yangaphakathi.Ngokusebenzisa umqondiso we-PWM uthunyelwa kwi-IGBT, i-inverter ivelisa i-harmonic yangoku ilingana nomthwalo we-harmonic kunye nolunye uhlangothi oluchasene negridi yamandla ukucima i-harmonic kunye nokufezekisa injongo yokucoca igridi yamandla.
6 .Ukubeka iliso kunye nohlalutyo lwedatha yokulawula i-harmonics kwizibhedlele
IKhabhinethi ye-APF
Idatha ye-APF (/harmonics-compensation-200400v-active-harmonic-filter-ahf-module-triple-phase-product/) imbuyekezo ye-harmonic esibhedlele yayibekwe esweni ngumhlalutyi womgangatho wamandla we-CA8336 waseFransi, kunye nedatha yomgangatho wamandla zavavanywa ngokulandelanayo phantsi kweemeko ezimbini zokusebenza kwe-APF (emva kwembuyekezo) kunye nokuvalwa (ngaphandle kwembuyekezo), kwaye idatha yashwankathelwa kwaye yahlalutywa.
6.1 Umlinganiselo kunye nocazululo lwee-APFs(/3-phase-3-wire-active-power-filter-400v-75a-apf-panel-product/) igalelo kunye nokususwa kwedatha
1:Ixabiso elisebenzayo lokuqhuba kwangoku
2:THDi phambi kokucoca okusebenzayo
3:THDi emva kokucoca okusebenzayo kuqhagamshelwe
4:THDi ukusuka kumhla woku-1 ukuya kowesi-5 phambi kokuba isihluzi esisebenzayo siqhagamshelwe
5:THDi ukusuka 1st ukuya 5th emva Active filter edityanisiweyo
6:THDi ukusuka kumhla woku-1 ukuya kowesi-7 phambi kokuba isihluzi esisebenzayo siqhagamshelwe
7:THDi ukusuka 1st ukuya 7th emva Active filter edityanisiweyo
Isiphumo:
| APF | I-THDi (iphelele) | THDi (5th) | THDi (7th) |
| Ngaphambi kokuba i-APF idibanise | 10% | 9% | 3.3% |
| Emva kokudibanisa i-APF | 3% | 3% | 0.5% |
Njengoko kuboniswe kulo mfanekiso ungentla, ulawulo lwe-harmonic lwesibhedlele nge-AHF (/low-voltage-active-power-filter-reduce-the-harmonic-current-active-harmonic-filter-ahf-product/) yalinganiswa kunye Umhlalutyi womgangatho wamandla oqeqeshiweyo CA8336 waseFransi.Ukuthelekiswa kwedatha phambi nasemva kwe-APF kwavavanywa ngokulandelelanayo.Emva kokusebenzisa i-APF yethu yokulawula i-harmonic, ireyithi ye-distortion yangoku (THDi) yenethiwekhi yamandla esibhedlele iyancitshiswa ukusuka kwi-10% ukuya kwi-3%, kwaye umphumo ubaluleke kakhulu.
7. Isishwankathelo
Inkqubo yobonelelo lombane yesibhedlele ibalulekile.Ukuqaliswa kwezixhobo ezitsha zombane kuye kwaphucula kakhulu ukusebenza kakuhle kwezonyango kunye nomgangatho wesibhedlele, kwaye kwabonelela ngendawo yonyango elungileyo kuninzi lwezigulane.Kodwa umthwalo omtsha wamandla uzisa nongcoliseko lweharmonic.Ubukho be-harmonics bulimaza ukusebenza okuqhelekileyo kwegridi yamandla esibhedlele kwaye kuchaphazela ukuzinza kwezixhobo zonyango ezichanekileyo.Njengenxalenye yenkqubo yothungelwano lwamandla oluntu, ii-harmonics zonyusa ukusetyenziswa kombane ezibhedlele, nto leyo echasene neslogan yesizwe yokukhuthaza ukongiwa kwamandla.
Emva kokuba isihluzo sethu esisebenzayo sifakwe ekusebenzeni, siphucula kakhulu umgangatho wegridi yamandla esibhedlele, sisusa iingozi zokhuseleko, siphucula amandla ombane akhuselekileyo nacocekileyo kwizixhobo zonyango, kwaye kwangaxeshanye kuthathela ingqalelo ukonga amandla kunye nokunciphisa ukusetyenziswa.
Ixesha lokuposa: Oct-16-2023