I-PIAPF yenkqubo yokulungisa iphulitha lokusebenza

Indima ekuhlukeni kwaleli filter leliyilfilter le-PIAPF yisiko esibandakanya ukuthintana nobunzima bakho ukuthintana ne-harmonic current engeza yindlela yokusebenza yalo: ukuthinta ngokushesha nokucacileyo - ukuhlaziywa kwe-Fourier kusheshayo - ukulayisha kwe-harmonic current okucacileyo

Ngokuthiwa neqembu elisebenzisa isikrweletu kanye neqembu elisebenzisa ukwenza ngokushesha, esisekelwe kumathini we-DSP weziviko eliphezulu, umsebenzi we-signal processing, umsebenzi we-fast Fourier, kanye ne-algorithm ye-instantaneous reactive power theory, kanye neqembu lokusebenzisa amandla we-PWM, ngemuva kokuhlolwa kanye ne-analysis ngokushesha kwe-harmonics yedolo, ngodonga olufanayo, i-PIAPF active power filter iya kuthumela amandla we-harmonic esiyodwa neyo evela kumathini. Amandla we-harmonic anesihlangothi kanye ne-amplitude athi ayafakwa ngokwezifiso.

Lo vumelwano liyavumela i-JB/T 11067-2011 "Low-Voltage Power Active Power Filter Device" kanye naye yitholwe i-third-party type test report.

I-filter current ezingenako kumodhuli oyedlwe yi-50A / 75A / 100A / 150A / 200A
I-filter current ephindwa ngokwekhalenda yi-800A

◆ Shesha: Ukulandelana kanye nokulungisa ngokwesikrweletu, impendulo elisha, isikhathi sokuphendula ngokushesha ≤ 1ms, isikhathi esifanayo sokuphendula ≤ 10ms

◆ Okulandelwe: I-FFT enkulu kanye nezibonelo zokuchazwa, esebenza ngokuphelele kwe-2nd elikhulu kuma-61st amaphasi, ngokuchithwa okuphelele noma ukuchithwa okukhethwa ngokulandelwe

◆ Ukusebenza kahle: Ngokuba yindlela yokunyakaza, ukutholakala kwe-harmonics kugcinwa ku-≤ 5%, ngekusebenzayo kwekuchithwa, ukunyakaza okuncane, kungase kubeke ngokwenza kwezimpedansi

◆ Okuthulile: I-LCR encwadini kanye nezibonelo zokulahla zokunyakaza zokuthola ngokuzenzekela, engenazo amathiphu. Izinkinobho eziningi zokuphela kusisusa isebenza sakhiwa ngokuthulile kanye nokusebenza okuthulile

◆ Ukuxhumeka: Ingakuchitha i-harmonic current, i-reactive power futhi yilapha iindlela ezintathu, ngezinkinobho eziningi kwi-1

◆ Ukuwazi: Ukubonakala ngokwabo, ukugcina amathiphu edlule, i-RS485 interface + i-MODBUS, ukugcina ngaphandle

Izinto ezifakwe

◆ IGBT yamandla ephindwa ngokusheshayo

◆ Isicathamiya esijwayelekileyo DC esikhethekileyo yokugcinwa kwezimali

◆ Imodi ye-LCR yokubika

◆ I-DSP imininingo yokuchithwa kwezinyathelo nezokuxhumana

◆ I-FPGA imithwalo yokungenisa imithwalo nezokuphatha

◆ Isikrini esijwayelekileyo sokugcina, uhlelo lwemigwijo olungileyo

• Isakhiwo kanye nekukhetha

Ukudwelisa Umehluko Lweharmoniki

Kumasebenzi amakhulu okugcinwa kweharmoniki, ukusebenzisa kwehlangothini kuyisiko lokusebenzayo, futhi ukusebenzisa okudlule okudlule kuyinhawu kanye nokubaluleka; kumasebenzi amancane angaphansi kweharmoniki, ngokuba yinkimbiningi kakhulu kanye nezinhlobo eziningi zokuthile, okungenzeka ukuthi kuhlanganise nezinhlobo kanye nezinhawu zokugcinwa, ukusebenzisa okugcwele kuyisiko lokusebenzayo.

Ngenxa ye-flow kunye neengcinga zokuguqula kwe-harmonics, ukuba kufuneka udizaynwe inkqubo yokulungisa i-harmonics okanye i-filter yekhahamelo, amanani e-harmonics angachwanga ngokusebenzisa i-power quality analyzer. Le meko iyasebenza kwi-harmonics zee-grid zokulula ngaphambili okanye i-grid zokulula eziqinisekileyo. Ngaphawu, ukuyacoca ukuba iidata yochwanga iyahlathiweyo kunye nokuchanekileyo, kufuneka wazi ngempumelelo iimpawu zokusebenza kwaye unqamle iindlela zokusebenza zee-harmonics, ukuqonda i-structure yee-grid zokulula, kunye noku sebenzisa i-harmonic testers enokuthobela kwaye iindlela zochwanga ezichanekileyo zokulingana ne-Appendix D inye ne-GB/T 14549-1993 "Power Quality - Public Power Grid Harmonics". Kodwa, kwiiprojekthi eziintsha apho kuphela kwiqondo lokudizayna, abadizayna bokulula bangelwa ukufumana i-harmonics ezifanayo zokusebenza. Ngoko ke, ngokuchwanga kunye neengqiqo zokuqala kwiindlela zokusebenza, iindlela ezibonakalayo zilandelwa abadizayna bokulula xa badizayna kunye nobhala.

Izifomula eziyisisekelo ngazo zingakuxhomekeka kakhulu kwiingxelo zokulungisa, futhi isikhombisi sokulungisa kungakhethwa ngokulinganisa kwe-harmonic yekhurenti.

◆ Ukulandelana ngokuphelele:

Ukulungiswa ngokuphelele kuyasebenzisa kwiimpendulo zokusebenza apho kuneengxenye eziningi zemali, inani elikhulu lezilo ezingenakuphinda kabili, futhi kuncane ukuningi kwe-harmonic yekhurenti nganye. Iindleke zokulungisa i-PIAPF zingasetshenziswa kwiindlela zokungena ngaphantsi kwevulti ukuze kwenzeke ukulungiswa ngokuphelele kwe-harmonic kwisistimu yemali.

* Qaphela: Ifomula ngasentla iyasebenzisa kwiindlela zokulungiswa ngokuphelele kwi-elekthrodi yesibili yotransformer.

Lapho: S: amandla wotransformer; U: ivolti ejwayelekile yesibili yotransformer; K: isamba sokusebenza; IHR: ikhurenti yeharmonic; THDi: ubungu obuphelele bokulinganisa ikhurenti.

Isilinganiso:

K ikhombisa inqanawa yalo lombakiso, kwaye yindlela yokuba yona 0.6-0.85 kwimbadiso yombakiso; THDi yinto evela ngokuxhomekeko kwiindlela ezilandelayo, kwaye yindlela yokuba yona ifanakalo kwiindlela ezahlukene kwaye kwiinqanawa ezahlukene ngamnye indlela.

◆ Ukulungisa kwiNdawo:

Ukugcinwa kwiNdawo kufanelekileyo kwiindlela zokunyela umoya olunye lweharmonics kwaye lunezicatshulwa eziphambene. Ukuze kubekele PIAPF iifilta ezenjini kwinqa yalo lwe-ndawo kungakukho ukulungiswa okulungileyo. Ukuba kukho umoya oluphezulu olunye lweharmonics kwiindlela zokunyela umoya, ukulungisa kwi-ndawo nokwenza kwiinqa yalo lwe-ndawo. Inokubalwa ngokusebenzisa iFomula 2 ngasentla.

Apha I ikhombisa inqanawa yombakiso wokubekwa. Iifomula ngasentla zaziqaphela kuphela ukusebenza kwe-ndawo ngokuqhelekileyo (K=1). Inqanawa yokuqala ye-NK kufuneka iqhutshwe ngokwenyani kwiimbadiso, njengoko kubonisiwe kwiFomula 3.

◆ Iifomula yokulinganisa:

Iifomula yokulinganisa le 4 inokusetyenziswa kumiselwano ngonaphakade:

Ukulandela kwe-harmonic current okubalwe phezulu, futhi ngokwemithambo edlule ye-PIAPF, qinisekisa ukuthi yini okudingekayo. Amathuluzi wokufaka kwe-PIAPF angachagwa ngokusho Formula 5, futhi le khowffisienti edlule iyizophakathi ukuthi i-APF inezimathiswano ephakathi.

I-IA iyochaza amathuluzi wokufakwa kwe-APF, futhi I-IHR iyochaza ukudluliselwa kweharmonics.

Qaphela: Ukunyelelwa kwezinye izinto phezulu kuvumela ukuthi THDi iyinhloko yokuguqulwa, obala balela kwi "I-APF Selection Quick Reference Table" futhi kwi "Summary of Harmonic Treatment in Various Industries".

Isiqephu sokulandelwa kwe-Harmonics kuhulumeni lwesifundo ngalunye

Izilandelwele eziphakeme zokukhiqizwa ngokweqile ngokwezinhlobo zezilandelwele

Inombolo ye ● ichaza ubume bokululeka kwekhwameli. I-●●● ichaza ukululeka okukhulu; I-●● ichaza ukululeka okuphakathi; I-● ichaza ukululeka okuncane.

Ngokuvumelwe, izinhlelo ezingenaphethini yokulandelana kweqonga linye linamakhawunti obungako ngamanye.

Amakhawunti obungako amathathu kweqingo lokuqina lizindanda ngendlela elandelayo: izinhlelo ezingenaphethini ezine amakhawunti 6 ezinamakhawunti obungako amathathu kanye nezinye zingaba ngu-5, 7, 11, 13, 17, 19..., yehla ngu-6K±1, lapho K=1, 2, 3... kuyizinombolo eziqondile; xa isisindo sedvwa kweqingo lapho kungenaphethini kungu-12, amakhawunti obungako amathathu kanye nezinye zingaba ngu-11, 13, 23, 25..., yehla ngu-12K±1, lapho K=1, 2, 3... kuyizinombolo eziqondile.