Uhlelo lokuphakelwa kukagesi esibhedlela lungolohlelo lukahulumeni, okuyiyunithi yesiqinisekiso sokuphakelwa kukagesi kuzo zonke izindawo.Idizayini yesakhiwo sesibhedlela ngokuvamile isebenzisa uhlobo oluphakathi nendawo, kanti umthwalo kagesi ungowesigaba somthwalo.Izinhlobo zayo eziyinhloko zikagesi zihlanganisa: uhlelo lokukhanyisa, uhlelo lwe-air conditioning, uhlelo lwamandla ezokwelapha, uhlelo lokukhanyisa oluphuthumayo.
Uhlelo lokukhanyisa kanye ne-air conditioning luyimithwalo eyinhloko yamandla ezinhlotsheni ezihlukahlukene zokusetshenziswa kukagesi wasesibhedlela, okuzokhiqiza impendulo enkulu ye-harmonic kugridi yamandla esibhedlela ngesikhathi sokusetshenziswa.Ngenxa yokusetshenziswa kwezinhlobo ezintsha zikagesi ezifana nomshini we-X-ray, umshini kazibuthe we-MRI, umshini we-CT, njll., ukusetshenziswa kokushintshwa kwamandla kagesi, i-UPS engaphazamiseki kanye nenani elikhulu lemithwalo engaqondile, nakho kukhiqiza impendulo evumelanayo igridi yamandla.
Isibhedlela sinezinga eliphezulu lokusebenzisa ugesi, futhi imishini yesistimu iphephile futhi ithembekile njengesici esiyinhloko.Ngenxa yokusetshenziswa okukhulu komthwalo ongaqondile, i-harmonics yesici ye-3rd, 5th kanye ne-7th order ikhiqizwa ikakhulukazi kunethiwekhi yamandla esibhedlela.I-Harmonics ithinta ngokuqondile ukusebenza okuzinzile kwemishini yezokwelapha enembile, futhi ukuqoqwa kwama-harmonics angu-3 emugqeni ongathathi hlangothi kubangela ukushisa emgqeni ophakathi, okufaka engozini ukusebenza okuphephile kwegridi yamandla esibhedlela.
2. Incazelo kanye nesizukulwane sama-harmonics
Incazelo yama-harmonics: uchungechunge lwe-Fourier ukubola kwenani le-sinusoidal elingena-linear ngezikhathi ezithile, ngaphezu kokuthola ingxenye efanayo nemvamisa eyisisekelo yegridi yamandla, kodwa futhi nochungechunge lwezingxenye ezinkulu kunokuphindaphinda okubalulekile kwemvamisa eyisisekelo yamandla. igridi, le ngxenye kagesi ibizwa ngokuthi i-harmonics.
Isizukulwane se-harmonics: Lapho i-current igeleza ngomthwalo, kukhona ubudlelwano obungaqondile ne-voltage yomthwalo, eyenza i-non-sinusoidal current, okuholela kuma-harmonics.
3. Ukulimala kwama-harmonics
I-1) I-Harmonics iholela ekuhlulekeni kwamandla okungafanele kanye nezingozi zokuphazamiseka kwemishini ebangelwa ukusetshenziswa kabi noma ukwenqatshwa kokuvikelwa kanye namadivayisi azenzakalelayo, okuholela ekulahlekelweni okukhulu okwengeziwe.
2) Ukwanda kwemvamisa yamanje ye-harmonic kubangela umphumela osobala wesikhumba, okwandisa ukumelana kwezintambo zezintambo zamandla kanye nemigqa yokusabalalisa, kwandisa ukulahlekelwa komugqa, kwandisa ukushisa, ukuguga ngaphambi kwesikhathi ukuguga, kufinyeze impilo, kubangela umonakalo, futhi ijwayele ukwenza iphutha lesekethe emfishane, okwenza ingozi yomlilo.
I-3) Yenza i-resonance yegridi yamandla, iholele ku-harmonic voltage kanye ne-overcurrent, ibangele izingozi ezimbi, isinxephezelo se-capacitor esilimazayo nezinye izinto zokusebenza zikagesi.
4) I-Harmonics ithinta ukusebenza okuvamile kwemishini ehlukahlukene kagesi.Kuholela ekulahlekelweni okwengeziwe kanye nokushisa ngokweqile kwama-asynchronous motors nama-transformer, okulandelwa ukudlidliza komshini, umsindo nokugcwala ngokweqile, ukunciphisa ukusebenza kahle nokusetshenziswa, kanye nokunciphisa impilo yesevisi.
5) Ukuphazamisa ukuxhumana okuseduze, okokusebenza kwe-elekthronikhi noma okuzenzakalelayo, noma kuyenze ingakwazi ukusebenza ngendlela evamile.
4. Isikimu sokuhlunga
I-Shaanxi Central Hospital yisibhedlela sikazwelonke esisezingeni lesibili A esinemishini yezokwelapha ethuthukisiwe nendawo yesibhedlela enhle kakhulu.Izisebenzi zethu ezichwepheshile nezobuchwephesha zaphathiswa isibhedlela kusenesikhathi ukukala ikhwalithi yamandla wegridi yamandla e-low-voltage esibhedlela.Inani eliphelele lokuhlanekezela lamanje kugridi yamandla esibhedlela liyi-10%, elisatshalaliswa ikakhulukazi kuma-harmonics wesici se-3rd, 5th and 7th order.Ngokwemiphumela yokuhlolwa, inkampani yethu ilungiselele isethi yomthamo we-400A idivayisi yokuhlunga esebenzayo esibhedlela, efakwe ohlangothini lwe-transformer low voltage outlet, ukusetshenziswa kokwelashwa okuphakathi kokulawula i-harmonic.
5 Isihlungi Esisebenzayo(/690v-active-power-filter-product/)
5.1 Isingeniso Somkhiqizo
Isihlungi Samandla Asebenzayo(/noker-3-phase-34-wire-active-power-filter-apf-ahf-for-dynamic-harmonics-compensation-product/) siwuhlobo olusha lwedivayisi ye-elekthronikhi yamandla esetshenziselwa ukucindezela ngamandla ama-harmonics kanye nxephezela amandla asebenzayo, anganxephezela ama-harmonics kanye nezinguquko zamandla asebenzayo ngosayizi nobuningi.
5.2 Umgomo Wokusebenza
Umthwalo wamanje utholwa ngesikhathi sangempela yi-CT yangaphandle, futhi inani le-harmonic libalwa yi-DSP yangaphakathi.Ngokusebenzisa isignali ye-PWM ithunyelwa ku-IGBT, i-inverter ikhiqiza i-harmonic yamanje elingana ne-harmonic yomthwalo futhi ngakolunye uhlangothi ingene kugridi yamandla ukuze isuse i-harmonic futhi ifinyelele injongo yokuhlanza igridi yamandla.
6 .Ukuqapha nokuhlaziya idatha yokulawula i-harmonics ezibhedlela
Ikhabethe le-APF
Idatha yesinxephezelo se-APF(/harmonics-compensation-200400v-active-harmonic-filter-ahf-module-triple-phase-product/)i-harmonic esibhedlela iqashwe umhlaziyi wekhwalithi yamandla i-CA8336 yase-France, kanye nedatha yekhwalithi yamandla zahlolwa ngokulandelana ngaphansi kwezimo ezimbili zokusebenza kwe-APF (ngemuva kwesinxephezelo) nokuvalwa (ngaphandle kwesinxephezelo), futhi idatha yafingqwa futhi yahlaziywa.
6.1 Ukulinganisa nokuhlaziywa kwama-APF(/3-phase-3-wire-active-power-filter-400v-75a-apf-panel-product/) okokufaka nokususwa kwedatha
1:Inani elisebenzayo lokugijima kwamanje
2:THDi ngaphambi kokuba isihlungi esisebenzayo sixhumeke
3: I-THDi ngemuva kokuxhumeka kwesihlungi esisebenzayo
4:THDi kusukela kowoku-1 kuye kowesi-5 ngaphambi kokuthi kuxhunywe isihlungi esisebenzayo
5:THDi kusukela kowoku-1 kuye kowesi-5 ngemva kokuxhunywa kwesihlungi esisebenzayo
6:THDi kusuka kowoku-1 kuye kowesi-7 ngaphambi kokuthi kuxhunywe isihlungi esisebenzayo
7:THDi kusuka kowoku-1 kuye kowesi-7 ngemuva kokuxhunywa kwesihlungi esisebenzayo
Umphumela:
| I-APF | I-THDi (inani) | I-THDi (5th) | I-THDi (7th) |
| Ngaphambi kokuxhuma kwe-APF | 10% | 9% | 3.3% |
| Ngemuva kokuxhuma kwe-APF | 3% | 3% | 0.5% |
Njengoba kuboniswe esithombeni esingenhla, ukulawulwa kwe-harmonic kwesibhedlela nge-AHF(/low-voltage-active-power-filter-reduce-the-harmonic-current-active-harmonic-filter-ahf-product/) kukalwa nge- umhlaziyi wekhwalithi yamandla ochwepheshe i-CA8336 yaseFrance.Ukuqhathaniswa kwedatha ngaphambi nangemva kwe-APF kwahlolwa ngokulandelana.Ngemva kokusebenzisa i-APF yethu yokulawula i-harmonic, inani eliphelele lamanje lokuhlanekezela (THDi) lenethiwekhi yamandla esibhedlela liyehla lisuka ku-10% liye ku-3%, futhi umphumela ubaluleke kakhulu.
7. Isifinyezo
Uhlelo lokuphakelwa kukagesi esibhedlela lubalulekile.Ukwethulwa kwemishini emisha kagesi kuye kwathuthukisa kakhulu ukusebenza kahle kwezokwelapha kanye nekhwalithi yesibhedlela, futhi kwanikeza indawo enhle yokwelashwa kweningi leziguli.Kodwa umthwalo omusha wamandla uletha nokungcoliswa kwe-harmonic.Ukuba khona kwama-harmonics kulimaza ukusebenza okuvamile kwegridi yamandla asesibhedlela futhi kuthinta ukuzinza kwemishini yokwelapha enembayo.Njengengxenye yohlelo lwamagridi kagesi womphakathi, ama-harmonics akhulisa ukusetshenziswa kukagesi ezibhedlela, okuphambene nesiqubulo sikazwelonke sokugqugquzela ukongiwa kukagesi.
Ngemva kokuthi isihlungi sethu esisebenzayo sesiqalile ukusebenza, sithuthukisa kakhulu ikhwalithi yegridi yamandla esibhedlela, siqede izingozi zokuphepha, sithuthukise amandla kagesi aphephile nahlanzekile emishini yezokwelapha, futhi ngesikhathi esifanayo sicabangela ukonga amandla kanye nokunciphisa ukusetshenziswa.
Isikhathi sokuthumela: Oct-16-2023