Chisankho Chomwe Mumakonda Pa Chitetezo cha DC Chokwera - Kupambana Kwawiri Pakugwira Ntchito Ndi Kudalirika kwa Switch Yodzipatula ya DC

Chifukwa cha kukula kwa mphamvu zatsopano mwachangu, makina amphamvu a DC (HVDC) amagwiritsidwa ntchito kwambiri mu photovoltaic (PV), malo osungira mphamvu ndi sitima. Kugwira ntchito kwawo motetezeka ndikofunikira kwambiri, chifukwa njira yokhazikika ya HVDC komanso kusowa kwa njira zachilengedwe zodutsa magetsi kumapangitsa kuti chitetezo cha kudzipatula ndi cholakwika chikhale chovuta. Chifukwa chake, zida zodzipatula zogwira ntchito komanso zodalirika ndizofunikira.

Monga chipangizo chofunikira kwambiri choteteza HVDC,Chosinthira cha DC Isolation(DC disconnect switch) imachotsa ma circuit, imadula zolakwika, ndikuonetsetsa kuti ndi yotetezeka. Mosiyana ndi ma AC switch, idapangidwa mwapadera kuti ikhale ndi ma DC arc ovuta kuzimitsa, ndipo magwiridwe ake pansi pa voltage yayikulu amatsimikizira mwachindunji kuchuluka kwa chitetezo cha makina.

Nkhaniyi ikufotokoza momveka bwino zaChosinthira cha DC IsolationKupambana kwa magwiridwe antchito ndi kudalirika, kusanthula kufunika kwake kwakukulu mu chitetezo cha HVDC kuti chitsogolere kusankha kwa mapulogalamu.

Zochitika za HVDC zimafuna magwiridwe antchito a switch yodzipatula kwambiri, kuphatikizapo kulolerana kwamagetsi amphamvu komanso kuletsa bwino arc. DC Isolation Switch imakwaniritsa zinthu ziwiri kuti ikwaniritse zosowa izi.

Mu kulekerera kwamphamvu kwa magetsi, mbadwo watsopanowu uli ndi kusinthidwa kwa kapangidwe kake ndi zinthu, zomwe zimasintha kukhala 1500VDC ndi pansi (ndipo pamwamba pa mapulojekiti apadera). Kuteteza kwamphamvu kwambiri komanso kulumikizana koyenera kumaletsa kuwonongeka. Malinga ndi "Miyezo Yapadera ndi Zofunikira pa Zosintha za DC Isolation za Mapulogalamu a Photovoltaic", ma switch ogwirizana ndi IEC 60947-3 amagwira ntchito mokhazikika pamagetsi ovotera, ndipo kutentha kwa copper conductor kumakwera ≤60K.

Kuti zigwire bwino ntchito, kuzimitsa kwa arc-arc kopitilira muyeso komanso kusweka kwa ma point ambiri kumaletsa mwachangu ma DC arcs (omwe alibe njira yolumikizirana mwachilengedwe). Mwachitsanzo, ma switch a ABB Emax series amakwaniritsa kusweka kotetezeka kwa 1500V DC / 100kA, kupewa zolakwika.

Kusintha kumeneku kumaphwanya malire achikhalidwe a switch, zomwe zimapangitsa kuti mapulojekiti a HVDC azigwira ntchito bwino.

Kupatula magwiridwe antchito, DC Isolation Switch yatsopanoyi imawonjezera kudalirika, kuthetsa nthawi yochepa yogwira ntchito komanso mavuto okonza zinthu m'malo ovuta.

Ma contact ogwiritsidwa ntchito kwambiri komanso ma transmission okonzedwa bwino amawonjezera moyo wa makina mpaka ntchito zoposa 10,000, zomwe zimachepetsa kukonza ndi ndalama—zabwino kwambiri pamapulojekiti akuluakulu a PV ndi malo osungira magetsi.

Ndi chitetezo cha IP66, chimalimbana ndi kutentha kwambiri (-40℃ mpaka 85℃), chinyezi ndi kupopera mchere, zomwe zimapangitsa kuti ntchito yakunja/mafakitale ikhale yokhazikika.

Imakwaniritsanso miyezo ya IEC 60947-3 ndi GB/T 14048.3, kutsimikizira chitetezo ndi kutsatira malamulo.

Ndi njira ziwiri zotulukira, DC Isolation Switch imagwiritsidwa ntchito kwambiri m'magawo apakati a HVDC: mbali za DC za chomera cha PV (kudzipatula panthawi yokonza), makina osungira mphamvu (kupatula batri-converter), ndi magetsi a DC oyendera njanji/mafakitale (kudula zolakwika).

1. "Miyezo Yapadera ndi Zofunikira pa Satifiketi ya DC Isolation Switches pa Mapulogalamu a Photovoltaic" — China Electrical Equipment Industry Association

2. Muyezo wa IEC 60947-3: Chosinthira chamagetsi otsika ndi zida zowongolera — Gawo 3

3. Buku Lopangira Zosinthira la ABB Emax Series DC Isolation

Q1: Kodi kusiyana kwakukulu pakati pa ma switch a DC ndi AC isolation ndi kotani? A1: Ma switch a DC amagwiritsa ntchito arc-extinguishing apadera (monga, magnetic blow) pa ma DC arc ovuta kuzimitsa; ma switch a AC amadalira zero-crossing ya AC arc.

Q2: Kodi ndi magetsi otani omwe ingasinthe? A2: 1500VDC ndi pansi pake; zinthu zina zimathandiza milingo yapamwamba pamapulojekiti apadera.

Q3: Kodi mungatsimikizire bwanji kuti ndi yodalirika m'malo ovuta? A3: Chitetezo cha IP66, zipangizo zosagwira dzimbiri komanso kapangidwe kake kolimba kuti kasamavutike kwambiri.