Makiyi Atatu Osankhira Ma 1500V DC Breakers mu Utility-Scale Solar

Nayi nkhani yanu yokonzedwa bwino komanso yokonzedwa bwino, yoyenera kufalitsidwa mwachindunji kwa akatswiri apadziko lonse lapansi.

Mutu: "Vavu Yotetezera" ya Zomera Zazikulu za PV Zakunja: Buku Lothandiza Posankha 1500V Chothyola Dera la Dcs (Ndi Kafukufuku wa Nkhani Yeniyeni)

Chiyambi

Pamene makina a 1500V DC akukhala chisankho chachikulu cha mapulojekiti akuluakulu a dzuwa akunja chifukwa cha mtengo wawo wokwera komanso ubwino wake wogwira ntchito bwino, vuto lalikulu koma lomwe nthawi zambiri silimaganiziridwa bwino limabuka: kusankha ndi kukonza bwino magetsi. Zosokoneza ma DC circuit.​Kusankha kolakwika kungayambitse zolakwika pafupipafupi, kuchedwa kwa polojekiti, kapena ngakhale zochitika zachitetezo, zomwe zingawononge ubwino wonse womwe ungakhalepo. Bukuli likufotokoza bwino magawo atatu ofunikira, kuphatikiza zochitika zenizeni za polojekiti zakunja, kuti lipereke njira yomveka bwino yosankhira, kukonza, ndikuyika 1500V. Chothyola Dera la Dcs, kukuthandizani kupewa mavuto omwe amapezeka nthawi zambiri ndikuonetsetsa kuti chomera chikugwira ntchito bwino.

1. Magawo atatu a Core: Voltage, Breaking Capacity, ndi Protection Curve

Kusankha kumanja Chothyola Dera la Dc Pa makina a PV olumikizidwa ndi gridi ya 1500V, kudalira kumvetsetsa magawo atatuwa, mogwirizana ndi miyezo monga IEC 60947-2 ndi IEC 60269.

1.1 Voltage Yovomerezeka: Iyenera Kupitirira Voltage Yokwanira Kwambiri Yozizira ya PV String

Ichi ndiye chofunikira kwambiri komanso chofunikira kwambiri. Voltage yovomerezeka ya chopachikira iyenera kukhala yokwera kuposa voteji yotseguka ya chingwe cha PV, yomwe imawonjezeka m'malo ozizira.

• Chitsanzo:Chingwe chogwiritsa ntchito ma module 48 a monocrystalline (32V Voc iliyonse) chili ndi Voc yodziwika bwino ya 1536V.

• Kuwerengera Kofunika Kwambiri:Voliyumu ya module imakwera ndi ~0.3% pa ​​°C pansi pa 25°C. Mu malo okhala ndi -20°C, voltage imatha kufika: 1536V x (1 + 0.003 x 45) ≈ 1740V.

• Lamulo Losankha: Chifukwa chake, muyenera kusankha chotseka chomwe chili ndi voltage yovomerezeka ≥ 1800V DC, osati 1500V DC. Chiyeso cha 1800V chimapereka malire ofunikira kuti mupewe kulephera kwa insulation m'madera ozizira monga Northern Europe kapena Canada.

1.2 Kutha Kuswa Mphamvu (Icu/Ics): Kufananiza Mphamvu ya PV String Short-Circuit Current

Izi zimafotokoza kuchuluka kwa magetsi afupikitsa omwe chopasula magetsi chingasokoneze bwino.

• Icu (Ultimate Breaking Capacity):Mphamvu yayikulu yomwe ingasokoneze kamodzi (siingagwiritsidwenso ntchito).

• Ics (Kutha Kuthetsa Utumiki):Mphamvu yake imatha kusokoneza kangapo pamene ikugwira ntchito.

• Chitsanzo ndi Malangizo:Pa chingwe chokhala ndi mphamvu yafupikitsa (Isc) ya 15kA, sankhani choyatsira magetsi chokhala ndi Ics > 15kA (monga, 16kA) ndi Icu yofanana nayo (monga, 25kA). Pa mafakitale akuluakulu (>50MW), ganizirani zoyatsira magetsi zokhala ndi Icu ≥ 35kA​ kuti zithetse mavuto omwe angabwere chifukwa cha zingwe zingapo.

1.3 Chitetezo Chokhota (Mtundu B/C/D): Kuletsa Kugundana ndi Zovuta

Kusankha njira yoyenera yokhotakhota ndikofunikira kwambiri kuti mupewe kuyenda kosafunikira kuchokera ku mafunde olowera pamene mukuonetsetsa kuti chitetezo ku zolakwika zenizeni.

• Chitsanzo:Pa makina a 1500V okhala ndi ma inverter a zingwe a 500kW, sankhani Mtundu CIzi zimapirira kukwera kwa inverter pamene ikuyamba kugwira ntchito komanso zimapereka chitetezo chodalirika cha overload ndi short-circuit.

2. Kakonzedwe ka Pamalo: Bokosi Lophatikiza & Mbali Yosinthira

Kukhazikitsa koyenera ndikofunikira monga momwe kusankha koyenera kulili kofunikira.

• Mu Bokosi Lophatikiza la PV:

  • Gwiritsani ntchito chimodzi 1800VDC-adavoterachoswa chingwe chilichonse.

  • Sungani ≥ mtunda wa 30mmpakati pa zopumira kuti zichotse kutentha m'malo obisika akunja.

  • Gwiritsani ntchito moyenera zingwe za DC zoletsa moto(monga, PV1-F, yoyesedwa ≥ 1800V).

  • Onetsetsani kuti zatha mwamphamvukupewa kutentha.

  • Pukutani malo opumulirakobwino (chingwe cha ≥ 6mm²).

• Pa Inverter DC Input (Woswa Wamkulu):

  • Ikani chida chachikulu Chothyola Dc adavotera nthawi 1.2-1.5 kuposa mphamvu yonse yolowera ya inverter.

  • Kugwirizanitsa Kofunika Kwambiri: Khazikitsani nthawi yosweka ya zingwe zosweka (mu bokosi losakaniza) YAIFUPI​ kuposa ya inverter yayikulu Chothyola Dc (monga, 0.1s vs. 0.5s). Izi zimaonetsetsa kuti cholakwika mu chingwe chimodzi chimachotsa chingwe chimenecho chokha, zomwe zimalepheretsa kutseka kwathunthu kwa dongosolo.

3. Zolakwa Zitatu Zapamwamba Zoyenera Kupewa (Kuchokera ku Zomwe Zachitika M'munda)

1. Kugwiritsa ntchito chotsegula chovomerezeka cha 1500V, kunyalanyaza kukwera kwa magetsi otsika kutentha. Izi zitha kuwononga chitetezo cha kutentha.

2. Kunyalanyaza mgwirizanoPakati pa bokosi lophatikiza ndi ma inverter main breakers zimayambitsa kusokonekera kosafunikira kwa gulu lonse.

3. Kusankha njira yolakwika yotetezera(monga, Mtundu B wa machitidwe amalonda) ukhoza kuyambitsa mavuto panthawi yoyambitsa inverter.

4. Kafukufuku: Chomera cha Dzuwa cha 200MW ku Southeast Asia

Tinapereka Zophulitsa dera la DC18 Series(1800V DC, Icu=35kA, Mtundu C curve) pa projekiti ya 200MW ku Thailand, yomwe ikukumana ndi kutentha kwambiri komanso chinyezi. Potsatira mfundo zosankhira ndi kukonza zomwe zafotokozedwa pano, fakitaleyi yakwaniritsa izi. palibe zolakwika zokhudzana ndi DC breaker​ ndipo zidapitilira kugwira ntchito bwino ndi 2%​ patatha chaka chimodzi chogwira ntchito, zomwe zidatsimikizira kudalirika kwa njirayo.

Pezani Dongosolo Losankha Loyenera la Pulojekiti Yanu

Mapulojekiti akunja amasiyana kwambiri malinga ndi nyengo, kapangidwe ka ma module, ndi kukula kwake. Yankho lapadera silikwanira.

Lumikizanani ndi gulu lathu la mainjiniyandi ma specs a module yanu, kasinthidwe ka chingwe, ndi malo a polojekiti yanu. Tidzakupatsani zopangidwa mwaluso Chothyola DC dongosolo lokonzekera​ mkati mwa maola 24, kukuthandizani kuwongolera ndalama, kuonetsetsa kuti chitetezo chili bwino, komanso kukulitsa magwiridwe antchito a polojekiti yanu.