Izindaba

I. Isingeniso: Isidingo Esiphuthumayo Sokuvikelwa Ezimweni ze-DC Ezine-High Voltage kanye Nenani Eliyinhloko Le-DC Isolation Switch

Ngokuthuthuka okusheshayo kwamandla amasha, izinhlelo ze-DC (HVDC) ezinama-voltage aphezulu zisetshenziswa kabanzi ku-photovoltaic (PV), isitoreji samandla kanye nokuhamba ngesitimela. Ukusebenza kwazo okuphephile kubalulekile, njengoba isiqondiso samanje se-HVDC esiqinile kanye nokuntuleka kokuwela okungokwemvelo kwenza ukuvikela ukuhlukanisa kanye namaphutha kube yinselele. Ngakho-ke imishini yokuhlukanisa esebenza kahle nethembekile ibalulekile.

Njengedivayisi yokuvikela i-HVDC ebalulekile,Iswishi Yokwahlukanisa ye-DC(i-DC disconnect switch) ihlukanisa amasekethe ngokomzimba, inqume amaphutha, futhi iqinisekise ukuphepha. Ngokungafani namaswishi e-AC, yenzelwe ngokukhethekile ama-arc e-DC anzima ukuwacisha, futhi ukusebenza kwayo ngaphansi kwe-voltage ephezulu kunquma ngqo amazinga okuvikela uhlelo.

Lesi sihloko sichaza kabanzi nge-Iswishi Yokwahlukanisa ye-DCukusebenza nokuthembeka kwe-'s, ihlaziya inani layo eliyinhloko ekuvikelweni kwe-HVDC ukuze iqondise ukukhethwa kohlelo lokusebenza.

II. Ukuphumelela Kokusebenza: Ukuzivumelanisa Nezimo Ezinamandla Aphezulu

Izimo ze-HVDC zidinga ukusebenza kahle kweswishi yokuhlukanisa ephezulu, okuhlanganisa ukubekezelelana kwe-voltage ephezulu kanye nokucindezela okusebenzayo kwe-arc. I-DC Isolation Switch ifinyelela impumelelo ephindwe kabili ukuze ihlangabezane nalezi zidingo.

Ekubekezeleleni amandla aphezulu kagesi, isizukulwane esisha sinokuthuthukiswa kwesakhiwo nezinto, okuvumelana ne-1500VDC nangaphansi (nangaphezulu kwamaphrojekthi akhethekile). Ukufakwa kokushisa okunamandla aphezulu kanye nokuxhumana okulungiselelwe kuvimbela ukuwohloka. Ngokusho "Kwezindinganiso Ezikhethekile Nezidingo Zesitifiketi Sezinguquko Zokuhlukaniswa Kwe-DC Zezicelo Ze-Photovoltaic", izinkinobho ezihambisana ne-IEC 60947-3 zisebenza kahle kumandla kagesi alinganisiwe, kanye nokwenyuka kwezinga lokushisa lomqhubi wethusi ≤60K.

Ukuze kusebenze kahle ngokuphula, ukucisha i-arc-ctinguishing okuthuthukisiwe kwe-magnetic blow kanye nokuphula ama-point amaningi kucindezela ngokushesha ama-arc e-DC (angenayo i-zero-crossing yemvelo). Isibonelo, ama-switch ochungechunge lwe-ABB Emax afinyelela ukuphuka okuphephile okungu-1500V DC / 100kA, okugwema amaphutha.

Lokhu kuthuthukiswa kwephula imikhawulo yendabuko yokushintsha, okuqinisekisa ukusebenza okuphephile kwamaphrojekthi e-HVDC.

III. Ukuthuthukiswa Kokwethembeka: Ukuzinza Kwesikhathi Eside

Ngale kokusebenza kahle, i-DC Isolation Switch entsha ithuthukisa ukuthembeka, ixazulula impilo yesevisi emfushane kanye nezinkinga zokunakekelwa okuphezulu ezimweni ezinzima.

Oxhumana nabo abaguga kakhulu kanye nokudluliselwa okulungiselelwe kwandisa impilo yomshini kuze kube yimisebenzi engaphezu kwe-10,000, kunciphisa ukulungiswa kanye nezindleko—kufanelekile kumaphrojekthi amakhulu e-PV kanye nokugcina amandla.

Ngokuvikelwa kwe-IP66, imelana namazinga okushisa aphezulu (-40℃ kuya ku-85℃), umswakama kanye nesifutho sikasawoti, okuqinisekisa ukusebenza okuzinzile kwangaphandle/kwezimboni.

Iphinde ihlangabezane nezindinganiso ze-IEC 60947-3 kanye ne-GB/T 14048.3, iqinisekisa ukuphepha kanye nokuthobela imithetho.

IV. Ukuzivumelanisa Nesimo Esigcwele

Ngokuthuthuka okubili, i-DC Isolation Switch isetshenziswa kabanzi emasimini e-HVDC ayinhloko: izinhlangothi ze-DC zesitshalo se-PV (ukuhlukaniswa ngesikhathi sokulungiswa), izinhlelo zokugcina amandla (ukuhlukaniswa kwebhethri-i-converter), kanye nezinsiza zikagesi ze-DC zokuhamba ngesitimela/zezimboni (ukusika amaphutha).

V. Izinkomba

1. “Izindinganiso Ezikhethekile Nezidingo Zesitifiketi Sezinguquko Zokwahlukaniswa Kwe-DC Zezicelo Ze-Photovoltaic” — I-China Electrical Equipment Industry Association

2. I-IEC 60947-3 Standard: Iswishi ye-voltage ephansi kanye negiya lokulawula — Ingxenye 3

3. Incwadi Yomkhiqizo Wokushintsha Ukushintsha Uchungechunge lwe-DC Isolation Series ABB Emax

VI. Imibuzo Evame Ukubuzwa

Umbuzo 1: Uyini umehluko omkhulu phakathi kokushintsha kwe-DC kanye ne-AC isolation? A1: Ama-DC switch asebenzisa i-arc-extinguishing ekhethekile (isb., i-magnetic blow) kuma-DC arc aqinile; ama-AC switch athembele ku-AC arc zero-crossing.

Umbuzo 2: Yimaphi amazinga kagesi engakwazi ukuzivumelanisa nawo? A2: 1500VDC nangaphansi; eminye imikhiqizo isekela amazinga aphezulu kumaphrojekthi akhethekile.

Q3: Ungaqinisekisa kanjani ukuthembeka ezindaweni ezinzima? A3: Ukuvikelwa kwe-IP66, izinto ezingagqwali kanye nesakhiwo esilungiselelwe ukumelana nezimo ezimbi kakhulu.