Ngokombono wezobuchwepheshe, ukwamukela ukudluliselwa kwe-±800 kV UHV DC, iphakathi komugqa akudingeki ukuthi kuwiswe iphuzu, okungathumela inani elikhulu lamandla ngqo esikhungweni esikhulu somthwalo; esimweni sokudluliselwa kwe-AC/DC okuhambisanayo, kungasebenzisa ukuguqulwa kwemvamisa yamabili ukuvimbela ngempumelelo ukunyakaza kwemvamisa ephansi yesifunda, futhi kuthuthukiswe umkhawulo wokuqina kwesikhashana (okuguquguqukayo) kwesigaba esiphambene; futhi kuxazululwe inkinga yokudlula ugesi we-short-circuit wengxenye enkulu yokwamukela yegridi yamandla. Ukwamukela ukudluliselwa kwe-AC kwe-1000kV, iphakathi lingawiswa ngomsebenzi wegridi; kuqiniswe igridi ukuze kusekelwe ukudluliselwa kwamandla kwe-DC okukhulu; ngokuyisisekelo ukuxazulula izinkinga zogesi we-short-circuit odlula izinga legridi enkulu yokwamukela kanye nomthamo wokudlulisa ophansi womugqa we-500kV, kanye nokwenza ngcono isakhiwo segridi yamandla.
Ngokuphathelene nomthamo wokudlulisa kanye nokusebenza kokuqina, kusetshenziswa ukudluliselwa kwe-±800 kV UHV DC, ukuzinza kokudlulisa kuncike ku-effective short circuit ratio (ESCR) kanye ne-effective inertia constant (Hdc) yegridi ekugcineni kokwamukela, kanye nesakhiwo segridi ekugcineni kokuthumela. Uma kusetshenziswa ukudluliselwa kwe-AC okungu-1000 kV, umthamo wokudlulisa uncike kumthamo we-short-circuit wephuzu ngalinye lokusekela lomugqa kanye nebanga lomugqa wokudlulisa (ibanga eliphakathi kwamaphoyinti okwehla eziteshini ezimbili eziseduze); ukuzinza kokudlulisa (umthamo wokuvumelanisa) kuncike kubukhulu be-engeli yamandla endaweni yokusebenza (umehluko phakathi kwama-engeli wamandla emaphethelweni amabili omugqa).
Ngokombono wezinkinga zobuchwepheshe ezibalulekile ezidinga ukunakwa, ukusetshenziswa kokudluliselwa kwe-±800 kV UHV DC kufanele kugxile ebhalansini yamandla asabelayo aqhubekayo kanye nokusekelwa kwamandla asabelayo okuguquguqukayo kanye nokuzinza kwe-voltage kwengxenye yokwamukela yegridi, futhi kufanele kugxile ezinkingeni zokuphepha kwe-voltage yesistimu okubangelwa ukwehluleka ngasikhathi sinye kokushintsha kwesigaba ohlelweni lwe-DC feeder olunamaconsi amaningi. Ukusetshenziswa kokudluliselwa kwe-AC kwe-1000 kV kufanele kuqaphele izinkinga zokulungiswa kwesigaba sesistimu ye-AC kanye nokulawulwa kwe-voltage lapho imodi yokusebenza ishintshwa; ukunaka izinkinga ezifana nokudluliselwa kwamandla aphezulu ezingxenyeni ezibuthakathaka ngaphansi kwezimo ezimbi zamaphutha; kanye nokunaka izingozi ezifihliwe zezingozi zokucima kombane endaweni enkulu kanye nezinyathelo zazo zokuvimbela.
Isikhathi sokuthunyelwe: Okthoba-16-2023