Ngokwembono yobuchwephesha, ukwamkela uthumelo lwe-±800 kV UHV DC, umbindi womgca awudingi ukuwisa inqaku, elinokuthumela amandla amaninzi ngqo kwiziko elikhulu lomthwalo; kwimeko yothumelo oluhambelanayo lwe-AC/DC, ingasebenzisa i-bilateral frequency modulation ukuthintela ngokufanelekileyo i-regional low-frequency oscillation, kwaye iphucule umda wozinzo lwexeshana (oluguquguqukayo) lwe-cross-section; kwaye isombulule ingxaki yokudlula umbane we-short-circuit wesiphelo esikhulu sokwamkela igridi yamandla. Ukwamkela uthumelo lwe-AC lwe-1000kV, umbindi ungawiswa ngomsebenzi wegridi; ukuqinisa igridi ukuxhasa uthumelo lwamandla e-DC olukhulu; ngokusisiseko ukusombulula iingxaki zombane we-short-circuit odlula umgangatho wegridi enkulu yokwamkela kunye nomthamo wothumelo ophantsi womgca we-500kV, kunye nokwenza ngcono ulwakhiwo lwegridi yamandla.
Ngokuphathelele umthamo wothumelo kunye nokusebenza kozinzo, kusetyenziswa uthumelo lwe-±800 kV UHV DC, uzinzo lothumelo luxhomekeke kwi-effective short circuit ratio (ESCR) kunye ne-effective inertia constant (Hdc) yegridi kwisiphelo sokwamkela, kunye nolwakhiwo lwegridi kwisiphelo sokuthumela. Ukwamkela uthumelo lwe-1000 kV AC, umthamo wothumelo uxhomekeke kumthamo we-short-circuit wenqaku ngalinye lokuxhasa lomgca kunye nomgama womgca wothumelo (umgama phakathi kwamanqaku okuwisa eziteshini ezimbini ezikufutshane); uzinzo lothumelo (umthamo wokuvumelanisa) luxhomekeke kubukhulu be-engile yamandla kwindawo yokusebenza (umahluko phakathi kwee-engile zamandla kwisiphelo somgca ezimbini).
Ngokwembono yemiba ephambili yobuchwephesha efuna ingqwalasela, ukusetyenziswa kothumelo lwe-±800 kV UHV DC kufuneka kugxile kwibhalansi yamandla asabelayo azinzileyo kunye ne-dynamic reactive power backup kunye nokuzinza kothumelo lwe-voltage yesiphelo sokwamkela segridi, kwaye kufuneka kugxile kwimiba yokhuseleko lothumelo lwe-voltage yenkqubo ebangelwa kukusilela ngaxeshanye kokutshintsha kwesigaba kwinkqubo ye-DC feeder ene-multi-drop. Ukusetyenziswa kothumelo lwe-1000 kV AC kufuneka kunikelwe ingqalelo kwiingxaki zohlengahlengiso lwesigaba se-AC kunye nolawulo lothumelo xa imo yokusebenza itshintshiwe; kunikelwe ingqalelo kwiingxaki ezinje ngokudluliselwa kwamandla aphezulu kwiindawo ezibuthathaka phantsi kweemeko ezinzima zempazamo; kwaye kunikelwe ingqalelo kwiingozi ezifihlakeleyo zeengozi zokucima kombane kwindawo enkulu kunye namanyathelo azo okuthintela.
Ixesha lokuthumela: Okthobha-16-2023