The Xiangjiaba-Shanghai 800 kV UHVDC project, status and special aspects

Outdoor Insulation and Gas-Insulated Switchgears

“…To reduce Joule losses at longer distances, voltages delivered by generators are increased with step-up power transformers, and electric energy is transported at large voltages [7,8]. Consequently, many ultra/extra AC/DC high-voltage transmission projects have been commissioned or are under construction in many countries: Canada (735 kV), Venezuela (800 kV), China (1100 kV), Japan (1100 kV), and India (1200 kV) [9][10][11][12][13][14][15][16][17][18]. For the power to be delivered to end-users, transmission grids, including towers, conductors, insulators, as well as substations, are essential [19][20][21][22].…”

A Vision of China-Arab Interconnection Transmission Network Planning with UHVDC Technology

“…It is verified that above certain economic distance, the advantages of HVDC would make it the preferred option over AC transmission in the context of point-to-point transmission without intermediate taps, as well as higher cost efficiency and lower power losses [4]. Ultra high-voltage direct current (UHVDC) systems operating at 800kV or above, in particular, are economically attractive for power transmission rated at 5-12 GW [5,6]. In this paper, a general overview of energy resources and power grids in northwest China and Arab Gulf states is depicted including their generation, transmission network, and electricity demand.…”

Reconfiguration algorithm to reduce power losses in offshore HVDC transmission lines

“…Nowadays, there are plans to build offshore wind farms in the middle of the sea with distances greater than 100 km from the coast and therefore from the transport grid with power level between 100 MW up to gigawatts [1].…”