Urban Astrom

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

This paper presents the current status of the 800 kV UHVDC technology and presents how experience and confidence gained at an 800 kV long term test station is being utilized in executing the 800 kV UHVDC long distance bulk power transmission Xiangjiaba - Shanghai.

800 KV HVDC for Transmission of Large Amount of Power Over Very Long Distances

800 kV HVDC is economically attractive for bulk power transmission of 6000 MW and even 9000 MW per bipole over distances up to 3000 km. With the present progress of R&D converter equipment for 800 kV HVDC will be qualified within short. With proper separation and proper structure of the control and protection and auxiliary systems, the reliability and availability will be as good as, or even better than, for converters at lower voltages.

External insulation design of converter stations for Xiangjiaba-Shanghai ±800 kV UHVDC project

External insulation is one of the critical aspects in the HVDC equipments and converter station design. Especially for UHVDC converter stations, the long creepage and clearance required has significant impact on the equipment and station design. The external insulation design of DC yard, valve hall, and for converter valves is presented. It is the intention of this report to review and summarize the work that has been done and the decisions that have been taken to the benefit of further work and design of new projects.