Thyristor Valve for the 12-Pulse converter for Sino-Russia BtB Scheme

This paper presents the design of the thyristor valve for the 750 MW Sino-Russia Back-to-Back HVDC scheme. The thyristor valves are based on AREVA\´s H400 series valve design and make use of Eupec 8.5 kV 5" electrically-triggered thyristor technology. Details of the valve configuration, the cooling circuit, as well as the protective strategy are presented. Detailed electrical ratings such as the steady-state and temporary overload capabilities, the fault current capability, the valve losses, as well as the valve capabilities to cope with the fault scenarios such as the loss of ac voltage are described. The thyristor valve design satisfies the requirements of the scheme.