TCR and TSC thyristor valves for Rowville SVC replacement project

This paper presents the design of the thyristor valves for the Rowville SVC replacement project. The thyristor valves are based on AREVA\´s latest developed S500 series valve design and make use of 8.5kV 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, as well as the valve capabilities to cope with the scenarios like a short circuit fault on the system AC bus and a firing of the TSC valve at the maximum Safe-to-Firing protection level are described. The thyristor valve design satisfies the requirements of the scheme.