The 230-kv ring bus for grand coulee power plant

Grand coulee power plant at coulee dam, Wash., is the largest hydroelectric power plant in the world and will have an ultimate installed capacity of over 2.3 million kw. This unprecedented concentration of generating capacity presents a real and worthwhile problem regarding the selection, design, and development of the most desirable bussing arrangement. It was concluded early in the studies of the various possible bussing arrangements that the three performance factors which should be given major consideration were: (a). Circuit-breaker interrupting capacity. (b). Stability. (c). Ease of operation and flexibility.