Automatic and Supervisory Control of the Calgary Power Ltd. Hydroelectric System-Some Design Features [includes discussion]

Part of an interconnected power system with a total capacity of 281 megawatts in ten hydro and six steamgenerating plants, Calgary Power Ltd. operates eight hydro plants totalling 156 megawatts and a steam plant of 10 megawatts. Calgary Power Ltd. plans centralized control of the eight existing hydro plants and the transformer and switching stations on its main 138-kv transmission system. Six of the plants and their substations are now in operation as unattended plants controlled from a central dispatching station. Representing almost two-thirds of the company's generating capacity, they range in size from 4 to 50 megawatts. A 30-megawatt and a 20- megawatt plant are in process of conversion to remote operation.