Control System Design for Generating Stations

The design of d-c control systems for generating stations built on the unit principle is discussed from the standpoint of segregation, reliability, and continuity. By localization of the d-c control circuit and the use of an interposing 48-volt direct-wire supervisory system, exposure to failure is minimized and provision for local control is retained. This local control permits emergency operation in case there is loss of control panels, circuits, or other central control room equipment.