Digital analog electrohydraulic turbine control system

摘要: An electrohydraulic control system for a steam turbine has valve actuators with analog position set points or reference values supplied by main loop digital computer. The computer performs complex calculations to obtain the in accordance operating parameters of and desired operational modes. A standby furnishes simple speed load function event loss signals. When mode, provides safety backup through ''''dead band'''' which closing signals upon excessive speed. In signal representing most recent point is from memory unit constantly updated