MICROPROCESSOR ELECTROHYDRAULIC CONTROL SYSTEM WITH MINIMIZED DEAD ZONE OF ROTATIONAL SPEED OF STEAM OR GAS TURBINE

FIELD: power engineering. ^ SUBSTANCE: invention can be used in control systems of powerful steam and gas turbines with use of computer facilities. Proposed control system consists of control part in form of microprocessor controller, intermediate part in form of electromechanical converter and hydraulic operating part with servomotors and intermediate spool. According to invention, to reduce dead zone of hydraulic part, control part of control system is provided with two circuits to form correction signal of common setting of turbine speed and power. In first circuit, signal of unbalance of preset and current values of summary displacement at servomotor output is passed through P1 converter before delivery into second circuit. The same operation is carried out for unbalance signal of preset and current values of displacement of intermediate spool. ^ EFFECT: improved quality of control of microprocessor electrohydraulic system of stem or gas turbine owing to reduction of dead zone of servo motors of hydraulic part of system. ^ 2 cl, 1 dwg