ELECTRIC GOVERNOR OF HYDRAULIC TURBINE GENERATOR

摘要

PURPOSE:To make a smooth and stable control by providing a switch permitting circuit which supervises output signals of arithmetic units whose gains or/and time constants are different, along with an instruction signal for changing extraneous conditions. CONSTITUTION:Until elastically restorative arithmetic units 32, 34 wherein gains or/and time constants are set different generate signals for providing a trigger to produce an output signal to a servo motor driving circuit, the output signals of the arithmetic units 32, 34 are processed while passing through the following circuits to an adder 36. After receiving an output signal from an integrator 40, the arithmetic units 32, 34 send arithmetic output signals to a switch permitting circuit 42. Simultaneously, an instruction signal is fed from an external condition changing instructive circuit 44 to the circuit 42 to supervise said output signals of the arithmetic units 32, 34 for preventing a creation of a reverse control feature in a control signal which is supplied to an amplifier 38 and the arithmetic unit 40 successively at a timing when those output signals from the units 32, 34 are made equal.