System Control Aided by Governor Transducer

A new means for regulating the output of hydroelectric generators by continuous-type electric control signals has recently been developed and tested. It consists of an electrohydraulic servo which is connected to the governor speed-adjusting mechanism through a lever system, and a magnetic amplifier which amplifies the control signal and feeds it to the servo. The whole assembly is called a governor loadcontrol auxiliary and the electrohydraulic servo is called a speed-setting transducer. Tests show that substantial improvement in system load-frequency regulation can be obtained through the use of this new means of control.