초록 ▼

A control circuit is described for sensing and correcting deviations in speed of a turbine-generator. The control circuit compares actual turbine speed with a speed reference signal and provides a non-linear speed control signal to the turbine. The non-linear speed control signal is characterized by

A control circuit is described for sensing and correcting deviations in speed of a turbine-generator. The control circuit compares actual turbine speed with a speed reference signal and provides a non-linear speed control signal to the turbine. The non-linear speed control signal is characterized by a first substantially constant slope for deviations in speed below a preselected deviation and a second substantially greater slope for deviations in speed above the preselected deviation. Substantially improved power system frequency regulation is thereby maintained.

대표청구항 ▼

In a turbine-generator control system having means to control fuel flow to the turbine in accordance with an electrical fuel command signal, a non-linear droop control circuit comprising: means for obtaining a difference signal proportional to the difference between a reference signal proportional t

In a turbine-generator control system having means to control fuel flow to the turbine in accordance with an electrical fuel command signal, a non-linear droop control circuit comprising: means for obtaining a difference signal proportional to the difference between a reference signal proportional to synchronous speed and a signal proportional to the actual turbine speed; limiter means responsive to said difference signal for providing an output signal proportional to said difference signal below a preselected threshold and a magnitude limited signal above said preselected threshold; and first summing amplifier means for summing said difference signal and the output signal from said limiter means; second summing amplifier means for summing the output of said first summing amplifier and said signal proportional to actual turbine speed for providing said command signal, said command signal enabling fuel flow at a faster rate for an output signal above said threshold than for an output signal below said threshold.