Frequency control of load swings

The Consolidated Edison Company made a series of tests to determine the cause and extent of system load swings on generators and tie feeders. The results were reported in detail in a previous paper.¹ An analysis of these tests indicated ways in which our load dispatching methods could be improved. This paper reports the effect of the changes in the method. Our experience indicates that the operators may reduce tie and generator load swings to negligible values by using frequency to control manual adjustments of generator output, provided that an accurate frequency indication is available at each generating station.