Preliminary Considerations of System-Wide Load Division by Means of Accurate Time Control

Generators and tie lines experience damped natural oscillations in response to load changes or other disturbances. The magnitude and duration of such oscillations is considerable when contemplating system-wide load division by means of accurate time control. A computing servomechanism is considered herein for high-speed resolution of phase angle conditions, whether oscillating or not, into a steady load order proportional to the causative load change. Transfer function analysis is included as an essential step in determination of stability of the proposed control system. Such analysis offers a clear picture of the related performance of computer, governor, penstock, turbine, generator, and tie line.