Load and Voltage Control Algorithms for Grand Coulee Powerplant,

摘要

A load and voltage controller for managing the power output of 26generators and the bus voltages for three high-voltage busses at the Grand Coulee Power Complex is described in detailed flow chart form. The controller is designed for inclusion in a computer-based supervisory control system. The load control is based on a closed-loop digital power controller developed especially for hydroelectric installations. Also included is a unique two-level load allocation system utilizing load-frequency commands from an area automatic generation controller and features an alternating reactive-power balance and voltage-setpoint algorithm. The load and voltage controllers use direct analog signals to the electrohydraulic governors and the thyristor-based excitation systems.