Abstract
This paper deals with some aspects of automatic generation control of a two-area mixed hydro-thermal electric power system. The linear discrete time state space model with a thermal unit and a hydro unit per area, is used. The speed governor deadband and the generator rate constraints are being taken into consideration. Automatic Generation Control (AGC) of hydro units equipped with classical generation controllers is used for load change regulations from moment to moment. Discrete mode optimisation of such controllers using Integral Squared Error (ISE) concepts have been attempted. While AGC of thermal units equipped with self-tuning predictors is for regulations of sustained load changes.
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