Redesigning generation control in power systems: Methodology, stability and delay robustness

In this paper, we propose modifications in the generation control in power systems to improve the economic efficiency, stability and robustness of generator regulation in real time. We first present the state-space description of a conventional power network model describing system dynamics around a nominal operating condition. We then formulate an optimization problem describing system regulation under exogenous disturbances, following which the redesign methodology is presented. The optimality, stability and delay robustness of the redesigned dynamics are studied, where we also introduce controllable loads. The performance of the redesigned control scheme is illustrated by numerical examples.