An internal model approach to (optimal) frequency regulation in power grids

This paper studies the problem of frequency regulation in power grids under unknown and possible timevarying load changes, while minimizing the generation costs in some particular cases. We formulate this problem as an optimal output agreement problem for distribution networks. This problem has been recently addressed by some of the authors using incremental passivity and dynamic internal-model-based controllers. We believe that this framework is general enough to allow for more complex control scenarios in future extensions.