Roles of node dynamics and data network structure on cooperative secondary control of distributed power grids

In this paper we study stability of a power system consisting distributed generation units. A complete model for the power grid including dynamics of loads as well as interchange of power is taken into account. A cooperative secondary control scheme takes into account internal dynamic of each node and is implemented to improve the stability of the system. In this paper, a condition for the stability of power grid in the presence of communication network is achieved. We support the results by numerical simulations on various connection topologies including scale-free and random structures. We find that increasing the number of communication links does not generally improve the stability of the whole power network.