Agent-based redispatch for real-time overload relief in electrical transmission systems

Increasing uncertainties in power system operation require novel approaches for utilizing operational flexibility to enable a both secure and efficient power supply. This paper presents a real-time coordination approach for adaptive redispatch of generation and load in case of overloads in the electrical transmission network. For this, a previously developed multi-agent system for coordinating power flow controlling devices is extended by novel agent behaviors enabling a distributed decision making on adequate redispatch. Main features of the approach are its real-time adaptivity to unforeseen network conditions (e.g., (N-k)-cases) and its automated deployment of the controllability of future smart grids. By this, storages, demand side management and distributed generation in the distribution grid can support operational security of the transmission network in alert or emergency network conditions. Provision of such remedial actions is also of economic value as it enables a less constrained system operation due to the ability to meet uncertainties by flexibility. The applicability of the approach is demonstrated in a co-simulation of the MAS and a dynamic power system simulation.