Clustered hierarchical control strategy for future power system

The increased grid integration of distributed generation technologies leads to significant structural changes for grid automation and control. There are still no sufficient strategies that are available for active grid integration of distributed generation units and their participation in grid control. New flexible concepts for control of the power system are required to ensure stable and secure operation. Combined with advanced control strategies, distributed generation technologies are effective potential to provide and support secured power supply. This paper introduces a multi-level hierarchical control strategy for efficient grid integration of distributed generation units and especially increases availability and reliability of future power systems. The investigations in this paper concentrate on control concepts of the frequency and the related active power, since the frequency is the ubiquitous grid state variable, representing the balancing of active power generation and consumption. It furthermore paves the way for advanced power system optimization and management functions like virtual power plants, etc.