Dynamic distribution grid management through the coordination of decentralized power units

Coordination of ancillary services provided by decentralized power units has become one of the main grid operation challenges because system service responsibilities are increasingly being shifted to medium- and low-voltage networks. This paper describes an implementation method of considered control algorithms on real power units in German medium-voltage systems in order to maintain the distribution node voltages within the allowable range. The algorithms adjust active as well as reactive power set points, taking into account sensitivity matrices of critical nodes to ensure voltage stability at any time and in any system state. The remote control of the considered electrical system is designed according to the approved smart grid communication standards. Taking into account the electrical limitations of the considered power units selected cases are validated by load flow calculations in order to demonstrate the technical feasibility of the algorithms and their supporting effect on the distribution grid.