Development of a voltage-dependent stabilizer for a converter dominated distribution grid

Abstract

This paper considers the system stability of a converter dominated distribution grid. Therefore, the destabilizing effect of a converter dominated medium voltage grid has been investigated using simulations. Based on this, a novel voltage-dependent approach has been developed to increase the overall system stability with focus especially on a required damping factor provided by the energy grid. This has been obtained by an enhancement of the converter control structure and an operation point dependent stabilizing factor. In line, the system stability has been improved overall also in manner of its oscillation behavior and robustness.