Braking resistor as a smart-grid technology

The requirements in the grid codes are sharpened with every new release, forcing even small generating units to participate in stabilizing the electrical system. In combination with the increased penetration of renewable energy sources, high dynamic processes have to be withstood. To cope with these demands this paper introduces a resistor based out-of-step protection system for a smart-grid. A system based on this concept does not only increase the critical fault clearing time but also, of triggered smartly, speeds up and limits transients. Therefore this paper analyses the optimal resistance and the effect on the electrical moment. Additionally the sensitivity to the short circuit power of an electrical grid and the acceleration constant is evaluated. The results show the advantages and chances of this concept in a highly dynamic smart-grid.