Investigation of impacts on the disturbance propagation in power systems

Disturbances as generation trips, load shedding or other switching events propagate measurably throughout power systems as electromechanical interactions and may cause undesirable phenomena as power oscillations. Therefore, it is essential to have a deeper understanding of the electromechanical phenomenon to improve current countermeasures. For this reason, the present study analyzes the impacts on the disturbance propagation speed as line, generator and operating parameters, by means of an exemplary power system model and numerical simulation. The used conventional speed determination method is presented and discussed with regard to further development. By varying each of the selected system parameters, the sensitive influence on the propagation speed is studied and compared to the theoretical expectations. Additionally, the impact of different incident locations in a power system is investigated to determine the influence of system structure on the propagation.