On-line Locating of Generator Trips in Large Power Systems


  • Jerneja Bogovic
  • Urban Rudez
  • Rafael Mihalic


Power system is a giant dynamic system. It consists of numerous generation units, transmission lines and loads. Each sudden change influences both voltage and frequency conditions. Impact intensity of such events depends on power-system operating conditions at that time and specifics of an involved power-system element. Normally the most critical event represents an unscheduled outage of a major element following a fault. It is of crucial importance for a system operator to detect and evaluate the “danger” of such events as soon as possible in order to keep the operational security of a power system at a high level by taking suitable emergency actions. One of the most important information for the operator is the location of an event origin and in case of cascaded events the corresponding time sequence of all other events that follow.
This paper describes different methods for on-line locating of generator trips in large power systems. The first and most significant step for on-line locating of generator trips is detection of it. The next step is time delay detection, observed from frequency, for which several different approaches can be used. The last step is locating of generator. In this paper two different methods are presented, the first method is multilateration and the second method is gradient search method. Their applications are demonstrated on a real case from ENTSO-E network. Results of both methods are compared.


Disturbance detection; Multilateration; Time delay detection

Published Online


How to Cite

Bogovic, J., Rudez, U., Mihalic, R. “On-line Locating of Generator Trips in Large Power Systems”, Periodica Polytechnica Electrical Engineering and Computer Science, 59(3), pp. 84–87, 2015. https://doi.org/10.3311/PPee.8572