Author(s)

Kadri Kadriu, Ali Gashi, Ibrahim Gashi, Ali Hamiti, Gazmend Kabashi

Faculty of Electric Engineering and Computer Sciences, University of Prishtina, Prishtina, Kosovo.
KOSTT—Kosovo Transmission System and Market Operator, Prishtina, Kosovo.

This paper analyses the synchronization problem of a generator onto power system without satisfying synchronization condition. The main focus of the paper is on the impact of the dc component of the current in the high voltage circuit breaker during its close-open operating cycle. Using real time measurements of currents/voltages and angles during the close-opening cycle of high voltage generator circuit breaker and the impact of the dc component of current in context of interrupting large magnitude of current from the circuit breaker. In addition, the paper describes a study case model and the results of simulations performed using the software EMTP-ATP of an actual incident that occurred during the inadvertent synchronization of a large 339 MW, 24 kV generator to the grid.

High Voltage Generator Circuit Breaker; dc Component of Current; Asynchronous Connection; Delay Current Zero

K. Kadriu, A. Gashi, I. Gashi, A. Hamiti and G. Kabashi, "Influence of dc Component during Inadvertent Operation of the High Voltage Generator Circuit Breaker during Mis-Synchronization," Energy and Power Engineering, Vol. 5 No. 3, 2013, pp. 225-235. doi: 10.4236/epe.2013.53022.