Petar Hemon - Energoinvest El Yugoslavia

The Report describes the advantages and shortages of the interconnection of various power systems, especially if it concerns Tie line.The Report itself also points out the influence of load shedding. system protection to the system stability in the cases when interconnection is off. The criteria for choice of underfrequency protection is also analysed,as well as the number of undeppequency levels and worldwide xperiences.