Abstract:
Security assessment is a term used to describe the process of ensuring system operating security. This thesis discussed the security of the power system for the purpose of maintaining the continuity of power flow from the station to the consumer within rated values whatever the circumstances of generation station. The main objective of this thesis is to study the security assessment indices of power systems in general, and then the study is to investigate the security assessment of the national grid of Sudan as case study.
In this thesis, performance indices used in the contingency selection of the system were discussed, and applied to the national grid of Sudan system under different scenarios. According to these scenarios the most risky case has been discovered. The national grid of Sudan which consists of 191-bus system has been taken as case study. By comparison between the normal load flow and the load flow after the outage of some transmission line, it has been found that the outage of the main transmission line between Khartoum and Merowe leads to total blackout. From this thesis it can be concluded that ETAP software is of high efficiency, simple, and can be run by any personal computer. Also it has been considered the best option to solve the problem in question.
