ABSTRACT
This work analysed the current state of power system in Nigeria with emphasis on distribution system using Akwa Ibom Distribution System as a case study. The components of the study system were analyzed. This work adopted the analytical and simulation approach to reliability and stability assessment. Analysing the system the way it is shows that the system was not reliable and stable. The outcome gotten from the base state of the system confirmed this. The results for the current state of the system showed high values for System Average Interruption Frequency Index (SAIFI) (2.8879 fr/syst.cust.), SAIDI (16.7877 hr/syst.cust) and CAIDI (9.1770 hr/cust.), ENS (20,430 kWhr). Improvement with breaker in the 33kv feeders presented a better set of indices than the Base Case indices while combination with hydro power plant presented the best set of indices: (SAIFI) (1.0987 fr/syst.cust.), SAIDI (7.4205 hr/syst.cust) and CAIDI (3.7721 hr/cust.), ENS (7,746kWhr). In conclusion, including various breakers, relays, isolators and hydro power plant to the Akwa Ibom state distribution system will improve the outage thereby serving as a panacea to power stability in Nigeria.
