eliability Assassment of Selected Fossil Fuel Operated Power Stations in Nigeria

As the gap between supply and demand on electric energy widens in Nigeria, it becomes necessary to assess the
performance of fossil fueled generator turbine that dominates the electric power industry. Consequently, this
study is to evaluate the historical performance data of four selected powerstations within Nigeria from 2002 to
2014, so as to ascertain if they are supplying electric energy within their installed capacities in line with global
best practices. The combined installed capacity of these four selected power plant is 35% of the twenty-one
thermal power plants connected to the national power grid. A historical operational data of these selected
plants covering a period of thirteen years was obtained and analysed based on power plant performance
indices analytical techniques. Results obtained from these analysis shows that, the equivalent availability
factor which is accepted as the relative index of equipment reliability in this study, for Afam I-V, Afam VI, Delta
and Egbin are 21.89%, 76.15%, 39.14% and 71.75% respectively. The analysis also reveals the Afam VI and
Egbin power stations have an effective preventive maintenance programmes that promotes availability of their
generatorswhereas, Afam I-V and Delta power stations werealways overwhelmed withcorrective maintenance