Comparison of two algorithms for power system reliability calculations

In this paper, two algorithms are proposed for the computation of the static generation reliability of a power system. The loss-of-load probability (LOLP), which is the reliability index usually employed in static generation reliability evaluation, is computed by using both the capacity outage table and effective load approaches. Numerical results obtained from the study of a sample power system consisting of 44 generating units are compared in terms of the required computational time and numerical accuracy. It is found that, with the generating capacities properly rounded off, the capacity outage table method can be employed as an effective means of computing power system reliability. The effect of generation expansion planning on generation reliability is also examined.