A new approach to evaluate two area interconnected power generating systems reliability

Abstract

This paper presents the developed application of a new approach to evaluate Loss of Load Probability (LOLP) of two area interconnected power systems consisting of different types and sizes of generating units considering independent as well as correlated system demands. This approach uses hourly loads, or any suitable time interval for system demand, for a given period. The Probability Density Function (p.d.f.) of equivalent load is obtained by convolving the p.d.f. of generating unit outages with the p.d.f. of system demands using a new approach. The proposed approach can simulate multistate representation of generating units as well. The LOLP values for each system are obtained from the p.d.f. of equivalent load. This method is applied to two interconnected systems and the results obtained are compared with those obtained using existing methods. It is found that this approach is efficient, exact and easy to apply compared with other methods.