Review of reduction techniques in the determination of composite system adequacy equivalents

Reliability evaluation of a large composite power system involves the consideration of numerous outage events and consequently extensive calculations. Therefore, applying justifiable simplifications such as the determination of an equivalent networks can be very useful in reliability evaluation of large systems. This paper presents a review of procedures which are directly or indirectly applicable to the determination of composite system adequacy equivalents. Following a brief discussion on the basic characteristics of the various methods, their limitations are presented. Concluding points regarding the methods and modeling schemes related to adequacy equivalent are presented at the end of the paper.