Economic benefits and strategic new international transmission in the Southern African power pool (SAPP) and West African power pool (WAPP)

This work discusses the Purdue long-term expansion model (LTEM), which is used in both the SAPP and WAPP policy planning. This policy is a 20-year planning system for energy and reserve trade between countries, which minimizes the present value of electricity generation costs, and generation/transmission capacity expansion costs. Modeling demonstrations consistently indicate the importance of several particular international transmission lines in Africa. Also expansions on existing lines and the addition of new proposed lines are indicated as providing the most cost effective investments for improving reliability of supplies across Africa.