INTEGRATING TRANSMISSION INTO IRP .1. ANALYTICAL APPROACH

This is Part I of a two paper set dealing with transmission and integrated resource planning. The primary objective of this paper is to report a framework to bring transmission and selected other resources into the sphere of integrated resource planning. Transmission lines and related equipment are indeed a resource, and may constitute either a substitute for other resources (e.g., a strengthened transmission network may reduce the need for remote generation) or a complement to other resources (e.g., additional transmission investment may be needed to facilitate power purchases from a neighboring system or an independent power producer). Moreover, growing competitive pressures make it necessary to plan transmission systems to facilitate competition among alternative generation and demand-side resources. A combined transmission and integrated resource planning model, called the Comprehensive Electrical Systems Planning Model (CESPLAN), is described in this paper. Part II reports some case study results designed to illustrate the model's features.