Computerized economic analysis of alternative line designs a “how to” approach for quick solutions

This paper presents an argument for performing economic conductor analysis during utility planning, and presents an approach to developing relatively simple software which can be used to efficiently evaluate alternative conductor sizes and construction types for new or rebuilt lines including a no action alternative. The paper will describe how multiple variable inputs into the software will allow for alternatives to have different initial costs, variations in future operation and maintenance expenses and different levels of future loss costs. The body of the paper will describe how such a tool can allow an end user to quickly and efficiently evaluate different conductor sizes, changes in number of phases, different types of line construction (i.e., underground versus overhead) as well as evaluating ldquowhat ifrdquo cases using different purchased power cost and maintenance escalation rates. It will also discuss how a user might choose to report the results using a simplified single result, matrix or visual comparison. The paper will conclude by illustrating how this or similar types of software can expedite complex engineering and economic evaluations to assist management in making decisions regarding system improvements.