Abstract
Whether a distribution system component serves two customers or thousands,
understanding the diversity of customer loads at that level of the distribution
system is critical. While many traditional formulas for sizing distribution
components rely primarily on peak loads, consideration of the overall load
shape and customer diversity can enable planners to optimize equipment sizing.
This report addresses the use of load research and energy billing data to
properly design distribution system components, and includes examples of
applying load research data for evaluating and sizing transformers. We begin by
looking at the individual transformer level and then build up to the
distribution substation.