Electric power substation capital costs Page: 4 of 52
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The displacement or deferral of substation equipment is a key benefit associated with
several technologies that are being developed with the support of the U.S. Department of
Energy's Office of Utility Technologies. This could occur, for example, as a result of installing a
distributed generating resource within an electricity distribution system.
The objective of this study was to develop a model for preparing preliminary estimates of
substation capital costs based on rudimentary conceptual design information. The model is
intended to be used by energy systems analysts who need "ballpark" substation cost estimates to
help establish the value of advanced utility technologies that result in the deferral or
displacement of substation equipment. This cost-estimating model requires only minimal inputs.
More detailed cost-estimating approaches are recommended when more detailed design
information is available.
The model was developed by collecting and evaluating approximately 20 sets of
substation design and cost data from about 10 U.S. sources, including federal power marketing
agencies and private and public electric utilities. The model is principally based on data
provided by one of these sources. Estimates prepared with the model were compared with
estimated and actual costs for the data sets received from the other utilities. In general, good
agreement (for conceptual level estimating) was found between estimates prepared with the cost-
estimating model and those prepared by the individual utilities. Thus, the model was judged to
be adequate for making preliminary estimates of typical substation costs for U.S. utilities.
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Dagle, J. E. & Brown, D. R. Electric power substation capital costs, report, December 1997; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc699320/m1/4/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.