There is an alternative approach to designing and constructing standard substations called the "Modular Substation" approach. Modular substations have been around for some time, but recently we have heard more news about this approach. One reason for this is that the modular substation approach makes it more cost effective and more appealing now when compared with traditional substation construction. Recent improvements in substation equipment technology and cost efficiencies in installation and energizing of a modular substation make it more popular than a traditional substation. Some utilities have benefited from the short time commissioning and flexibility that the modular substation approach offers in site selection.
A typical modular substation consists of pre-assembled equipment installed on steel framing, pre-wired and tested before delivery to the site. The module then would be installed on the customer's pier foundations. This approach has resulted in significant savings on site work, construction and commissioning time. Completion time for a modular substation usually is half of the time that is required to complete traditional substation construction.
Modular substation design uses a broad range of applications and provides installation flexibility, allowing it to be tailored to the utility's requirements and commissioned within a short time frame. The modular substation is an ideal solution for additions or replacement of existing substation.
Many of industry's leaders in the substation business are now providing modular substation fabrication and installations.
Please consult with your General Field Representative to discuss special modular substation bidding and contracting.
If you would like more information or have any questions, please contact Theodore V. Pejman, Electrical Engineer, Transmission Branch, at 202-720-0999 or at tpejman@rus.usda.gov.