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Power substations and their distribution systems have to be not only efficient, but safe, visually pleasing, and designed for long-term carrying capacity as well.

Challenge

The University needed to increase capacity to the North Campus comprising several biotech buildings and the hospital. This involved taking two 46kV services from Tucson Electric Power to serve two new 30MVA power transformers and distributing new 13.8kV high capacity underground services to the buildings, as well as to the hospital chiller/boiler plant and another chiller plant. The project also included converting an existing radial feeder to a loop to enhance service reliability to campus critical buildings, removing significant load from the fully loaded Main Campus substation, and reconfiguring the T-60 gas turbine generator output to operate in parallel with TEP.

Solution

We designed the new substation in a smaller footprint and with a lower profile than the previous TEP substation, resulting in a less obtrusive visual impact on campus and adjacent neighborhoods and more efficient use of valuable property. The substation components are fully enclosed resulting in a safer installation. More than 30,000 feet of underground ducts were installed throughout the North Campus.

Role: Engineer of Record
Size: 46KV
Cost: $14M
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