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ED5-PVH project ties to SRP’s completed transmission line

by Jen Neville

 Substation steel equipment

As the sun sets in Pinal County, Arizona, the nearly completed ED5 Substation lights begin to turn on. (Photo by Todd Rhoades)

Visit Western's Flickr account for more photos of the ED5-PVH project.

Western’s Electric District 5-to-Palo Verde Hub project is another step closer to completion with Salt River Project’s fully energized Palo Verde-to-Southeast Valley-to-Browning, or PV-SEV, Redirect link 500-kilovolt transmission line and substations up and running. “Congratulations to SRP on this achievement,” said Western’s Desert Southwest Acting Regional Manager Ron Moulton. “We are thankful for our partnership with them to bring more stability and capability to Arizona’s power system.”

The new PV-SEV line connects SRP’s Duke Substation to Western’s newly-expanded Test Track Substation, and marks the completion for all transmission line construction and upgrades. “Western and SRP have been working together since 2010 on these system upgrades to support the electricity needs of Pinal, Pima and Maricopa counties,” said ED5 Project Manager Todd Rhoades. “Now, with SRP energizing the PV-SEV project and its tie to Western’s system, we’ve made a major step toward reaching our joint goals.”

Other key milestones for the project include:

  • ED-5 Substation construction is 99 percent complete.
  • Test Track Substation expansion is 99 percent complete.
  • Western has secured transmission capacity rights on the 500-kV PV-SEV line.

During inspection, Western staff and contractors identified some necessary corrections to delivered electrical equipment at ED5 Substation. Fixing the equipment has delayed the estimated in-service date of the ED5 Substation until winter 2014.

After all construction is complete, Western will complete testing and commissioning of the two substations, ED5 and Test Track. Once energized, the project will support the reliability of the Desert Southwest’s transmission system, serve the growing population south of Phoenix and encourage the development of renewable resources in the area.