HVDC Converter Station

SECo was contracted for balance of plant engineering for the upgrade and replacement of a 30-year-old HVDC back-to-back converter station in Texas. This upgrade, a key component of a major HVDC transmission link between neighboring independent system operators (ISOs) grids, improved power exchange efficiency and enhanced grid reliability and stability. The project was finished in 22 months, with the new station operating in 2014.

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Project Included:

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• Electromechanical Design for the 345kV Dead-End Towers, 345kV Bypass Line, and the AC Portion of the Converter Station​

• Electrical Layout and Details for Conduit, Cable Trench and Grounding Systems​

• Civil/Structural Design for all Station and Support Equipment​

• Control Enclosure Auxiliary System Design​

• Various Illumination, AC Load, Grounding, and Lightning Protection Studies​

• Prepared “As-Built” Record Drawings from Field Red Line Marked-Up Prints Provided by Field Construction Crews