345 kV Transmission Line EPC Wind Power Project
Type of Client: Utility Project
Region: Southwest
Services: Engineer of Record providing engineering, permitting, procurement, and construction support during development as part of EPC team.
Project Overview
This project involved the construction of a 10.24-mile 345 kV transmission line in the eastern Southwest, associated with a wind farm developed under an EPC agreement. The transmission line was designed to enhance the region's renewable energy infrastructure and ensure reliable power delivery.
Engineering and Design
The transmission line utilized tubular steel single-pole structures, with guyed steel structures at most angle locations and unbuoyed steel structures at select points. These structures supported an Optical Ground Wire (OPGW) for full-length communication. Additionally, a shield wire was installed opposite the OPGW where the line transitioned to a flat configuration as it entered the substations at each end.
Commonwealth's Role
- Commonwealth played a crucial role in this project by:
- Assisting in the economic selection of conductors.
- Providing line loss and thermal capacity calculations.
Evaluating various structure framing options to ensure the line met code requirements and provided reliable service while being economically viable in a competitive market.
Structure Framing
The structure framing consisted of Polymer Braced-Post assemblies on Tangents, supporting a Vertically Oriented Twin-Bundled 795 ACSR Drake conductor. The spans ranged from 1,000 to 1,200 feet within a 150-foot-wide easement, ensuring optimal performance and reliability.
For more information on how Commonwealth is ready to meet your EPC needs, contact us today!