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Electric Transmission

E3 has the experience to make your transmission project a success.

E3 has extensive transmission experience encompassing the entire project life cycle of new and existing transmission lines including the planning, pre-financing, financing, construction, performance testing, and operations and maintenance phases. E3 personnel also have 25 years average of experience in generation and transmission planning for utilities, control area design, system operations experience, and consulting for international clients and cogeneration assignments. We have completed more than 30 transmission consulting assignments that have included more than 2,000 miles of new build transmission projects ranging from less than one mile to more than 350 miles. Our collective experience includes elevated, buried, submerged lines, voltage ratings below and above 500kV, and AC/DC transmission and conversion.

Transelec Concesiones S.A.’s Trunk Expansion Projects

E3 is serving as the Independent Engineer for Transelec Concesiones S.A.’s Trunk Expansion Projects, which are designed to interconnect the trunk transmission projects in Chile.   Transelec is developing and constructing a Portfolio of three transmission expansion projects in Chile, each of which is in different stage of progress. These projects are: Nueva Charrúa Substation, sectioning 2×500 kV Charrúa-Ancoa Line and 2×220 kV Nueva Charrúa-Charrúa Line; the Pichirropulli-Puerto Montt 2×500 kV Line energized in 220 kV; and the Los Changos-Nuevo Crucero Encuentro 2×500 kV Line and 2×220 kV Los Changos-Kapatur Line.  E3’s review addressed the engineering, commercial, and environmental aspects of the expansion Project.

Antelope-Elk Energy Center Line, TX

E3 served as a technical advisor on new transmission project

E3 served as the Independent Engineer for the Sharyland Utilities 345 kV transmission line that connects the Antelope-Elk Energy Center in Hale County, Texas, to the White River substation in Floyd County, Texas. The line is owned by Golden Spread Electric Cooperative, and is approximately 51-mile long, running through the Panhandle of Texas. The Project is 100% regulated by the PUCT and receives revenues via a regulated rate base regime. The debt financing consisted of a construction and term-loan facility, with closing at the end of Q1 2015. Construction was completed in April, a month earlier than scheduled.

Trans Bay Cable Project, CA

E3 provided independent engineering services for submarine transmission system

Trans Bay Cable is a 400 MW HVDC transmission system using underground and marine power cables to bring power to the City of San Francisco. The cable connects the Pacific Gas & Electric (PG&E) Pittsburg Substation, which has excess electrical capacity, to a load pocket at PG&E’s Potrero Station in San Francisco. E3 provided a technical due diligence review in support of financing the development and construction of the Project on behalf of Bayerische Landesbank. After construction was completed, E3 provided a report to Barclays Capital to support the long-term financing of the Project. E3’s report addressed the engineering, commercial, and environmental aspects of the 54-mile HVDC cable project. The Project utilized Siemens inverter technology and Prysmian XPLE cables. E3 also monitored the performance of construction and testing of the cable, on behalf of the lenders.

Technology Lead

Vince Tummarello