Independent Transmission Consulting

Tangibl played a key role in a multi-million dollar feasibility study for EHV AC and DC a proposed independent transmission project within railroad rights-of-way. We provided cost estimates, evaluated utility interconnection requirements and assessed aerial and underground construction, as well as capabilities of cable and equipment manufacturers. Tangibl provided the technical documentation for the solicitation document. Project team members included the Client, project-managing consultant, three law firms and a global investment-banking firm.

Follow-up work that grew out of Tangibl’s study resulted in over 500+ miles of Hyrail inspection of certain Class 1 freight railroads for another, similar project.  Estimates for infrastructure investment were generated, which rolled up into a total proposed capital expenditure of nearly $1 billion.  Underground cable and aerial design concepts were validated, which made the project technically and economically feasible.  Although the project ultimately was unable to obtain the necessary financing, it was approved by state and federal regulators.

In another project, Tangibl provided technical consulting for a proposed multi-terminal HVDC cable system that would integrate offshore wind into PJM.  The project’s benefits included more cost-effective interconnection of significant wind resources, controllable flow through voltage-source-converter (VSC) HVDC terminals, and improved deliverability into PJM’s most constrained zone.  Tangibl assisted the project as it participated in the first competitive solicitation by PJM for a reliability solution to a long-standing stability problem associated with nuclear facilities.  Tangibl provided numerous power system simulations, cost estimates and general advisory services, all based on our decades of experience with PJM and its transmission-owning utilities.