Delivering Utility-Scale Energy Storage Development
Mortenson was responsible for delivering the balance of plant and energy management system scopes for two co-located energy storage facilities totaling 300 MW/600 MWh. The work included civil site development, battery energy storage installation, substation construction, and supporting power delivery infrastructure.
Mortenson self-performed all civil site work and the majority of energy storage installation activities, allowing key scopes to be executed concurrently throughout construction.
Integrating Energy Storage and Power Delivery Systems
Each energy storage facility included 46 Power Electronics inverters, rated at 4,200 kVA. Power conversion systems were supplied by Hithium battery energy storage system containers rated at 4.179 MWh each.
To support facility operations, Mortenson constructed two 345 kV/34.5 kV substations. The medium-voltage collection system operated at 34.5 kV, with main power transformers increasing voltage to 345 kV for transmission.
Substation 1 supported the completed energy storage facilities and included two main power transformers procured by Mortenson. Substation 2 was designed and constructed to support future solar infrastructure.
Integrated Engineering and Construction Execution
Mortenson Engineering Services designed the substations' foundations, structural steel, physical electrical systems, protection and control systems, and SCADA systems.
Construction of both substations was self-performed by Mortenson and executed concurrently with development of the energy storage yards, enabling coordinated delivery of both the energy storage and power delivery infrastructure.
