Battery Energy Storage Systems
Transmission Line
Astoria, NY
New York State’s ambitious climate change mitigation goals have incentivized the development of a large-scale battery energy storage system (BESS), comprising 100 MW or 400MWh of power. This BESS will displace fossil fuel-powered energy generation when demand is highest.
H2M identified multiple potential routes for a transmission line connecting the large-scale BESS to the local substation, as well as specifications for the high-voltage cable, medium collector switchgear and controls, step-up transformer, and duct bank protecting the gen-tie cable powering the nearby 138-kV ring bus. H2M also provided electrical engineering consulting services and supported the client while submitting the large facility interconnection application to the New York Independent System Operator.
H2M has been involved with this project since the initial siting and preliminary design. The transmission line runs approximately 425 feet across properties owned by multiple electric utility providers. One of the unique challenges for this project involved routing the alignment of the gen-tie cable and duct bank through a multitude of existing subsurface utilities.
To inform decisions on the proposed route, H2M extensively documented existing utilities within the project area based on records, surveys, and plans provided by the client and utility providers. The client then used this information to perform a Quality Level-A subsurface utility location survey, which identified the location of existing utilities. With this data, H2M will determine an optimized route.
