Overview
Great Bay Substation is an operational electrical substation owned by Eversource in the United States. It operates at 115 kV, serving the regional grid.
Great Bay Substation is an operational electrical substation located in the United States, owned and operated by Eversource, a major utility in the Northeast. The facility operates at 115 kV, placing it in the medium-voltage range typical for distribution and sub-transmission substations that support local grid reliability. As a substation under Eversource's management, Great Bay Substation adheres to North American Electric Reliability Corporation (NERC) reliability standards and Federal Energy Regulatory Commission (FERC) regulations for transmission-level assets. The 115 kV voltage level is common for interconnecting distribution networks and industrial customers, with switchgear and protection systems likely following IEEE and IEC standards. The substation plays a key role in maintaining grid stability in the region, supporting electricity delivery to residential, commercial, and industrial users. Its operational status ensures continued service, and its location in New Hampshire contributes to the state's electrical infrastructure resilience.
Environmental context
The substation is situated in a region with mixed urban and rural land use, near the Great Bay estuary. Electrical infrastructure at this voltage level typically has minimal direct environmental impact, though proper maintenance of switchgear and oil-filled equipment is essential to prevent leaks. The facility's location in a coastal area may require attention to storm resilience and flood risk management.
Frequently asked questions
Great Bay Substation is located in the United States, near the Great Bay estuary in New Hampshire, at coordinates 43.008871, -70.886784.
Great Bay Substation operates at 115 kV, which is a medium-voltage level commonly used for sub-transmission and distribution in the US electrical grid.
Great Bay Substation is owned and operated by Eversource, a major utility company serving parts of New England.
Substations in the US must comply with NERC reliability standards for grid stability and FERC regulations for interstate transmission. Equipment often follows IEEE and IEC standards.
A 115 kV substation steps down transmission voltage for distribution to local networks, serving industrial, commercial, and residential customers while ensuring grid reliability.