The Poseidon project is a proposed electric transmission line that will deliver 500 MW of low-cost renewable energy to Long Island at an affordable price.

The Poseidon project can help realize two of New York State’s signature energy goals – 50% of electricity from renewables by 2030 and keeping electricity affordable for Long Island’s ratepayers.  Poseidon will bring renewable, affordable energy from PJM, the world’s largest and most competitive wholesale power market, to Long Island.  Renewable energy at this large scale and low price is not available from elsewhere.  Long Island lacks the space to deploy solar or land-based wind on a scale required to reach the “50 by 30” goal and offshore wind remains very expensive. Wind from the PJM market, from Pennsylvania and even points to the west, benefits from low land and construction costs and resulting economies of scale. Poseidon anticipates that such power can be provided at a cost 50% to 75% less than the cost of renewable energy produced on Long Island or offshore.

The 78-mile project will originate at PJM’s 500 kV Deans substation in South Brunswick, New Jersey and will be buried along its 21.5 mile route in New Jersey, until reaching the Raritan Bay. From here, it will be buried underwater in the outer New York Harbor, and Atlantic Ocean until it makes landfall in Long Island.  It then will  be buried under municipal, county, and state roads until it reaches the LIPA 138 kV Ruland Road substation in Melville, New York.

HVDC technology is deployed around the world to transport electricity over long distances while minimizing line losses.  HVDC technology has no impact on the environment or health and human safety.  Because Poseidon will be buried along its entire route, the line will not interfere with views or increase overhead congestion. Poseidon will deploy the most advanced version of HVDC technology and therefore will offer Black Start capability – especially valuable given’s Long Island concerns about grid reliability — and voltage support service, a helpful grid stabilizer, given Long Island’s highly residential pattern of development.

Like the Long Island portion of the project, the New Jersey cable and converter station create no harmful air or water emissions and will place virtually no burden on local governmental services – all while making significant investments in New Jersey communities, creating hundreds of construction jobs, and strengthening the New Jersey electrical grid. The fact that the route will be entirely buried means it will have no residual aesthetic impact on its host communities or the environment.

Project Overview

The 78-mile Poseidon line begins in South Brunswick, New Jersey and connects to Long Island at the Ruland Road substation in Melville. This high-voltage direct current line will be buried underground or underwater over its entire route – leaving no impact on the surrounding environment. The project will help deliver affordable renewable energy to the heart of Long Island’s transmission and distribution network.






Notice of Open Solicitation

Poseidon Transmission 1, LLC (the “Company”), seeks generation suppliers wishing to offer energy, renewable energy credits, and/or capacity to the New York Power Authority (“NYPA”) via the Poseidon Transmission Project, a 79 mile high voltage, direct current transmission link between PJM and Zone K in the NYISO. Read More…





Environmental Benefits

The greatest single challenge in the development of renewable energy remains its cost. Poseidon provides Long Island with renewable energy at an affordable price. The project produces zero air or water emissions in New Jersey and Long Island, helping to safeguard local air quality and aquifers.