Deepwater Wind - Energy Highway

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• Supports development of a new green industry in downstate New York;
• Satisfies approximately 52% of New York State’s remaining 2015 RPS goal and
100% of LIPA’s 2020 renewable energy supply goal;
• Satisfies LIPA’s entire greenhouse gas emissions reduction target;
• Diversifies downstate New York’s electric fuel supply; and
• Provides long-term supply flexibility.!
Offshore Wind Plant. DWEC will consist of 150 WTGs, each with a nameplate capacity
of 6 MW, and will be built in two arrays of 450 MW each, for a total of 900 MW.
Deepwater’s analysis demonstrates that the Project site could accommodate up to 200
WTGs, allowing for future expansion. DWEC is the most advanced second-generation
offshore wind plant in the United States and is widely expected to be one of the first
utility-scale offshore wind farms to receive permits and site control. Given its location in
a high wind-speed area, the 900 MW Wind Plant will have a capacity and peak
coincidence factors that are superior to those of near-shore offshore wind plants and that
far exceed those of land-based wind farms in the Northeast.
Controllable HVDC Transmission Network. NELI is modeled after similar offshore
networks that have been proposed in Northern Europe and elsewhere. Using
commercially tested technologies similar to those already in use in New York, NELI is a
600 MW HVDC transmission facility that will connect the Brayton Point, Massachusetts
high-voltage substation in ISO-NE with LIPA’s Shoreham substation, and will include an
offshore substation to which DWEC will interconnect and deliver power. The distance
from Brayton Point to the Wind Plant is approximately 38 miles; and from the Wind
Plant to Shoreham, approximately 98 miles.
The Shoreham interconnection point has a number of advantages including adequate
space for the location of a converter station, direct access to Long Island Sound, and
sufficient electrical capacity to handle a new 600 MW interconnection without the need
for significant upgrades. Additionally, interconnecting at Shoreham increases the
efficiency of the LIPA transmission system by supplying the under-served eastern load
pocket and by more fully utilizing the transmission infrastructure that is currently in
place.
NELI not only enables LIPA to receive the benefits of firm power by firming an
intermittent wind resource, it also enhances the economic efficiency of DWEC by
improving the utilization of the Wind Plant’s transmission infrastructure and providing
Zone K access to cost effective supply in the ISO-NE market.
Supply of Firm Power and Zone K Capacity. The 900 MW Wind Plant will deliver
power to the NELI offshore substation and the first power generated, up to NELI’s 600
MW limit, will be transmitted to Zone K. With Deepwater’s Project, NY-ISO’s Zone K
will receive a firm block of 600 MW of power, most of which will be generated by
DWEC. During periods when the output of the Wind Plant is greater than 600 MW, the
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