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NYISO Selects Projects to Bolster the New York State Grid

The New York Independent System Operator (NYISO) chose two transmission projects that it said will add one of largest amounts of transmission capacity to the state’s grid in more than 30 years.

New York state utility regulators identified a need to expand the state’s AC transmission capability to carry additional power from generating facilities in upstate New York, including renewable resources, to load centers located downstate. The regulators identified needs to increase transfer capability from central to eastern New York by at least 350 MW (known as “Segment A”) and from the Albany region through the Hudson Valley region by at least 900 MW (“Segment B”).

To address those needs, NYISO selected a proposal by North America Transmission (NAT) and the New York Power Authority (NYPA) for Segment A, and a proposal for Segment B from National Grid and Transco.

The NAT/NYPA Central East Project Details (Segment A) involves building a new 345 kV line from Edic to New Scotland on existing right-of-way; construction of two new 345 kV lines from Princetown to Rotterdam also on existing right-of-way; decommissioning of two 230 kV lines from Edic to Rotterdam; and related switching or substation work at Edic, Princetown, Rotterdam and New Scotland.

The National Grid/Transco UPNY/SENY Project Details (Segment B) project involves segments.

Knickerbocker to Pleasant Valley: Work here will include constructing a new double-circuit 345 kV/115 kV line from Knickerbocker to Churchtown on existing right-of-way; constructing a new double circuit 345 kV/115 kV line from Churchtown to Pleasant Valley on existing right-of-way; decommissioning a double-circuit 115 kV line from Knickerbocker to Churchtown; decommissioning of two double circuit 115 kV lines from Knickerbocker to Pleasant Valley; constructing a new tap of the New-Scotland Alps 345 kV line and new Knickerbocker switching station; and performing related switching or substation work at Greenbush, Knickerbocker, Churchtown and Pleasant Valley substations.

Upgrades to the Rock Tavern Substation: Work here will include new line traps, relays, potential transformer upgrades, switch upgrades, system control upgrades and the installation of data acquisition measuring equipment and control wire needed to handle higher line currents that will result from the new Edic/Marcy to New Scotland; Princetown to Rotterdam and Knickerbocker to Pleasant Valley lines.

Shoemaker to Sugarloaf:  Work here will consist of constructing a new double circuit 138 kV line from Shoemaker to Sugarloaf on existing right-of-way; decommissioning a double circuit 69 kV line from Shoemaker to Sugarloaf; and performing related switching or substation work at Shoemaker, Hartley, South Goshen, Chester, and Sugarloaf.

NYISO said it will work with the developers to enter into agreements to develop and operate the transmission projects, including a schedule for siting, permitting, interconnection, construction, and other milestones for entry into service by December 2023.

DW Keefer's picture

Thank DW for the Post!

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Paul Dumais's picture
Paul Dumais on April 24, 2019

After more than five years, it is good to see these transmission projects moving forward.  

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