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Website · About · Legal · Privacy · Changelog · © 2026 Parisi Labs
  1. Home
  2. /Assets
  3. /Interties
  4. /Cross Sound Cable
NYISO logo

Cross Sound Cable

NYISO ↔ New England · HVDC line (voltage-source)

A submarine HVDC cable under Long Island Sound from New Haven, Connecticut to Shoreham on Long Island.

Now
330 MWNew England → NYISO
NYISO · as of Sep 26, 2:20 PM EDT
Between
NYISO and New England
Technology
HVDC line (voltage-source)
Rating
330 MW
Voltage
±150 kV DC
Length
24 miles
Published by
NYISO and ISO-NE
Open on the map

What it is carrying

Each operator's own reading, turned into a direction. Where both markets publish the tie, the two should agree.

As NYISO reports it
330 MW · New England → NYISO

limit this way 330 MW · 0 MW left to schedule · as of Sep 26, 2:20 PM EDT

As ISO-NE reports it
331 MW · New England → NYISO

limit this way 330 MW · as of Sep 26, 2:10 PM EDT

Price across the seamReal-time · EDT
Reading prices…

Last 30 days

Hourly flow, signed so that up is power leaving the market.

As NYISO reports it
-330MW
127-119-365Aug 27, 2 PMSep 26, 2 PM

Above zero: NYISO → New England. Below: the reverse.

Hardware

Its terminals. US terminals are placed on the substation HIFLD's national dataset names for them.

Converter
New Haven, CT

41.2880, -72.9044 · 345 kV · nearest mapped substation

Converter
Shoreham, NY

40.9583, -72.8664 · 138 kV

Related interties

  • Champlain Hudson Power Express
    NYISO ↔ Hydro-Québec
  • Hydro-Québec–New York
    NYISO ↔ Hydro-Québec
  • Cedars Rapids
    NYISO ↔ Hydro-Québec
  • Norwalk–Northport 1385
    NYISO ↔ New England
  • Neptune
    NYISO ↔ PJM
  • Hudson Transmission Project
    NYISO ↔ PJM
  • Linden VFT
    NYISO ↔ PJM
  • PJM–New York AC interface
    NYISO ↔ PJM
Usual direction
New England → NYISO in 92% of hours

0% out, 92% in, 8% idle across 721 hours

Average
238 MW · New England → NYISO
When busy
330 MW

95th percentile of hourly flow either way

Peak NYISO → New England
92 MW
Peak New England → NYISO
330 MW
Direction changes
4
Hours near its rating
320 of 721

At 95% or more of 330 MW

The average day
0:006:0012:0018:0023:00
Mean flow by the market's local hour. Up: NYISO → New England. Down: New England → NYISO.