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.
Operator readings
Compare each operator’s reading at its stated time. Scheduled transfers and metered physical flow measure different things.
- As NYISO reports it
- 225 MW · New England → NYISO
Current reading · limit this way 330 MW · 105 MW left to schedule · as of Nov 10, 6:45 PM EST
- As ISO-NE reports it
- 227 MW · New England → NYISO
Current reading · limit this way 330 MW · as of Nov 10, 6:35 PM EST
Last 30 days
Hourly readings, signed so that up is power leaving the market. Each series identifies whether it measures flow or a transfer schedule.
Above zero: NYISO → New England. Below: the reverse.
- Usual direction
- New England → NYISO in 51% of hours
0% out, 51% in, 49% idle across 721 hours
- Average
- 124 MW · New England → NYISO
- When busy
- 330 MW
95th percentile of hourly flow either way
- Peak NYISO → New England
- 0 MW
- Peak New England → NYISO
- 330 MW
- Direction changes
- 0
- Hours near its rating
- 177 of 721
At 95% or more of 330 MW
Hardware
Its terminals, placed from named HIFLD substations or other cited geospatial sources where available.
- Converter
- New Haven, CT
41.2880, -72.9044 · 345 kV · representative location
- Converter
- Shoreham, NY
40.9583, -72.8664 · 138 kV
Sources and method
Readings come from NYISO and ISO-NE interface readings. Each value is shown with its operator and source time; direction is normalized from that operator’s sign convention toward or away from NYISO. A rating describes the equipment; an operator’s posted directional limit, when available, is a separate operating value. The map point identifies a sourced terminal or crossing where available, or a representative connection point; it does not trace the full route.