Hydro-Québec Phase II
ISO-NE ↔ Hydro-Québec · HVDC line (line-commutated)
A multi-terminal HVDC line from James Bay hydro in northern Québec to the Sandy Pond converter in Ayer, Massachusetts: New England's largest single import path.
Operator readings
Compare each operator’s reading at its stated time. Scheduled transfers and metered physical flow measure different things.
- As ISO-NE reports it
- 0 MW · Idle
Current reading · limit this way 1,200 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: ISO-NE → Hydro-Québec. Below: the reverse.
- Usual direction
- ISO-NE → Hydro-Québec in 14% of hours
14% out, 1% in, 85% idle across 720 hours
- Average
- 86 MW · ISO-NE → Hydro-Québec
- When busy
- 833 MW
95th percentile of hourly flow either way
- Peak ISO-NE → Hydro-Québec
- 896 MW
- Peak Hydro-Québec → ISO-NE
- 327 MW
- Direction changes
- 6
- Hours near its rating
- 0 of 720
At 95% or more of 2,000 MW
Hardware
Its terminals, placed from named HIFLD substations or other cited geospatial sources where available.
- Converter
- Radisson converter, Québec
In Canada, outside HIFLD's coverage
- Converter
- Nicolet converter, Québec
In Canada, outside HIFLD's coverage
- Converter
- Sandy Pond converter, MA
42.5684, -71.5304 · 345 kV
Sources and method
Readings come from 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 ISO-NE. 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.