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Website · About · Legal · Privacy · Changelog · © 2026 Parisi Labs
  1. Home
  2. /Assets
  3. /Interties
  4. /Highgate
ISO-NE logo

Highgate

ISO-NE ↔ Hydro-Québec · Back-to-back HVDC converter

A back-to-back HVDC converter at Highgate, Vermont, bringing Québec power into northern Vermont.

Now
0 MWIdle
ISO-NE · as of Sep 26, 2:10 PM EDT
Between
ISO-NE and Hydro-Québec
Technology
Back-to-back HVDC converter
Rating
225 MW
In service
1985
Owners
VELCO
Published by
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 ISO-NE reports it
0 MW · Idle

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 ISO-NE reports it-0MW
17-107-232Aug 27, 2 PMSep 26, 2 PM

Above zero: ISO-NE → Hydro-Québec. Below: the reverse.

Hardware

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

Substation
Bedford, Québec

In Canada, outside HIFLD's coverage

Converter
Highgate converter, VT

44.9404, -73.0515 · 115 kV

Related interties

  • Champlain Hudson Power Express
    NYISO ↔ Hydro-Québec
  • Hydro-Québec–New York
    NYISO ↔ Hydro-Québec
  • Cedars Rapids
    NYISO ↔ Hydro-Québec
  • Hydro-Québec Phase II
    ISO-NE ↔ Hydro-Québec
  • New England Clean Energy Connect
    ISO-NE ↔ Hydro-Québec
  • New Brunswick–New England
    ISO-NE ↔ New Brunswick
Usual direction
Hydro-Québec → ISO-NE in 37% of hours

0% out, 37% in, 63% idle across 721 hours

Average
30 MW · Hydro-Québec → ISO-NE
When busy
199 MW

95th percentile of hourly flow either way

Peak ISO-NE → Hydro-Québec
0 MW
Peak Hydro-Québec → ISO-NE
214 MW
Direction changes
0
Hours near its rating
9 of 721

At 95% or more of 225 MW

The average day
0:006:0012:0018:0023:00
Mean flow by the market's local hour. Up: ISO-NE → Hydro-Québec. Down: Hydro-Québec → ISO-NE.