Ontario–Québec radial ties
IESO ↔ Hydro-Québec · AC transmission
IESO's smaller Québec intertie zones: AC circuits over which a generator or a block of load is switched from one system to the other, since Québec does not run in synchronism with Ontario.
What it is carrying
Each operator's own reading, turned into a direction. Where both markets publish the tie, the two should agree.
- As IESO reports it
- 10 MW · IESO → Hydro-Québec
as of Oct 10, 1:00 PM EDT
Last 30 days
Hourly flow, signed so that up is power leaving the market.
Above zero: IESO → Hydro-Québec. Below: the reverse.
- Usual direction
- IESO → Hydro-Québec in 87% of hours
87% out, 4% in, 9% idle across 719 hours
- Average
- 17 MW · IESO → Hydro-Québec
- When busy
- 33 MW
95th percentile of hourly flow either way
- Peak IESO → Hydro-Québec
- 40 MW
- Peak Hydro-Québec → IESO
- 32 MW
- Direction changes
- 10
Sources and method
Flow comes from IESO 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 IESO. 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.