Laredo VFT
ERCOT ↔ Mexico (CFE) · Variable frequency transformer
A 100 MW variable frequency transformer at Laredo linking ERCOT to CFE's Ciudad Industrial substation in Nuevo Laredo. DOE's border permit describes two associated AC circuits, one operated at 138 kV and one at 230 kV; they feed this controlled interconnection rather than representing two independently metered market ties. The marker is at the mapped U.S. VFT yard. ERCOT's DC_L reading is the matched live transfer.
Operator readings
Compare each operator’s reading at its stated time. Scheduled transfers and metered physical flow measure different things.
- As ERCOT reports it
- 0 MW · Idle
Current reading · as of Nov 10, 5:40 PM CST
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: ERCOT → Mexico (CFE). Below: the reverse.
- Usual direction
- ERCOT → Mexico (CFE) in 21% of hours
21% out, 7% in, 72% idle across 720 hours
- Average
- 6 MW · ERCOT → Mexico (CFE)
- When busy
- 63 MW
95th percentile of hourly flow either way
- Peak ERCOT → Mexico (CFE)
- 70 MW
- Peak Mexico (CFE) → ERCOT
- 25 MW
- Direction changes
- 13
- Hours near its rating
- 0 of 720
At 95% or more of 100 MW
Hardware
Its terminals, placed from named HIFLD substations or other cited geospatial sources where available.
- Converter
- Laredo VFT South Yard, TX
27.5701, -99.5095 · mapped source
- Substation
- Ciudad Industrial, Tamaulipas
In Mexico, outside HIFLD's coverage
Sources and method
Readings come from ERCOT 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 ERCOT. 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.