Pre-Scheduled ATC/TTC

NYISO long-term pre-scheduled available transfer capability and total transfer capability by interface.

Congestion & Constraints data

Download data

Native record

event_time x interface_name

scheduled publication cadence

Evidence

Observed market data

Published observations from the named source

Time basis

Point-in-time records

UTC · event_time

Overview

Use it for forward interface-capability context rather than live flows.

Query contract

Preserve one canonical row per (event_time, interface_name) before aggregating.

Analysis rules

Group only after preserving the declared grain: event_time, interface_name.

Schema7

Column

Type

event_timeDateTime64(6, 'UTC')

interface_nameLowCardinality(String)

time_zoneNullable(String)

ttc_mwNullable(Float64)

atc_mwNullable(Float64)

lengthNullable(String)

ingested_atDateTime64(6, 'UTC')

Sample data

event_time	interface_name	time_zone	ttc_mw	atc_mw	length	ingested_at
2028-01-01 05:00:00.000000	SCH-VFT_PJM	EST	315	315	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	SCH-PJM_VFT	EST	315	315	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	SCH-PJM_HTP	EST	660	660	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	SCH-HTP_PJM	EST	0	0	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	PJM-NYISO	EST	2200	900	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	PJM-NEPTUNE	EST	660	660	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	NYISO-PJM	EST	1300	1150	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	NYISO-ISONE	EST	1600	1200	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	NYISO-IMO	EST	1600	850	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	NYISO-HQ	EST	1000	700	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	NPX-CSC	EST	330	330	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	NPX-1385	EST	200	200	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	ISONE-NYISO	EST	1400	800	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	IMO-NYISO	EST	2000	900	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	HQ-NYISO	EST	1500	800	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	HQ-CHPE	EST	1250	1250	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	HQ-CEDARS	EST	270	270	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	CSC-NPX	EST	330	330	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	CEDARS-HQ	EST	100	100	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	1385-NPX	EST	200	200	year	2026-10-01 14:45:17.014570
2028-01-01 05:00:00.000000	SCH-VFT_PJM	EST	315	315	year	2026-10-01 13:45:16.649055
2028-01-01 05:00:00.000000	SCH-PJM_VFT	EST	315	315	year	2026-10-01 13:45:16.649055
2028-01-01 05:00:00.000000	SCH-PJM_HTP	EST	660	660	year	2026-10-01 13:45:16.649055
2028-01-01 05:00:00.000000	SCH-HTP_PJM	EST	0	0	year	2026-10-01 13:45:16.649055
2028-01-01 05:00:00.000000	PJM-NYISO	EST	2200	900	year	2026-10-01 13:45:16.649055

Coverage

59.3% complete3,570 gap days5,197 days with data

Show coverage history

Coverage: 59.3%Days with data: 5,197Gaps: 3,570

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Related congestion & constraints data

Related congestion & constraints data
Dataset	Description
Available & Total Transfer CapabilityNYISO · hourly / 15-minute market-run timesteps	NYISO available transfer capability and total transfer capability by interface and market run. The source rows are melted so DAM and HAM timesteps can be compared by interface over time.
Day-Ahead Limiting ConstraintsNYISO · hourly (DAM)	NYISO day-ahead limiting-constraint records for the market-clearing plan, including limiting facility, facility PTID, contingency, and constraint cost. Paired with day-ahead LBMP components, it helps explain expected congestion and transfer limits before real-time operations.
NYISO Day-Ahead Binding ConstraintsNYISO · hourly	Which transmission facilities bound in NYISO's day-ahead market and what each one cost, one row per interval and constraint. 1.02M rows, 2001-08 to the next delivery day. Columns: event_time, constraint_name, shadow_price_usd_mwh, plus contingency. The shadow price is the marginal cost of the binding limit — what the market would have saved from one more megawatt of capability on that element. This is the table that answers WHY congestion appeared; a price spread between two locations shows that they separated but not which facility separated them.
NYISO Real-Time Binding ConstraintsNYISO · 5-minute	Which transmission facilities bound in NYISO's real-time market and what each one cost, one row per interval and constraint. 5.87M rows, 2001-06 to now. Columns: event_time, constraint_name, shadow_price_usd_mwh, plus contingency. The shadow price is the marginal cost of the binding limit — what the market would have saved from one more megawatt of capability on that element. This is the table that answers WHY congestion appeared; a price spread between two locations shows that they separated but not which facility separated them.