TADS efforts began in 2006 with the formation of the TADS Task Force under the NERC Planning Committee. This task force designed TADS and the associated processes for collecting TADS data. On June 30, 2009, the task force issued its first reports for data collected in 2008. On July 1, 2009, the task force was retired and replaced with the TADS Working Group. This change recognized the ongoing design and oversight of TADS that is more appropriately assigned to a working group than a task force. NERC uses the information to develop transmission metrics that analyze outage frequency, duration, causes, and many other factors related to transmission outages.
While TADS is not intended to provide determinative performance measures, it is used to quantify certain performance aspects. In addition to collecting simple transmission equipment availability, TADS will collect detailed information about individual outage events that, when analyzed at the regional and NERC level, will provide data that may be used to improve reliability.
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Effective February 10, 2020, changes have been made to the web TADS. A list of changes is available in the January, 2020 TADSWG agenda as well as in the Dashboard News in the OATI portal.
Deadlines for Data Submission Into WebTADS Are:
February 15, for the prior year
June 29, for Quarter 1, January 1 – March 31
August 15, for Quarter 2, April 1 – June 30
November 15, for Quarter 3, July 1 – September 30
February 15, for Quarter 4, October 1 – December 31
When the deadline falls on a weekend, reporting will be extended through the following Monday.
Element Inventory Dashboard
Events and Outages by Event Type Dashboard
Sustained Outages by Cause Code Dashboard
Momentary Outages by Cause Code Dashboard
Non-Automatic Outage Metrics Dashboard
Outage Metrics Dashboard
Transmission Availability Analysis Dashboard
TADS Dashboard Raw Data Spreadsheet
OATI - How to set up an account
Transmission Availability Data System Working Group (TADSWG)
Data Quality Control Process
TADS Phase II Fnal Report
TADS Section 1600 Data Request Planned Outages
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