ERCOT developed a drought risk monitoring tool to screen for potential drought-related impacts to generation resources. The tool predicts whether water supplies used by generation resources in the ERCOT region are at risk of reaching levels requiring closer monitoring over the next 6 to 18 months, based on the most recent reservoir and lake levels from the Texas Water Development Board (TWDB) and historical trends in water usage. The documents available in this section include summaries of the results of this analysis, documentation of the tool methodology, and other related reports.
This section consists of documents and data files pertaining to the Economically Optimum Reserve Margin (EORM) reporting initiative, which was authorized by the Public Utility Commission of Texas as part of Project Number 42302, "Review of the Reliability Standard in the ERCOT Region." The current minimum target reserve margin established by the ERCOT Board of Directors is 13.75 percent of peak electricity demand to serve electric needs in the case of unexpectedly high demand or levels of generation plant outages.
Report prepared by The Brattle Group and Astrape Consulting for the Public Utilities Commission of Texas, filed January 31, 2014. This version comes from the Brattle Group’s Web site, and reflects post-filing corrections to page 63.
May 16, 2017 - pdf - 3.2 MB
Wind and Solar
Wind and solar profiles for use in ERCOT planning studies, as well as files showing the derivation of wind and solar peak average capacity percentages using approved CDR methodologies.