MIS LOG IN

Resource Adequacy 2017

Drought Risk

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.

Dec 29, 2017 - pdf - 340.4 KB
Sep 1, 2017 - pdf - 397.1 KB
May 30, 2017 - pdf - 256.2 KB
Apr 26, 2016 - xlsx - 230 KB

Generator Interconnection Status Report

View the latest public interconnection information on generation resources in the ERCOT region.

GIS REPORT December 2017
Generator interconnection activity for December
Jan 2, 2018 - xlsx - 1.4 MB
GIS REPORT November 2017
Generator interconnection activity for November
Dec 4, 2017 - xlsx - 1.4 MB
GIS REPORT October 2017
Generator interconnection activity for October
Nov 3, 2017 - xlsx - 1.4 MB
GIS REPORT September 2017
Generator interconnection activity for September
Oct 19, 2017 - xlsx - 1.4 MB
GIS REPORT August 2017
Generator interconnection activity for August. Revised to include missing Project Date column in Full Study Table and change IE Name for a resource in IA Table
Sep 13, 2017 - xlsx - 1.4 MB
GIS REPORT July 2017
Generator interconnection activity for July
Aug 2, 2017 - xlsx - 1.4 MB
GIS REPORT June 2017
Generator interconnection activity for June
Jul 3, 2017 - xlsx - 1.4 MB
GIS REPORT May 2017
Generator interconnection activity for May
Jun 1, 2017 - xlsx - 1.4 MB
GIS REPORT April 2017
Generator interconnection activity for April
May 1, 2017 - xlsx - 1.3 MB
GIS REPORT March 2017 Revised
Generation interconnection activity for March, revised to report the synchronization approval for the PHR Peaker project (INR 14INR0038)
Aug 9, 2018 - xlsx - 738.4 KB
GIS REPORT March 2017
Generator interconnection activity for March
Apr 4, 2017 - xlsx - 738.4 KB
GIS REPORT February 2017
Generator interconnection activity for February
Mar 2, 2017 - xlsx - 2.2 MB
GIS REPORT January 2017
Generator interconnection activity for January 2017
Feb 1, 2017 - xlsx - 1.3 MB
GIS REPORT December 2016
Generator interconnection activity for December 2016
Jan 4, 2017 - xlsx - 1.7 MB

Resource Adequacy Assessments

The SARA is based on criteria similar to CDR, however the seasonal outlook reflects near-term weather forecasts, generator outage trends, and updates to the generation fleet. 

Nov 1, 2017 - xlsx - 126.4 KB
Nov 1, 2017 - pdf - 259.4 KB
Nov 1, 2017 - xlsx - 125.4 KB
Nov 1, 2017 - pdf - 259.4 KB
Sep 7, 2017 - xlsx - 128.5 KB
Sep 7, 2017 - pdf - 234 KB
May 2, 2017 - xlsx - 122.6 KB
May 2, 2017 - pdf - 869.7 KB
May 2, 2017 - xlsx - 123.4 KB
May 2, 2017 - pdf - 885.1 KB
Mar 1, 2017 - xlsx - 124.8 KB
Mar 1, 2017 - xlsx - 126.3 KB
Mar 1, 2017 - pdf - 224.4 KB
Nov 1, 2016 - xlsx - 147.8 KB
Nov 1, 2016 - pdf - 218.3 KB
Nov 1, 2016 - xlsx - 145.4 KB
Nov 1, 2016 - pdf - 218.5 KB

This biannual report contains a 10-year forecast of electric use and expected generation resources.

Dec 19, 2017 - xlsx - 285.9 KB
Dec 19, 2017 - pdf - 813.2 KB
May 2, 2017 - xlsx - 278.6 KB

Planning Reserve Margin Analysis

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.

ERCOT Study Process and Methodology Manual for EORM/MERM 12-12-2017 v1.0
Final document version with responses to stakeholder comments incorporated
Dec 12, 2017 - docx - 756.2 KB
ERCOT Study Process and Methodology Manual for EORM MERM 11 3 2017 InitialDraft
Initial public draft for 30-day public review and comment period
Nov 3, 2017 - docx - 753.9 KB
Cost of New Entry Estimates for Combustion Turbine and Combined Cycle Plants in PJM
Report prepared for PJM Interconnection, Inc., by the Brattle Group and Sargent & Lundy.
May 22, 2017 - pdf - 2.2 MB
ERCOT EORM/MERM Stakeholder Comments Log, 5-22-2017
Stakeholder comments and ERCOT responses on the EORM/MERM study project.
May 22, 2017 - pdf - 89.2 KB
ERCOT EORM_Workshop 4-14-2017 Revised
EORM Workshop PowerPoint presentation. Reflects a revision to slide #31.
May 16, 2017 - pptx - 7.9 MB
ERCOT Primer on the NERC Reference Margin Level 5-15-2017
Background information on NERC's Reference Margin Level and how it is used for resource adequacy reporting in NERC reliability assessment reports.
May 16, 2017 - pdf - 196.9 KB
Estimating the Economically Optimal Reserve Margin in ERCOT Revised
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.