Performance Analysis reviews current and historical reliability trends and metrics to objectively analyze reliability performance, risks, and emerging issues. The ERO-wide analysis is published in the annual NERC State of Reliability report. Texas RE publishes an annual Assessment of Reliability Performance report for the ERCOT region to specifically provide analysis and feedback on risks and reliability trends within the region. Texas RE also coordinates the collection of regional stakeholder data used in these analyses, primarily through NERC’s reliability data systems, as described below.
Performance Analysis Reports
NERC State of Reliability Report
The NERC State of Reliability report represents NERC’s independent view of ongoing BPS reliability trends to impartially analyze the state of reliability based on metric information and provides an integrated view of reliability performance. The key findings and recommendations serve as technical input to NERC’s Reliability Standards and project prioritization, compliance process improvement, event analysis, reliability assessment, and critical infrastructure protection.
ERCOT Region Assessment of Reliability Performance
The goals of the Assessment of Reliability Performance are to illuminate the historical and overall BPS reliability picture, help identify risk areas, prioritize and create actionable results for reliability improvements, and build on successes. This report represents the ongoing effort by Texas RE to provide a view of risks to reliability based on historic performance, integrate many ongoing efforts underway, provide analysis and feedback on risks and reliability trends, and understand the risks impacting reliability performance.
Reliability Data Systems
Texas RE provides coordination, analysis, user training, and support for the collection of performance data key to preparation of reports and other analysis. Applicable registered entities submit outage and availability data through a common NERC web portal managed by Open Access Technology International (OATI). NERC recently developed a separate portal for protection system misoperations.
DADS – Demand Response Availability Data System
Demand Response helps ensure resource adequacy while providing operators with additional flexibility in maintaining operating reliability. The DADS goal is to collect Demand Response data from events and to measure the actual performance to include system reliability. This analysis can provide the industry with a basis for projecting contributions of dispatchable and non-dispatchable Demand Response supporting forecast adequacy and operational reliability. DADS data is input twice yearly by ERCOT and certain registered Distribution Providers (DP) with demand response programs using the OATI webPortal.
DADS Contact – Bob Collins
TADS – Transmission Availability Data System
TADS collects simple transmission equipment availability data as well as detailed information about individual outage events in a common format. This provides a uniform approach to report and measure transmission availability, performance, and other related transmission system reliability data. Analysis on TADS data at the regional and NERC level will provide information that may be used to improve Bulk Electric System (BES) reliability. Registered Transmission Owners (TO) submit data quarterly through the OATI webPortal for their 138kV and 345kV facilities.
TADS Contact – Bob Collins
GADS – Generation Availability Data System
GADS collects design, event, and performance data about generation units for improving the performance of hydro and conventional electric generating equipment. GADS data also helps those researching the vast amounts of information on power plant availability. The information is used to support equipment reliability and availability analysis and decision making by GADS data users. Registered Generator Owners (GO) submit GADS data quarterly through the OATI webPortal.
Wind has become a major player in energy. NERC-registered Generator Operators who operate wind plants of 75 MW or greater of total installed capacity, and with a commission date of January 1, 2005 or later, report using the GADS Wind Data Submission Site. Reporting is phased in over a four-year period based on plant MW output. GADS Wind Turbine Generation Data Reporting Instructions assists wind plant personnel in reporting information to NERC. The instructions detail the procedure, schedule, and format to follow when reporting data.
GADS Contact – Jagan Mandavilli
MIDAS – Misoperation Information Data Analysis System
MIDAS collects protection system misoperation data as well as protection system operation counts in a common format. This provides a uniform approach to report, measure, and analyze protection system performance and to analyze misoperation data. Analysis of MIDAS data at the regional and NERC level provides information that may be used to improve BES reliability. Protection system operations data is submitted through the MIDAS system by GOs, TOs, and certain DPs with 100kV or higher voltage Transmission elements, and is due 45 days after the end of each quarter.
MIDAS Contact – David Penney