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Changes in Relay Misoperations Reporting. Curtis Crews, Reliability Services Texas Reliability Entity, Inc. Highlights. Changes Why Change? How to Change?. Changes. Reporting Form Consistency in data, definitions, and format (currently being reviewed by SPCS) Reporting Periodicity - PowerPoint PPT Presentation
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Curtis Crews, Reliability ServicesTexas Reliability Entity, Inc.
Changes in Relay Misoperations Reporting
2
Highlights
● Changes● Why Change?● How to Change?
ERCOT ROS November 11, 2010
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Changes
ERCOT ROS November 11, 2010
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History of Proposed Changes
● Result of NERC Reliability Metrics Working Group (RMWG), ERO-Reliability Assessments and Performance Analysis Group (ERO-RAPA), discussions
● Coordinated with Reliability Assessment Subcommittee (RAS), System Protection and Control Subcommittee (SPCS), Transmission Availability Data System Working Group (TADSWG), Transmission Availability Data System Regional Entity Coordinators (TADS-REC)
ERCOT ROS November 11, 2010
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Adequate Levels of Reliability(ALRs defined by RMWG)
● ALR4-1 Automatic Transmission Outages (ATO) Caused by Protection System Misoperations
● ALR6-11 ATO initiated by Failed Protection System
● ALR6-12 ATO initiated by Human Error● ALR6-13 ATO initiated by Failed AC Substation
Equipment● ALR6-14 ATO initiated by Failed AC Circuit
Equipment
ERCOT ROS November 11, 2010
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ERO-RAPA Key Function
● Develop a plan and an enterprise approach to data collection, checking, validation and assessment for use throughout NERC and the eight Regional Entities.
ERCOT ROS November 11, 2010
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Transmission Availability Data System(TADS)
● System change required to capture misoperation data
● Expansion of data required (TADS reports >200kV)
● Communication issues with TADS responsible entity and Relay Misoperation responsible entity
● TADS personnel are not Relay personnel
ERCOT ROS November 11, 2010
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How to change?
● NERC Standard change● NERC Rules of Procedure Section 1600
Request● Change TADS● Regional procedures
● First 3 options determined to be a more extended timeframe
ERCOT ROS November 11, 2010
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0
50
100
150
200
250
2006 2007 2008 2009 2010
Total Misoperations vs. Year
020406080
100120140160180200
2006 2007 2008 2009 2010
Misoperations vs. Year345 kV 138 kV
0.00%
2.00%
4.00%
6.00%
8.00%
10.00%
12.00%
14.00%
2006 2007 2008 2009 2010
% Misoperation vs. Year345 kV 138 kV
Misoperations “Trend”
ERCOT ROS November 11, 2010
10
26%
24%
10%
22%
17%
Relay Settings
Implementation (Wiring errors,etc.)
Relay Failure
Pilot
Other
Per TADS Definitions:50% of 2009 misoperations attributable to Human Error
Summary of 2009 Misoperations - Cause
ERCOT ROS November 11, 2010
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Summary of 2010 Misoperations - Cause
37%
22%
9%
23%
10%
Relay Settings
Implementation (Wiringerrors, etc.)
Relay Failure
Pilot
Other
Per TADS Definitions:59% of 2010 misoperations attributable to Human Error
ERCOT ROS November 11, 2010
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References
● NERC Reliability Metrics Working Grouphttp://www.nerc.com/filez/rmwg.html
● NERC ERO Reliability Assessments and Performance Analysis Grouphttp://www.nerc.com/filez/ero-rapa.html
● NERC System Protection and Control Subcommitteehttp://www.nerc.com/filez/spctf.html
● ERCOT System Protection Working Grouphttp://www.ercot.com/committees/board/tac/ros/spwg/
● ERCOT Operating Guideshttp://www.ercot.com/mktrules/guides/operating/
ERCOT ROS November 11, 2010