Transcript ERCOT NERC Category C Analysis Methodology

ERCOT - NERC Category C Analysis
and Methodology
RPG Meeting - June 15, 2012
ERCOT – NERC Category C Analysis
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ERCOT performs the NERC Category C analysis to assess the
system reliability the following contingencies:
N-1-1 contingencies:
Loss of a single transmission element (voltage 100 kV or above) with
system redispatch/adjustments plus loss of a single transmission
element (voltage 100 kV or above)
Category C single event contingencies:
NERC Category C and D contingencies included in the SSWG
contingency (submitted by the TSP’s)
Other Category C included in ERCOT 5YTP:
All double circuit contingencies and the G-1 + N-1 contingencies are
studied in the 5YTP and planned as ERCOT Category B
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The ERCOT-NERC Category C steady-state analysis and
methodology is shown in the next two slides.
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Dynamic analysis for category C is handled by a different process.
ERCOT – NERC Category C Analysis
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ERCOT is currently performing the NERC Category C analysis (for
2012) based on the 2011 5YTP final case.
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The results of the analysis will be share with the TO’s by August.
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ERCOT - NERC Category C process and methodology is being
refined based on experience with 2012 analysis
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NERC category C process may be added to the ERCOT Planning
Guide
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RPG Meeting