Texas Regional Entity Presentation
Texas Regional Entity
Compliance Report
Board of Directors
August 17, 2009
Overview
¡ñ July 2009 ERCOT CPS1 Monthly Performance
¡ñ July 2009 SCPS2 Scores for Non-Wind and Wind Only QSEs
¡ñ June 2009 Resource Plan Performance Metrics for Non-Wind and
Wind Only QSEs
¡ñ Key Issues
? NERC Organization Registration and upcoming Compliance
Workshop schedule
? NERC Standards Self-Certification update and Schedule
? NERC Audit & Enforcement Highlights
? Technical Feasibility Exceptions (TFEs)
? Nodal Regulatory Requirements
? PRR ¨C 822 Removing Access to Restricted Computer Systems,
Control Systems and Facilities
Page 2 of 16
ITEM 4A - COMPLIANCE REPORT
AUGUST 17, 2009
CPS1 Average
July 2009 ERCOT¡¯s CPS1 Monthly Performance
170
170
160
160
150
150
140
140
130
130
120
120
110
110
100
100
Monthly Avg
12Actual
Mo Rolling Avg
Page 3 of 16
Poly.
(12 Mo Rolling Avg)
Trend
ITEM 4A - COMPLIANCE REPORT
AUGUST 17, 2009
Analysis of CPS1 Monthly Performance
¡ñ Purpose: To maintain Interconnection steady-state
frequency within defined limits by balancing real
power demand and supply in real-time
¡ñ CPS1 is one reliability measure of how well the ERCOT
region managed the BPS
¡ñ ERCOT region¡¯s frequency performance is determined
by NERC Control Performance Standard 1 (CPS1)
¡ñ Seasonal fluctuation is expected
¡ñ Scores for individual months can be adversely affected
by events (such as hurricanes)
¡ñ A detailed formula can be found in NERC Reliability
Standard BAL-001-0a
Page 4 of 16
ITEM 4A - COMPLIANCE REPORT
AUGUST 17, 2009
July 2009 SCPS2 Scores for Non-Wind Only QSEs
100
90
80
Percent
70
60
50
40
30
20
10
0
41 Passing Non-Wind Only QSEs
0 Failing Non-Wind-Only QSEs
Page 5 of 16
ITEM 4A - COMPLIANCE REPORT
AUGUST 17, 2009
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