Demand Integration Update to DSWGERCOT Emergency Responsive Service (ERS)

Report to the Public Utility Commission of Texas for the 2013 ERS Program Year

Project No. 27706

Attachment B

Contents

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Procurement Summary• Capacity (MW) offered and procured• Number & Average Size of ERS-10 Resources• Cumulative Individual Sites Participating in ERS-10

Suspensions Due to Availability or Load Test Failures

Settlement Summary

Detailed procurement results by Standard Contract Term

Fleet Level Summary for January 6, 2014 EEA Event

Standard Contract Terms & Time Periods

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ERS is procured 3 times annually for 4-month Standard Contract Terms• February through May• June through September• October through January

Participants may offer to provide ERS for one or more Time Periods:• Business Hours 1: 8AM to 1PM Monday-Friday* • Business Hours 2: 1PM to 4PM Monday-Friday* • Business Hours 3: 4PM to 8PM Monday-Friday* • Non-Business Hours: All other hours

*Except ERCOT Holidays

Time Periods are designed to allow flexibility for customers during traditional business hours

Time Periods have been in effect in current form since the June-September 2008 EILS Contract Period

ERS-10 Capacity Procurement Trends (Business Hours 1)

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ERS-10 Capacity Procurement Trends (Business Hours 2)

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ERS-10 Capacity Procurement Trends (Business Hours 3)

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ERS-10 Capacity Procurement Trends (Non-Business Hours)

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Procurement Trends (number & avg. size of Resources)

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Cumulative Individual Sites Participation

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Suspension History

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ERS Resources suspended during the 2013 program year due to availability failures, two consecutive load test failures, or event failures

• Suspended Resources may regain eligibility only after submitting a corrective action plan and successfully completing a load-shed test administered by ERCOT

Settlement Summary

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*Adjustments may be made for the following reasons: availability, event performance, disputes, data corrections.

Standard Contract

Term

Projected cost based on procurement

Initial Cost* Final Cost* Final % of original

FebMay11 7,703,107.30$ 6,581,603.30$ 6,643,557.73$ 86.2%AprMay11 1,110,406.64$ 1,091,783.88$ 1,091,783.88$ 98.3%JunSep11 7,748,302.46$ 6,780,901.29$ 6,780,901.29$ 87.5%

Oct 11Jan12 8,731,702.58$ 8,364,694.14$ 8,364,694.14$ 95.8%Total 2011 25,293,518.97$ 22,818,982.61$ 22,880,937.04$ 90.5%FebMay12 $8,903,726.90 8,903,726.90$ 8,832,429.67$ 99.2%JunSep12 $11,621,720.72 11,278,038.52$ 11,278,038.52$ 97.0%

Oct12Jan13 $10,246,067.12 10,245,657.90$ 10,245,657.90$ 100.0%Total 2012 30,771,514.74$ 30,427,423.32$ 30,356,126.09$ 98.7%FebMay13 9,646,584.83$ 9,617,304.07$ 9,617,304.07$ 99.7%JunSep13 12,042,160.83$ 12,042,160.85$ N/A

Oct13Jan14 12,744,451.58$ N/ATotal 2013 34,433,197.24$ N/A N/A N/A

Demand Integration Update to DSWG

2013 Results by Standard Contract Term

February-May 2013 Standard Contract Term

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Total Adjusted Cost for this Standard Contract Term: $ 9,617,304.07

June-September 2013 Standard Contract Term

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Total Adjusted Cost for this Standard Contract Term: $ 12,042,160.85

October 2013-January 2014 Standard Contract Term

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Total Projected Cost for this Standard Contract Term: $ 12,744,451.58

Demand Integration Update to DSWG

Summary for January 6, 2014 EEA Event

January 6, 2014 EEA Event Timeline

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7:07:27 VDI-Deploy

All ERS 10 minute Resources were issued a simultaneous verbal deployment instruction (495.72 MW, 398 Resources, 649 Sites)

7:53:16 VDI-Recall All ERS 10 Resources were issued simultaneous verbal recall instruction

Time sequence on January 6, 2014 Deployment Event for ERS-10

Fleet Level Performance for 1/6/2014 Event

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Report18

• Graph is based on 15-minute interval data. • Performance is based on a prorated obligation for the 1st partial interval and one full interval. • 1 Resource had prescheduled unavailability from HE0900 - 1600 on the day of the event (14.6 MWs)

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This document is provided for informational purposes only.  Procurement and settlement data are subject to revision.