2. Status Update for Reliability/Market Power Mitigation Assessment
Stakeholder Meeting
April 16, 2008
Austin, TX

3. Reliability & Market Power Mitigation Study Model : Status Update
Data collection effort in process
SPP has received most of the input from ETI with two conference calls to discuss the data
Last set of data was recently received by ETI
(SPP is still reviewing it)
Study case will be ready by April end (Reliability Study) and by May end (MP Mitigation Study) for stakeholder review

4. Reliability Study Model : Key Inputs
Generation Inputs
Two new generating plant to serve ETEC load (150 MW each) at Cypress and Jacinto
Cottonwood plant will be considered in Eastern Interconnect
Sensitivity to be run with Cottonwood connecting into ERCOT
Transmission Inputs
ETI’s construction plan
STEP plan ( ) approved by SPP BOD
Transactions (Interchange)
Latest transactions (interchange) for 2012 based on ETI and SPP’s OASIS
Only Long-term Firm transactions will be considered

5. Reliability Study Process : Key Inputs
SPP-ETI Transfer Scenario
Units in SPP footprint are ramped up based on reserve capacity
Units in ETI will be backed down based on heat rate characteristics
RMR units in ETI will be backed down when other units reach their minimum limit
Units not owned/operated by ETI will not backed down
Contingencies Examined
Breaker to Breaker in ETI
100 kV and higher outside ETI
100 kV and higher in SPP
Monitored Transmission Facilities
100 kV and above in SPP, ETI and Rest of Entergy
Interfaces, identified flowgates

6. Market Power Mitigation Study : Key Inputs
The latest version of PROMOD IV with 6 digit bus numbers will be used
Generation Details
ETI : Publicly available data based on typical characteristics
SPP: Actual Data as provided by SPP members
RMR details will be modeled using Proxy approach (key interfaces, flowgates)
Typical Load shape will be used for ETI for hourly load forecast in study year (2012)
Fuel price data and other inputs will be coordinated with ERCOT for consistency

7. Time Line Final input data will be ready by April end
Study Models Finalized
Reliability Assessment Study Model : April 2008
MP Mitigation Assessment Study Model : May 2008
Preliminary Results Expected
Reliability Assessment : July 2008
MP Mitigation Assessment : September 2008

8. Questions?

9. Mak Nagle Manager, Technical Studies and Modeling 501-614-3564 mnagle@spp.org