FERC 890 1st Quarter Stakeholder Meeting for Transmission Planning

1. 1 FERC 890 1st Quarter Stakeholder Meeting for Transmission Planning Denver, CO March 6, 2009 8:30 a.m. � 11:30 a.m.

2. 2 WELCOME

3. 3 PSCo Planning Process

4. 4 Planning Process Calendar Methodology / Criterion Reporting Regulatory Interaction Colorado Rule 3206 CPCN�s with Colorado PUC

5. 5 Planning Calendar 2009

6. 6 Transmission Map

7. 7 Planning Study Process Prepare Study Models Utilize PSCo Base Case Preparation Process Determine Appropriate WECC Base Cases as basis for Study Verify Study Years, System Conditions, Demand Levels are appropriate Model projected transfers Model appropriate regional loading Include existing and planned facilities Include Reactive Power resources as appropriate Studies Include effects of existing and planned protective systems as appropriate Include effects of existing and planned control devices including load tap changers, switched shunt devices, and generation control as appropriate Include planned or maintenance outages of equipment Methodology Assess performance to meet TPL-001 (N-1) and TPL-002 (N-1) requirements Assess performance to meet TPL-003 (N-2) and TPL-004 (exploratory) as appropriate Develop Recommendations for System Upgrades

8. 8 Methodology Analyses Powerflow (Static) Dynamic (Transient and Voltage Stability) Software GE PSLF Siemens/PTI PSS/E Conditions System Intact (N-0) Single Contingencies (N-1) of All Regional Elements Select N-2 Contingencies Loading Recent Load Forecasts Generally Peak Summer Sensitivities with Peak Winter and Lighter Loading

9. 9 Methodology - Criteria NERC Standards Table 1 TPL-001, 002, 003, 004 TPL � (001 thru 004) � WECC � 1 � CR - System Performance Criteria (Formerly NERC/WECC Criteria) WECC Disturbance-Performance Table of Allowable Effects on Other Systems Other WECC planning criteria including voltage deviation criteria for system response after disturbances was used in the analysis. Specifically, WECC requires that for a single contingency, transient voltage dips cannot exceed 25% at load buses, or 30% at non-load buses, cannot exceed 20% for more than 20 cycles at any load bus, cannot have a post-transient voltage deviation exceed 5% at any bus, and the frequency cannot dip below 59.6 Hz for 6 cycles or more at a load bus. For multiple contingencies, transient voltage dips cannot exceed 30% at any bus and cannot exceed 20% for more than 40 cycles at any load bus, cannot have a post-transient voltage deviation exceed 10% at any bus, and frequency cannot dip below 59.0 Hz for 6 cycles or more at a load bus. The addition of any new generation cannot produce system performance that is out of compliance with the values stated above. WECC planning criteria including voltage deviation criteria for system response after disturbances was used in the analysis. Specifically, WECC requires that for a single contingency, transient voltage dips cannot exceed 25% at load buses, or 30% at non-load buses, cannot exceed 20% for more than 20 cycles at any load bus, cannot have a post-transient voltage deviation exceed 5% at any bus, and the frequency cannot dip below 59.6 Hz for 6 cycles or more at a load bus. For multiple contingencies, transient voltage dips cannot exceed 30% at any bus and cannot exceed 20% for more than 40 cycles at any load bus, cannot have a post-transient voltage deviation exceed 10% at any bus, and frequency cannot dip below 59.0 Hz for 6 cycles or more at a load bus. The addition of any new generation cannot produce system performance that is out of compliance with the values stated above.

10. 10 Reporting � Annual 2009

11. 11 Reporting - Postings Tariff Studies http://www.rmao.com/wtpp/PSCO_Studies.html FERC 890 Information http://www.oatioasis.com/psco/index.html SB07-100 http://www.rmao.com/wtpp/SB100.html High Plains Express http://www.rmao.com/wtpp/HPX_Studies.html WestConnect http://www.westconnect.com/

12. 12 FERC 890 Attachment R Update

13. 13 2008 Filing Responded October 15, 2008 Full Filing: http://www.xcelenergy.com/SiteCollectionDocuments/docs/Xcel-Order890-Comp-Filing-Revision1.pdf Other Information on OASIS: http://www.oatioasis.com/psco/index.html, under FERC 890 Including: Contacts: http://www.oatioasis.com/PSCO/PSCOdocs/PSCo_Att_R_Points_of_Contact-10172008.pdf Hyperlink List: http://www.oatioasis.com/PSCO/PSCOdocs/PSCo_Att_R_Hyperlinks-10172008.pdf Attachment R (K) only: http://www.oatioasis.com/PSCO/PSCOdocs/PSCo_Attachment_R_101508.pdf Meeting Notices and Materials

14. 14 PSCo 2008-2009 studies

15. 15 Transmission Planning Studies Near Term (Capital Budget) Studies Tariff Studies Senate Bill 07-100 High Plains Express 10-Year Plan

16. 16 Annual Capital Budget Assessment Conducted annually Project recommendations developed from transmission reliability studies. Generally divided into regions: Denver/Boulder Foothills Western Colorado Front Range (I-25 Corridor)

17. 17 Planned Project Status ( 5 year plan) Comanche - Daniels Park 345 kV Transmission Project Chambers 230/115 kV Transmission intertie Project Sandown - Leetsdale 115 kV Project Midway - Waterton 345 kV Transmission Project Niwot / Gunbarrel 230 kV Underground Line

18. 18 Comanche - Daniels Park 345 kV Transmission Project

19. 19 Comanche - Daniels Park 345 kV Project

20. 20 Chambers 230/115 kV Transmission Intertie Project

21. 21 Chambers 230/115 kV Transmission Intertie Project

22. 22 Sandown - Leetsdale 115 kV Transmission Project

23. 23 Sandown - Leetsdale 115 kV Transmission Project

24. 24 Midway - Waterton 345 kV Transmission Project

25. 25 Midway - Waterton 345 kV Transmission Project

26. 26 Niwot / Gunbarrel 230 kV Underground Line

27. 27 Niwot/Gunbarrel 230 kV Underground Line

28. 28 FERC Generation Interconnection Process

29. 29 Generation Interconnection Process FERC Orders 2003 and 2006 Order 2003 for Large Generators Greater than 20MW Large Generator Interconnection Process (LGIP) Large Generator Interconnection Agent (LGIA) Applies to all generation technologies Order 2006 for Small Generators Less than or equal to 20MW Small Generator Interconnection Process (SGIP) Small Generator Interconnection Agent (SGIA) Applies to all generation technologies

30. 30 LGI Process Feasibility Study $10,000 deposit Preliminary determination of interconnection and delivery facilities Study Cost based on actual costs Feasibility schedule: 6-9 months System Impact Study $50,000 deposit Proof of Site Control required Transient stability of system is studied Study Cost based on actual costs SIS schedule: 9-12 months Facilities Study $100,000 deposit Detailed engineering design and cost estimates Study cost based on actual costs Facilities Schedule: 2-4 months Study results become the basis for the LGIA

31. 31 Generation Interconnection Process PSCo Interconnection Queue Total Requests since 2003: 81 Total MW: 23,970 Requests by Generation Type: Wind: 52 Solar 10 Coal: 6 Gas: 12 Biomass: 1

32. 32 Active FERC Generation Interconnection Studies (2006-2009) Arapahoe � 587 MW Boone � 500 MW Wind Fort St. Vrain � 300 MW Wind; 256 MW Combined Cycle Green Valley � 400 MW Wind Hartsel � 100 MW Solar Walsenburg � 300 MW Wind Comanche � 700 MW Wind Keensburg � 250 MW Wind Ault � 1600 MW Wind Jackson Fuller � 601 MW Wind Missile Site � 800 MW Wind; 270 MW Gas Lamar � 2686 MW Wind San Luis Valley � 150 MW Wind; 1730 MW Solar Pawnee � 1170 MW Combined Cycle; 2820 MW Wind

33. 33 Senate Bill 07�100 Projects

34. 34 Senate Bill 07-100 Upon recommendations by the 2006 Transmission Task Force on Reliable Electricity Infrastructure, the Sixty Sixth General Assembly passed Senate Bill 07-100. Under SB 07-100, PSCo must meet the following requirements: Designate �Energy Resource Zones (ERZ)� Develop plans for the construction or expansion of transmission facilities necessary to deliver electric power consistent with the timing of the development of beneficial energy resources located in or near such zones Consider how transmission can be provided to encourage local ownership of renewable energy facilities Submit proposed plans, designations, and applications for certificates of public convenience and necessity to the commission for simultaneous review

35. 35

36. 36

37. 37 Proposed SB07-100 Projects Pawnee � Smoky Hill 345 kV Transmission Project San Luis � Calumet � Comanche 230/345 kV Line Missile Site 345 kV Switching Station Lamar � Front Range 345 kV Transmission Project Pawnee � Daniels Park 345 kV Line Ault � Cherokee 230 kV Line Addition Lamar � Vilas 230/345 kV Line

38. 38 Pawnee - Smoky Hill 345 kV Transmission Project

39. 39 San Luis - Calumet - Comanche 230/345 kV Line

40. 40 Missile Site 345 kV Switching Station

41. 41 Lamar - Front Range 345 kV Transmission Project

42. 42 Pawnee - Daniels Park 345 kV Line

43. 43 Ault - Cherokee 230 kV Line Addition

44. 44 Lamar - Vilas 230/345 kV Line

45. 45 Senate Bill 07-100 Schedule 2008 � 2009 Process March 4, 2008: Kickoff Meeting April � July 2008: Transmission Study Groups November 24, 2008: Submit Transmission Plans December 2008: Commission Workshop February 27, 2009. CPCN approved for Pawnee to Smoky 345 kV 2009 CPCN Applications October 31, 2009: Submit Biennial plan http://www.rmao.com/wtpp/SB100.html

46. 46 High Plains Express project

47. 47 High Plains Express Initiative

48. 48 HPX Status MOU for Stage 2 Executed Organizational Structure Defined Executive Committee Work Groups: Commercial, Siting, Technical, Communication Stage 2 Scheduled Completion in 2010

49. 49 10-Year Plan

50. 50 Stakeholder Opportunity for comment into study scope for 10 year assessment

51. 51 Regional (WECC) Update

52. 52 Regional (WECC) Planning Coordination Committee Focus on Reliability Technical Studies Subcommittee System Review Work Group Transmission Expansion Planning Policy Committee Focus on Economic Assessments

53. 53

54. 54 Sub regional Update

55. 55 CCPG Forum for joint transmission planning Recognized WECC Sub-Region Three Open Meetings/Year April, August, December (Joint with SWAT/Sierra) Denver TSGT Offices Multiple Subcommittee and Work Group meetings throughout the year Open to All Interested Stakeholders Meeting Notices/Materials Posted at: www.westconnect.com

56. 56 CCPG Activities Long Range (10-Year) Planning NERC Compliance Senate Bill 100 Sub-subregional Studies WECC Data Coordination Regional Project Participation Charter Purpose of the MOU is to finance 3rd party consultants t do studies We are in the process of evaluating and acquiring a consultant Study Scope is being fully defined Want to adhere to FERC 890 and be as open and transparent as possible. The MOU was written to allow additional participants � paying and non-paying. But, even if an entity does not sign the MOU, the Parties will still welcome input and comments from other Stakeholders Intent is to have a web-site for posting materials, as well as a Q&A section. Purpose of the MOU is to finance 3rd party consultants t do studies We are in the process of evaluating and acquiring a consultant Study Scope is being fully defined Want to adhere to FERC 890 and be as open and transparent as possible. The MOU was written to allow additional participants � paying and non-paying. But, even if an entity does not sign the MOU, the Parties will still welcome input and comments from other Stakeholders Intent is to have a web-site for posting materials, as well as a Q&A section.

57. 57 Next Next CCPG meeting April 23, 2009; Denver TSGT office Notices/Materials Posted at: www.westconnect.com Contacts Thomas Green 303-571-7223 thomas.green@xcelenergy.com Or Jared Griffiths (Co-chair) Phone 970-461-7603 Email jgriffit@wapa.gov Mention that this is the first phase Subsequent phases will address: economics detailed routing Participation Purpose of MOU Mention that this is the first phase Subsequent phases will address: economics detailed routing Participation Purpose of MOU

58. 58 CCPG Long Range Planning Group (CLRGPG) Assessment Purpose: Develop 10 Year Transmission Plans (2018 Models) Consider RPS & up to 30% Renewable Re-evaluate the Eastern Plains Transmission Project Annual assessments include: Assessment Load Flow Analysis Four Scenarios

59. 59 Long Range Scenarios Colorado resources suggested by Utility resource planners Meets or exceeds Colorado�s Renewable Portfolio Standard �Stressed� from South to North Displace some northern CO resource with WY Injected into CO via the proposed Wyoming-Colorado Intertie Project Stressed North to South Up To 5% of the capacity in Colorado�s Wind GDA�s 2000 MW from Colorado�s Central Solar Power GDA�s

60. 60 Scaled Scenario C (Total 2917 MW new)

61. 61 Scenario C � Topology Summary Lamar area to: Comanche 345/500kV (SB100) Big Sandy � Missile Site 345/500kV (SB100) Burlington 345/500kV Burlington - Wray 230kV Pawnee - Smoky Hill � Daniels Park 345kV (SB100) Ault � Cherokee 230kV (SB100)

62. 62 Subregional (WestConnect)

63. 63 Status of WestConnectSubregional Planning Process 2008 Planning Cycle posted on web site 2013 & 2018 Adequacy Assessments( Posted) Coordinated with CCPG 10-Year Study Plan and Report (Posted) Workshop in October Report in January Currently preparing 2009 scope of work Website http://www.westconnect.com/

64. 64 Transmission customers update loads, resources and demand responses

65. 65 Study Request Review

66. 66

67. 67 Stakeholder Questions & Comments

68. 68 4th Quarter meeting Dec 10, 2009

69. 69 Adjourn