2009 Scenario Reliability Assessment - NERC

More documents

Recommendations

Info

Scenario Reliability Self-Assessmentsmaturing. It is anticipated that the VGS would serve as the central point of facilitation for studyof renewable issues in the Western Interconnection.In addition to study activity in the Western Interconnection, there have been a number of pilotprograms and operational changes to facilitate the integration of variable generation. Theseinclude balancing cooperation agreements between BAs, ancillary service agreements, andchanges to transmission tariffs. Two examples of these are described below.The ACE Diversity Interchange (ADI) is an example of BA cooperation to reduce the impacts ofvariable generation. It provides a mechanism for BAs to share their variability, which reduces thelevel of generation changes required by each entity. There are currently 16 BAs in the WesternInterconnection participating in this activity. For the entities involved, participation has beenshown to reduce balancing costs and improve NERC Control Performance Standard (CPS2)scores.The Joint Initiative is a voluntary joint project sponsored by ColumbiaGrid, Northern TierTransmission Group, and WestConnect. Collectively, these three Regional planning groupscover most of the two non-ISO areas of the Western Interconnection. In addition, the project hasmany participants among WECC member utilities, merchants, and stakeholders. The goal of theJoint Initiative is to tap into the existing flexibility that exists within the WesternInterconnection. The Joint Initiative is recommending changes to Transmission Service Providerbusiness practices to: Facilitate within-hour transmission purchase and scheduling.Develop tools to facilitate within-hour bilateral transactions.Develop a dynamic scheduling system consisting of standard protocols andcommunication infrastructure that would allow access to resources across multiple BA’s,subject only to transmission constraints.Operational issues vary significantly depending on the size of the BA, the mix of generation,penetration of wind, geographic dispersion of wind, market structure, and performance of windplants. There are many and varied methods to mitigate the reliability and operational impacts ofvariable generation. However, these methods all focus on reducing the uncertainty of variablegeneration and accessing flexibility in the existing generation. This can be accomplishedthrough: Larger balancing areas (actual or virtual) Better wind forecasting Geographically dispersing wind generation over a larger area Increasing the amount of flexible generation (ramping capability) Ability to access flexible generation, including bi-lateral agreements between utilities ormarkets Rules and technology that allow for operational flexibility in near real-time throughdynamic scheduling, intra-hour re-dispatch, and ancillary service markets2009 Scenario Reliability Assessment Page 157
Scenario Reliability Self-AssessmentsAt high levels of variable generation — specifically wind — it is possible that ramp controls orgeneration caps may be necessary. The extent to which ramp or other operational limits arenecessary would depend in large part on the other mitigation methods detailed above,transmission system additions, and the future technologies that enable more flexibility in theload.Fuel Use ImpactsFigure 3 below shows the fuel use changes between the base case, which had approximately 8.8percent renewables penetration and the 15 percent Scenario Case. As might be expected, themajor change in fuel usage with the inclusion of large amounts of generation with low-to-zerovariable cost is a decrease in gas usage. Gas generation is generally on the margin in the WesternInterconnection.Figure WECC-3FUEL USE CHANGES FROM RPS CASE TO 15 percent SCENARIO CASEPage 1582009 Scenario Reliability Assessment
Page 1 and 2:
2009 Scenario ReliabilityAssessment
Page 3 and 4:
Table of ContentsTable of ContentsN
Page 5 and 6:
Executive SummaryTransmission Criti
Page 8 and 9:
Background Information for this Rep
Page 10:
Scenario Reliability Assessment Sum
Page 13 and 14:
Scenario Reliability Assessment Sum
Page 16 and 17:
Scenario Reliability Self-Assessmen
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111: Scenario Reliability Self-Assessmen
Page 164 and 165: Regional Reliability Scenario Self-
Page 180 and 181: About This Reporto Nuclear scenario
Page 182 and 183: Joint Coordinated System PlanThemat
Page 184 and 185: Joint Coordinated System Plan2009 S
Page 186 and 187: Scenario LetterScenario LetterDecem
Page 188 and 189: Scenario LetterIn an effort to add
Page 190 and 191: Scenario Letterd) Provide a table,
Page 192 and 193: Reliability Assessment Subcommittee
Page 194 and 195: Reliability Assessment Subcommittee
Page 196: the reliability of theto ensurebulk
show all

2009 Scenario Reliability Assessment - NERC

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?