2009 Scenario Reliability Assessment - NERC

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Scenario LetterScenario LetterDecember 23, 2008REGIONAL MANAGERSTRE — Larry Grimm RFC — Timothy R. GallagherFRCC — Sarah Rogers SERC — Gerry CauleyMRO — Daniel P. Skaar SPP — Charles H. YeungNPCC — Edward A. Schwerdt WECC — Louise McCarrenDear Regional Managers:2009 Scenario Reliability Assessment Data RequestThe NERC Reliability Assessment Subcommittee (RAS) is requesting your assistance to assess the reliability ofyour Region. Based on NERC’s Planning Committee direction, your Region provided a Scenario Study Outline in2008 for one Scenario Case to be performed in 2009. These outlines were approved at the Planning committee’sJune 2008 meeting, and the studies have commenced thereafter.NERC requests you send the data and results of this Regional Scenario Case assessment electronically in theattached Excel spreadsheets by May 1, 2009 and the written Regional assessment narrative by June 15, 2009 tojohn.moura@nerc.net, with copy to me at mark.lauby@nerc.net. Data and responses to the narrative questions (SeeAttachment I, which includes the draft schedule) should be as complete and accurate as possible based on availableinformation as of the time of the submittal. The questions should be answered in the way that your Region,subregion, and/or province consider these items in its reliability assessment. Background of this Scenario Caseanalysis request and summary of responses from each Region is found in Attachment II.Additionally, a few specifics: Use the same capacity definitions for both the Scenario Case and Reference Case (whether the 2008or 2009 LTRA Reference Case is used). Ensure that comparison of resources can be made with theselected Reference Case by using the same capacity and demand categories for both cases.Do not change the questions when seeking input from stakeholders of your Region.Annotate your responses to the attached questions for easy identification by the peer reviewers. Theseannotations will be removed in the final report. Respond to all questions, and, if appropriate, explain whythe response to the question is “not applicable.” Follow the Reliability Assessment Narrative Format Guide provided separately. To improve the consistentlook and feel of the report, please do not copy and paste tables/charts, rather re-develop these materialsensuring the suggested templates are followed.Please contact us with any questions. On behalf of the Planning Committee and the Reliability AssessmentSubcommittee, we wish to thank you for your support of NERC’s reliability assessments.Sincerely,Mark G. LaubyManager, Reliability AssessmentsMGL:igAttachmentscc: John Moura, Technical Analyst, NERC Reliability AssessmentsReliability Assessment SubcommitteePlanning CommitteeData Coordination Working Group2009 Scenario Reliability Assessment Page 183
Scenario LetterScenario Letter: Attachment IScenario NarrativeScenario Reliability Assessment ScheduleReliability Assessment Subcommittee has set the schedule below:2009December 22 Scenario Data and Narrative Request sent to Regional EntitiesMay 1June 15July 10July 22-23August 15SeptemberSept 24October 1Scenario data due to NERCRegional Assessment narrative due to NERCDraft Report sent to RASRAS Peer Review Scenario Case comparisonDraft to RASDraft to PC and MRC for reviewFinal draft to NERC Board of TrusteesTarget release and electronic publication of reportBackgroundDevelopment of a small set of Scenario Cases for comparison to a Reference Case is anextremely valuable way to understand the robustness of the Reference Case and to studypotential Scenario Case impacts on bulk power system reliability.The goal of the 2009 Scenario Narrative is to provide insights on the impacts of significantchanges in system characteristics and reliability. The Regional/subregional responses, therefore,should compare the results of the 2008 or 2009 ten-year Scenario (here forward call the ScenarioCase) and the 2008 or 2009 LTRA ten-year Reference Case (here forward call the ReferenceCase). The narrative outline and questions in this Attachment form the foundation for theRegional/subregional response to these comparisons. The background for this Scenario Analysisand summary of responses from each Region is found in Attachment II.Regional Scenario Self AssessmentPrepare a written assessment for your Region discussing any situations that could affectreliability for the next ten years — the write-up should be submitted in Microsoft Word format,following the Reliability Assessment Narrative Format-Guide, attached separately. To improvethe consistent look and feel of the report, please do not copy and paste tables/charts from otherreports, rather re-develop these materials ensuring the suggested templates are followed.Each Region is requested to include the specific information covered in the sections below. Ifyour Regional self-assessments are divided into subregions, the subregion assessments shouldaddress each of these sections and questions individually, with the overall Regional selfassessmentproviding a high level overview. Consistent responses representing all subregions canbe provided at the Regional level.Page 1842009 Long-Term Reliability Assessment
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2009 Scenario Reliability Assessment - NERC

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