2009 Scenario Reliability Assessment - NERC

Scenario Letterd) Provide a table, sorted by subregion, of significant transformer additions required tosupport bulk power reliability under this Scenario Case:Transformer Project NameHigh-SideVoltage(kV)LowSideVoltage(kV)InserviceDate(s)Description/Statuse) Provide a listing of any other significant substation equipment (i.e. SVC, FACTScontrollers, HVdc, etc.) additions that are different than the Reference Case.5. Operational Issues (Known or Emerging)Are there are potential operating issues different from the Reference Case which mayimpact reliability during the next ten years? Would you expect additional operating guidesand/or changes in interface limits resulting from this Scenario Case?6. Reliability Assessment AnalysisDescribe the assessment process for the Scenario Case used by the Region and subregions.(Cite reports documenting the studies in a footnote or reference).a) Compare the projected capacity margins between the Scenario Case and the ReferenceCase. Also, compare them to the Regional, subregional, state, or provincialrequirements.i) If applicable, do the assumptions change between the two cases to establishthe Regional/subregional capacity margin criteria or target margin level?ii) Does the amount of resources internal to the Region or subregion that isrelied on to meet the criteria, target margin level, or forecast load for theassessment period change when compared to the Reference Case?iii) Does the amount of resources external to the Region/subregion that relied onto meet the criteria, capacity margins, target margin level or forecast loadfor the assessment period change when compared to the Reference Case?iv) If performed, describe the resource adequacy studies (i.e. Loss-of-LoadExpectation, Expected Unserved Energy, etc.) for the Scenario Case.v) Discuss how resource adequacy changes between the Scenario Case and theReference Case.vi) Compare the resource adequacy of the Scenario Case and Reference Case ifpeak demands are higher than the 50/50 demand forecast in the ReferenceCase.b) Compare unit retirements between the two cases and any potentially significant impacton reliability. What measures would have to be taken to mitigate the reliabilityconcern?c) Is there any difference in deliverability of resources between the Scenario Case andReference Case? What might have to be done to ensure that the resources aresufficient and deliverable to meet your load requirements at the time of system peak?d) If you are assuming substantial increase in wind penetration, how would you plan toaddress reactive and frequency response support requirements during ramping andwind variations.2009 Scenario Reliability Assessment Page 187