2009 Scenario Reliability Assessment - NERC

Regional Reliability Scenario Self-AssessmentsDataGroupingGeneratingResourcesKey Assumptions The generating resources are assigned to bubbles and buses based on theprevious SSG-WI data and the new power flow data. The categoryassignments are used to group the generators by similar operatingcharacteristics, which are mainly derived from public sources.Existing resources In accordance with the L&R definitions existing resources are resourcesassumed to be online by 12/31/2006. These resources were identifiedthrough the SSG-WI 2005, WECC L&R, WECC power flow case, EIA,and other data bases. The stakeholders were invited to review the list ofresources and capacities, and their comments are included to the extentpossible. Generating resource capacities are based on the power flow caseor other sources. Thermal unit capacities are net of station service. Net togrid generation of cogeneration resources is not explicitly modeled exceptin Alberta. This is an area of improvement.Incremental resources Incremental resource data collected for the L&R process (used to collectthe LTRA data) was used to update the TEPPC data Incremental resources are resources expected to be placed in servicebetween 2007 and the 2017 (inclusive).RPS resourcesThe Studies Work Group determined the required RPS generation foreach RPS State to meet the respective State requirement for 2017.Assumptions were made for discounts and conversions between energyand capacity. Where there were insufficient renewable resources in theexisting and incremental generation, in either the RPS or Scenario Cases,generic RPS resources were added. Table 4 in section 8 details theseresources by type and location.2009 Scenario Reliability Assessment Page 161