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Resource Categories SERC collects projections for existing and planned capacity and net capacity transfers (between subregions) that will be available during the forecast hour of peak demand for the summer and winter seasons of each year. Resource planning methods vary throughout the Region. SERC uses the following categories to provide a consistent approach for collecting and presenting resource adequacy: Resource Type Anticipated Prospective Existing-Certain Generating Capacity Includes operable capacity expected to be available to serve load during the peak hour with firm transmission √ √ Existing-other capacity Includes operable capacity that could be available to serve load during the peak hour, but lacks firm transmission and could be unavailable during the peak or a number of reasons √ Tier 1 Capacity Additions Includes capacity that is either under construction or has received approved planning requirements √ √ Tier 2 & Tier 3 capacity additions Includes capacity that has been requested but not received approval for planning requirements √
Firm Capacity Transfers (Imports Minus Exports) Includes transfers with firm contracts
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√
Expected (nonfirm) Capacity Transfers (Imports Minus Exports) Includes transfers without firm contracts, but a high probability of future implementation Confirmed Retirements Generators that have formally announced retirement plans. These units must have an approved generator deactivation request where applicable.
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√
√
Unconfirmed Retirements Capacity that is expected to retire based on the result of a subregion generator survey or analysis. √ *Note blank cells indicate the resource type is not within the specified category. Whereas, a √ indicates the resource type is a part of this category.
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