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Guide to IPM Input and Output Files

DAT file: Once decompressed, this file will have a "DAT" filename extension, e.g., Base Case 2006.dat. It contains the key input set-up data used to define the model run, including the definitions and specifications for run years, model regions, model plants, financial parameters, available fuels, and power system transmission and operating parameters.

System Summary Report: These outputs are available in either spreadsheet or document format, e.g., Base Case 2006.xls and Base Case 2006.pdf. They both contain system-wide results for all run years. Topics reported include projections of generation, capacity, capacity additions and changes, capacity factors, production costs, emissions, and allowance prices. Disaggregation by model plant type categories are provided for the first five of these topics. The model plant types are differentiated by fuel used (e.g., coal, oil/gas, nuclear, hydro), combustion technology (e.g., turbine, combined cycle gas), control technology (e.g., scrubber, post-combustion NOx control), and retrofit structure (e.g., coal plant with existing SNCR retrofit with ACI).

RPE file: Once decompressed, this file will have a "RPE" filename extension, e.g., Base Case 2006.rpe. For each model plant, this file shows the projections of fuel consumption, emissions (rates and tonnage), capacity, costs (capital, fixed operations and maintenance, and variable operations and maintenance), and generation. The model plant results are grouped by model plant type within model regions within model run year. Aggregated results are reported (a) for each model region differentiated by plant type, (b) for each plant type differentiated by model region, (c) for model regions without consideration of plant type, and (d) for plant types without consideration of model region.

CAR file: This file will have a "CAR" filename extension, e.g., Base Case 2006.car. This file contains capacity utilization projections for each model plant grouped by model plant type. Included are capacity contributed to reserve margins, capacity dispatch, and summer, winter, and annual generation, capacity factors, and availabilities. The capacity dispatch column in this file indicates the total capacity (in megawatts) that the model plant represents. The average size of a unit that the model plant represents is found in the DAT file and is the size used for cost assignment (e.g., to determine the applicable economies of scale when retrofitting existing units with emission controls).

TAC file: This file will have a "TAC" filename extension, e.g., Base Case 2006.tac. The file contains annual production costs for each model plant grouped by model plant type. For each model plant, total and rate-based capital, fixed operations and maintenance (FOM), variable operation and maintenance (VOM), and fuel costs are shown. The variable costs reported for model plants in this file can provide insights into why the utilization rates reported for some plants in the CAR file are higher than those of other model plants in the same region.

The DAT, RPE, CAR, and TAC files can be reviewed using a text viewer or text editor such as WordPad.

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