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IPM Overview

The Integrated Planning Model (IPM) is a tool used by the EPA for policy analysis in the electric power sector. It provides a least-cost solution for meeting electricity demand while considering various constraints and variables. The model covers existing, planned, and potential units, as well as relevant technologies and environmental controls. Financial assumptions and factors affecting financing are also considered to provide a comprehensive analysis.

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IPM Overview

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  1. IPM Overview Elliot Lieberman U.S. Environmental Protection Agency Washington, D.C. 20460

  2. Documentation on Web www.epa.gov/airmarkets/epa-ipm

  3. What is IPM? • The Integrated Planning Model (IPM) is a tool developed by ICF Consulting and used by EPA for policy analysis. • IPM is a long-term capacity expansion and production costing model for analyzing the electric power sector. • It is a multi-regional, deterministic, dynamic linear programming model. • IPM finds the least-cost solution to meeting electricity demand subject to environmental, transmission, fuel, reserve margin, and other system operating constraints.

  4. Linear Program Advantages • Finds optimal solution • Comprehensive, integrated approach • Bottom-up detail • Allows fine grain parameter variations • Analysis based on detailed disaggregate information

  5. Electricity Demand Constraints Reserve Margin Constraints Environmental Constraints Transmission Constraints Fuel Constraints Other Operational Constraints Model plants Existing Units Planned/Committed Units Potential Units Retrofit options Repowerings and retirements Typical IPM Constraints and Variables 140,225 Constraints 1,980,251 Variables (x load segments x coal or fuel types x run years x seasons)

  6. Model Regions

  7. Reserve Margin Assumptions Reserve margin is a measure of the system’s generating capability above the amount required to meet peak load requirements. Planning Reserve Margins

  8. Generating Resources • Existing units • Planned/committed units • New potential units that the model can build • Repowerings, relicensings, and retirements Categories represented

  9. Pulverized Coal Integrated Gasification Combined Cycle Combined Cycle Combustion Turbine Nuclear Biomass Gasification Combined Cycle Wind Solar Geothermal Landfill gas Fuel cells Potential Units

  10. SO2 Scrubbers Limestone Forced Oxidation (LSFO) Magnesium Enhanced Lime (MEL) Lime Spray Dryer (LSD) NOx Post-Combustion Controls Selective Catalytic Reduction (SCR) Selective Non-catalytic Reduction (SNCR) Gas Reburn Mercury Removal Activated Carbon Injection (ACI) By-product of SO2, NOx, and particulate controls Other Combustion Optimization Biomass cofiring Emission Control Technologies

  11. First Stage Retrofit Assignment Scheme in EPA Base Case 2000

  12. Run Year Mapping in EPA Base Case 2000

  13. Model Plant Aggregation

  14. Categories Used in Aggregation Scheme • Model Region • Unit Technology Type • Fuel Demand Region • Environmental Regulations • NOx SIP Call Participation • State Specific Regulations in CT, MO and TX • State • Texas • Connecticut • Missouri • Unit Configuration • Boiler Type • Firing Type • SO2 Pollution Control • NOx Pollution Control • Particulate Matter Control • Heat Rate • Low Efficiency Group • Mid Efficiency Groups • High Efficiency Group • Size • Coal Steam Units • Less than 25 MW • From 25 MW to less than 100 MW • 100 MW or greater • Non-coal fossil units and other non-coal emitting units • Less 25 MW • 25 MW or greater

  15. Typical Model Plants

  16. Financial Assumptions

  17. Financial Assumptions • Discount Rate • Represents the time value of money • Allows for inter-temporal analysis • Capital Charge Rate • Allows annualized capital payments to be calculated for an investment

  18. Discount Rate Key parameters considered: • Capital structure • Pre-tax debt rate • Post-tax equity rate

  19. Capital Charge Rate Key parameters considered: • Capital structure • Pre-tax debt rate (or interest cost) • Debt life • Post-tax return on equity • Taxes and insurance • Depreciation schedule • Book life

  20. Factors Affecting the FinancingOf Different Technologies • Risk profile • Medium risk • High risk • Financing scheme • Project financing • Corporate financing

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