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Investment in electricity capacity under fuel cost uncertainty: Dual-fuel and a mix of single-fuel technologies

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  • Gal, Nurit
  • Milstein, Irena
  • Tishler, Asher
  • Woo, C.K.

Abstract

We study the effect of the price and price volatility of natural gas on investment in electricity capacity in two technology scenarios: (1) dual-fuel units that use natural gas and diesel; and (2) a mix of single-fuel plants that use coal or natural gas. We develop a two-stage (capacity and operation) model and derive analytical solutions for both scenarios. Based on the observed log-normal distribution of the natural gas price, we show that optimal capacity investment increases moderately with natural gas price volatility, countering a commonly held view that fuel cost uncertainty tends to discourage capacity investment. Thus, higher volatility of the natural gas price tends to reduce the 'missing money' problem. We use Texas data to show that higher gas price volatility implies higher profits and consumer surplus in the first scenario, even when the per MWh diesel cost is much higher than the expected value of the per MWh gas cost. In the second scenario, firms invest only in gas capacity, unless the per MWh coal cost is significantly below the expected per MWh gas cost, thus explaining the popularity of gas generation.

Suggested Citation

  • Gal, Nurit & Milstein, Irena & Tishler, Asher & Woo, C.K., 2019. "Investment in electricity capacity under fuel cost uncertainty: Dual-fuel and a mix of single-fuel technologies," Energy Policy, Elsevier, vol. 126(C), pages 518-532.
    • Handle: RePEc:eee:enepol:v:126:y:2019:i:c:p:518-532
    DOI: 10.1016/j.enpol.2018.10.040
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    More about this item

    Keywords

    D24; D43; L11; L94; L95; Natural gas price volatility; Investment under uncertainty; Capacity mix; Dual-fuel plants; Electricity price behavior;
    All these keywords.

    JEL classification:

    • D24 - Microeconomics - - Production and Organizations - - - Production; Cost; Capital; Capital, Total Factor, and Multifactor Productivity; Capacity
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
    • L94 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Electric Utilities
    • L95 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Gas Utilities; Pipelines; Water Utilities

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