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Mean-Variance optimization of power generation portfolios under uncertainty in the merit order

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Author Info

  • Malte Sunderkötter

    ()

  • Christoph Weber

    ()
    (Chair for Management Sciences and Energy Economics, University of Duisburg-Essen)

Abstract

In this article we discuss welfare-optimal capacity allocation of different electricity generation technologies available for serving system demand. While the classical peak load pricing theory derives the efficient portfolio structure from a deterministic marginal production cost curve ("merit order"), we investigate in particular the implications of possible reversals in the merit order —sometimes also referred to as fuel switch risks- induced by uncertain operating costs. We propose a static, non-convex optimization model combining the classic peak load pricing model with elements of mean-variance portfolio (MVP) theory and analytically discuss possible solution cases and important optimality properties. We examine the approach in a case study on the efficient structure of generation portfolios consisting of CCGT and hard coal technologies in Germany. With special emphasis, we study the emergence of overcapacities (exceeding maximal demand) in efficient portfolios and show that diversification is not beneficial per-se. The results show that the efficient technology mix may be significantly impacted by a risk for reversals in the merit order. Therefore, our findings support the importance of considering this risk factor especially with long-term investment horizons. The model is applicable to various investment problems related to production of nonstorable goods under price uncertainty of input factors. Similar problems can e.g. be found in transportation systems or in the process industry.

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File URL: http://www.wiwi.uni-due.de/fileadmin/fileupload/BWL-ENERGIE/Arbeitspapiere/RePEc/pdf/wp1105_PortfolioOptimizationWithReversalRisk.pdf
File Function: First version, 2011
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Bibliographic Info

Paper provided by University of Duisburg-Essen, Chair for Management Science and Energy Economics in its series EWL Working Papers with number 1105.

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Length: 30 pages
Date of creation: Oct 2011
Date of revision: Oct 2011
Handle: RePEc:dui:wpaper:1105

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Web page: http://www.ewl.wiwi.uni-due.de
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Related research

Keywords: power plant investments; peak load pricing; mean-variance portfolio theory; fuel mix diversification;

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