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Electricity market-clearing prices and investment incentives: the role of pricing rules

I. Herrero, P. Rodilla, C. Batlle

Pricing rules in wholesale electricity markets are usually classified around two major groups, namely linear (aka non-discriminatory) and non-linear (aka discriminatory). As well known, the major difference lies on the way non-convexities are considered in the computation of market prices. According to the classical marginal pricing theories, the resulting market prices are supposed to serve as the key signals around which capacity expansion revolves. Thus, the implementation of one or the other pricing rule can have a different effect on the investment incentives perceived by generation technologies, affecting the long-term efficiency of the whole market scheme. The objective of this paper is to assess to what extent long-term investment incentives can be affected by the pricing rule implemented. To do so, we propose a long-term capacity expansion model where investment decisions are taken based on the market remuneration. We use the model to determine the optimal mix in a real-size thermal system with high penetration of renewable energy sources (since its intermittency enhances the relevance of non-convexities), when alternatively considering the aforementioned pricing schemes.


Palabras clave: Electricity market design; Marginal pricing; Long-term capacity expansion


Energy Economics. Volumen: 47 Páginas: 42-51

Índice de impacto JCR y cuartil Scopus: JCR impact factor: 2.862 (2015); 4.151 (2018).

Referencia DOI: DOI icon 10.1016/j.eneco.2014.10.024    

Publicado en papel: Enero 2015. Publicado on-line: Noviembre 2014.



Cita:
I. Herrero, P. Rodilla, C. Batlle. Electricity market-clearing prices and investment incentives: the role of pricing rules. Energy Economics. vol. 47, pp. 42-51, Enero 2015. [Online: Noviembre 2014]


    Líneas de investigación:
  • *Diseño y regulación de mercados energéticos

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