The impact of carbon prices on renewable energy support

Jan Abrell and Mirjam Kosch

No 21-048, ZEW Discussion Papers from ZEW - Leibniz Centre for European Economic Research

Abstract: This paper examines how optimal renewable energy (RE) support (RES) policies need to be adjusted to account for carbon prices. We show theoretically and empirically that changing carbon prices requires adjusting RE production subsidies due to two different motives: First, RE premiums need to be reduced to reflect the carbon value embedded in the market price. Second, RE premiums and feed-in tariffs need to be adjusted once a fuel switch away from coal towards gas power occurs. This adjustment is necessary to account for changes in the marginal external benefit of RE. For the case of the UK, we estimate the optimal RE subsidies and their adjustments due to a fuel switch. Furthermore, we use numerical simulations to analyze the impact of varying carbon prices on optimal RES. We show that the necessary adjustment due to a fuel switch is empirically rather small, whereas RE premiums must be phased out with increasing carbon prices due to the increasing reflection of the carbon cost in the electricity market price. Finally, a fuel switch increases solar-induced abatement, whereas it wind-induced abatement is rather invariant to a fuel switch. Yet, the differentiation of RE subsidies between wind and solar power is modest.

Keywords: Renewable promotion; Carbon pricing; Electricity generation (search for similar items in EconPapers)
JEL-codes: Q41 Q42 Q58 (search for similar items in EconPapers)
Date: 2021
New Economics Papers: this item is included in nep-ene, nep-env and nep-reg
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Related works:
Journal Article: The Impact of Carbon Prices on Renewable Energy Support (2022)
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Persistent link: https://EconPapers.repec.org/RePEc:zbw:zewdip:21048

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