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Incentive Effects of Environmental Adders in Electric Power Auctions

James B. Bushnell and Shmuel S. Oren

Year: 1994
Volume: Volume15
Number: Number 3
DOI: 10.5547/ISSN0195-6574-EJ-Vol15-No3-4
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Abstract:
We make a systematic examination of the options for incorporating environmental adders into auctions for non-utility generation. To date, adders have been a popular tool of some regulators for the planning process, but have not been embraced as a tool for operations. We argue that any rational implementation of adders into a competitive acquisition process will have at least an indirect effect on the operations of the resulting electric system. If adders are to be employed, regulators must therefore be comfortable enough with them to use them explicitly in both the operation and selection of generation resources.



The Efficiency of Multi-Unit Electricity Auctions

Wedad Elmaghraby and Shmuel S. Oren

Year: 1999
Volume: Volume20
Number: Number 4
DOI: 10.5547/ISSN0195-6574-EJ-Vol20-No4-4
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Abstract:
Using a complete information game-theoretic model, we analyze the performance of different electricity auction structures in attaining efficiency (i. e., least-cost dispatch). We find that an auction structure where generators are allowed to bid for load "slices" outperforms an auction structure where generators submit bids for different hours in the day.



Netting of Capacity in Interconnector Auctions

Felix Hoffler and Tobias Wittmann

Year: 2007
Volume: Volume 28
Number: Number 1
DOI: 10.5547/ISSN0195-6574-EJ-Vol28-No1-6
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Abstract:
Scarce interconnector capacities are a severe obstacle to transregional competition and a unified market for electricity in the European Union. However, physically the interconnectors are rarely used up to capacity. This is due to the fact that the current allocation schemes make only limited use of the fact that currents in opposing directions cancel out. We propose a �netting� auction mechanism which makes use of this and in which even small transmission capacities can generate large competitive pressure in adjacent markets. Netting increases the usage of capacity and reduces the auctioneer�s incentive to withhold capacity from the auction.



Nuclear Capacity Auctions

Sven-Olof Fridolfsson and Thomas P. Tangeras

Year: 2015
Volume: Volume 36
Number: Number 3
DOI: 10.5547/01956574.36.3.sfri
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Abstract:
We propose nuclear capacity auctions as a means to correcting the incentives for investing in nuclear power. In particular, capacity auctions open the market for large-scale entry by outside firms. Requiring licensees to sell a share of capacity as virtual power plant contracts increases auction efficiency by mitigating incumbent producers' incentive to bid for market power. A motivating example is Sweden's policy reversal to allow new nuclear power to replace old reactors.



UK Electricity Market Reform and the Energy Transition: Emerging Lessons

Michael Grubb and David Newbery

Year: 2018
Volume: Volume 39
Number: Number 6
DOI: 10.5547/01956574.39.6.mgru
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Abstract:
The 2013 Electricity Market Reform (EMR) was a response to the twin problems of securing efficient finance for a new generation of low carbon investments, and delivering reliability along with a growing share of renewables in its energy-only market. Four EMR instruments combined to revolutionize the sector; stimulating unprecedented technological and structural change. Competitive auctions for both firm capacity and renewable energy have seen prices far lower than predicted and the entry of unexpected new technologies. A carbon price floor displaced coal, whose share fell from 46% in 1995 to 7% in 2017, halving CO2. Renewables grew from under 4% in 2008 to 22% by 2017, projected at 30+% by 2020 despite a political ban on onshore wind. Neither the technological nor regulatory transitions are complete, and the results to date highlight other challenges, notably to transmission pricing and locational signals. EMR is a step forwards, not backwards; but it is not the end of the story.



Efficient Renewable Electricity Support: Designing an Incentive-compatible Support Scheme

David Newbery

Year: 2023
Volume: Volume 44
Number: Number 3
DOI: 10.5547/01956574.44.3.dnew
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Abstract:
Most existing renewables support schemes distort location and dispatch decisions. Many impose unnecessary risk on developers, increasing support costs. Efficient policy sets the right carbon price, supports capacity not output, ensures efficient dispatch and location. The EU bans priority dispatch and requires market-based bidding, but does not address the underlying problem that payment is conditional on generation, amplifying incentives to locate in windy/sunny sites. This article identifies the various distortions and proposes an auctioned contract to address location and dispatch distortions: a financial Contract for Difference (CfD) with hourly contracted volume proportional to local renewable output/MW, with a life specified in MWh/MW, with long-term transmission contracts based on predicted output-weighted actual or simulated nodal prices. This yardstick CfD delivers efficient dispatch. It assures but limits the total subsidy. It does not over-pay for windy/sunny sites. The revenue assurance allows high debt:equity, dramatically lowering the subsidy cost.



Auctions for Renewables: Does the Choice of the Remuneration Scheme Matter?

Ali Darudi

Year: 2023
Volume: Volume 44
Number: Number 6
DOI: 10.5547/01956574.44.6.adar
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Abstract:
Auctions are increasingly used to support renewable energy sources (RES). The choice of the remuneration scheme is one of the major design challenges policymakers face. This paper analyzes the effects of remuneration schemes on RES auctions’ success in markets with imperfect competition. I develop a game-theoretical auction/operation framework to model the feedback effects between the spot market’s strategic behavior and the auction stage’s bidding behavior. The analysis indicates that policymakers concerned about true-cost bidding, allocative efficiency, spot price, total payments to RES, and non-realization risk may prefer feed-in-tariff (FIT) remuneration. However, feed-in-premium (FIP) remunerations may outperform FIT ones from a social welfare perspective, particularly in markets with dirty technologies at the margin. A machine-learning-based simulation strategy is also presented, indicating that, for an auction for 14 GW of onshore wind in France, FIP auction with a winning incumbent leads to 1.40% higher prices than FIT ones.



Frequent Auctions for Intraday Electricity Markets

Christoph Graf, Thomas Kuppelwieser, and David Wozabal

Year: 2024
Volume: Volume 45
Number: Number 1
DOI: 10.5547/01956574.45.1.cgra
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Abstract:
Continuous trading is currently becoming the standard for intraday electricity markets. In this paper, we propose frequent auctions as a viable alternative. We argue that batching orders in auctions potentially leads to lower liquidity cost, more reliable, less noisy price signals, and allows for better alignment of market outcomes with the technical realities of the transmission grid. In an empirical study, we compare the German continuous intraday market with counterfactual outcomes from frequent auctions. We find that traded volumes tend to be higher for continuous trading; however, the auction market benefits from lower liquidity costs and less noisy price signals. Furthermore, we critically discuss the suitability of continuous trading in the presence of network constraints and technical restrictions of conventional units. Taken together these findings suggest that in sparsely traded intraday markets, pooling orders in frequent auctions may be beneficial.





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