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Degrees of Coordination in Market Coupling and Counter-Trading

Giorgia Oggioni and Yves Smeers

Year: 2012
Volume: Volume 33
Number: Number 3
DOI: 10.5547/01956574.33.3.3
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Abstract:
Cross-border trade remains a contentious issue in the restructuring of the European electricity market. This paper analyzes the cross-border trade problem through a set of models that represent different degrees of coordination both between the energy and the transmission markets and among national Transmission System Operators (TSOs). We first present a nodal price-like organization of the system, where Power Exchanges (PXs) and Transmission System Operators are integrated to operate the energy and transmission markets. This system is not implemented in Europe but its success elsewhere makes it the natural reference for the study. We then move to a more realistic representation of the European electricity market based on the so-called market coupling design where energy and transmission are operated separately by PXs and TSOs. We consider different degrees of coordination of the national TSOs' activities to assess the range of inefficiencies that the lack of integration can lead to. The paper supposes price taking agents and hence leaves aside the incentive to game the system induced by zonal systems. Keywords: Market Coupling, Counter-Trading, Coordination, Generalized Nash Equilibrium, European Electricity Market



Comparison of congestion management techniques: Nodal, zonal and discriminatory pricing

Pär Holmberg and Ewa Lazarczyk

Year: 2015
Volume: Volume 36
Number: Number 2
DOI: 10.5547/01956574.36.2.7
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Abstract:
Wholesale electricity markets use different market designs to handle congestion in the transmission network. We compare nodal, zonal and discriminatory pricing in general networks with transmission constraints and loop flows. We conclude that in large games with many producers and certain information, the three market designs result in the same efficient dispatch. However, zonal pricing with counter-trading results in additional payments to producers in export-constrained nodes, which leads to inefficient investments in the long-run.





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