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2010 | OriginalPaper | Buchkapitel

Capacity Charges: A Price Adjustment Process for Managing Congestion in Electricity Transmission Networks

verfasst von : Mette Bjørndal, Kurt Jörnsten, Linda Rud

Erschienen in: Energy, Natural Resources and Environmental Economics

Verlag: Springer Berlin Heidelberg

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Abstract

In this paper, we suggest a procedure based on capacity charges for managing transmission constraints in electricity networks. The system operator states nodal capacity charges for transmission prior to market clearing. Market clearing brings forth a single market price for electricity. For optimal capacity charges the market equilibrium coincides with that of optimal nodal pricing. Capacity charges are based on technical distribution factors and estimates of the shadow prices of network constraints. Estimates can be based on market information from similar congestion situations, and then capacity charges can be brought near the optimal values through an iterative process.

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Fußnoten
1
The “DC” approximation is the customary approximation used in the literature when dealing with the management of transmission constraints. Under these assumptions, and with well-behaved cost and benefit functions, the optimal dispatch problem is convex. For the specifics of the “DC” approximation, see for instance Wu and Varaiya (1995), Chao and Peck (1996), or Wu et al. (1996). In the “DC” approximation both losses and reactive power are left out.
 
2
See Dolan and Aldous (1993).
 
3
In general AC systems the load factors depend on the distribution of loads over the network. Our method applies also for general AC systems, however, requiring recalculations of the load factors according to the load.
 
4
Refer to Wu et al. (1996) for the characteristics of optimal nodal prices.
 
5
The number of independent loops are \(m - n + 1 = 8\,\mbox{ \textendash }\,6 + 1 = 3\).
 
6
In reality, this may not be so, as the grid lines may be operated with different capacities depending on the direction of the flow over the interconnection. This is especially so if links are aggregated individual lines.
 
Literatur
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Metadaten
Titel
Capacity Charges: A Price Adjustment Process for Managing Congestion in Electricity Transmission Networks
verfasst von
Mette Bjørndal
Kurt Jörnsten
Linda Rud
Copyright-Jahr
2010
Verlag
Springer Berlin Heidelberg
DOI
https://doi.org/10.1007/978-3-642-12067-1_16

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