Long term nodal pricing and transmission costing

摘要

This article questions costing principles through their links with long term nodal pricing and discusses remaining steps to the implementation of the associated model. The long term nodal pricing model differs from the standard nodal pricing model in that it considers transmission capacities as decision variables. We show that a tariff based on long term nodal prices on an optimal network is equivalent to a tariff based on the compensation of each network element development costs proportionally to their usage by network transactions (balanced production-demand sets), i.e. based on the proportional costing principle. In a multi-situation framework, we show that development costs of each line are mostly allocated to situations in which the line is saturated. However, we show that cost allocation between saturating situations is complex as it entangles spatial and temporal effects. Intrinsically linked with the fact that the network is dimensioned to face contingencies, the analysis of multiple saturating situation cost allocation is the key remaining step to the model implementation.