Capacity Value of Interconnection Between Two Systems

Abstract

Concerns about system adequacy have led to the establishment of capacity mechanisms in a number of regulatory areas. Against this background, it is essential to accurately quantify the contribution to security of supply that results from interconnectors to neighbouring systems. This paper introduces a definition of capacity value for interconnection between two systems in the form of a capacity allocation curve. Four power flow policies are proposed to encompass the full range of possible market outcomes that may affect the capacity value. A convolution-based method is presented to efficiently compute and compare capacity allocation curves, and it is applied to a model system that is inspired by Great Britain's interconnection with the continental Europe. The results indicate areas of interest for the coordination of capacity mechanisms.

An interdisciplinary research perspective on the future of multi-vector energy networks

“…On the other hand, determining the capacity value of an interconnector is much more challenging [19]- [21]. This is not least due to the bidirectionality of interconnectors, which can both import and export.…”

Capacity Value of Interconnectors for Resource Adequacy Assessment in Multi-Region Systems

“…Contemporary research on the capacity value of interconnectors is relatively limited. Tindemans et al [7] studied the capacity value of an interconnector between two regions using Monte Carlo simulation. The impact of different policies on capacity value was investigated, and a "share" policy, in which the two regions maximise their combined reliability without acting 'selfishly' to minimise their own risk, delivered the best outcomes.…”

“…When the Celtic Interconnector is installed, there is a rapid decrease in EENS in Ireland, a small decrease in EENS in France, and no change in EENS in GB. This behaviour is partially due to the regularisation term in (14), which uses the weightings (7) to allocate the ENS based on the peak demand of the regions. Ireland initially had a disproportionately high EENS relative to its peak demand, so the additional interconnection is used to reduce shortfalls there before reducing those in France (which has a higher absolute, but lower relative, EENS).…”