Quantifying The Reliability Contribution of Interconnectors in the Britain - Ireland Power System Using a Hindcast Approach

A reliable electricity supply is a key consideration for energy system planners. At present, the value of support from other systems is of particular interest in Great Britain (GB), including from Ireland’s (IRL) Single Electricity Market, to which there is currently 1 GW of interconnection capacity. This paper presents a study of how interconnection influences risk levels in the GB and IRL systems, based on the standard Loss of Load Expectation (LOLE) and Expected Energy Unserved (EEU) indices, and a ‘hindcast’ approach for demand and wind generation. Specific areas of investigation include the effect of different resource sharing policies on risk levels, and the dependence of the value of interconnection on the wind capacities in the two systems.