Energy security in an all-Island context – does worrying electricity generation inadequacy necessitate an all-island focus on energy security

Ó Gallachóir heralds the development of the all-island Single Electricity Market (SEM) as one of the “hidden giants” of greater all-island cooperation, 25 years after the signing of the Good Friday Agreement.

In 1995, the North South Electricity Interconnector was restored after almost 20 years of inaction and since then several significant electricity and gas infrastructure projects have been developed on the island, ranging from the commissioning of the Moyle electricity interconnector to Scotland in 2021 to the approval in 2018 of a second North South Interconnector.


While benefits to consumers have been evident in the delivery of cost reductions per kWh, the all-island market has also been critical to providing timely warnings on supply risks via generation system adequacy reports.

“These reports significantly helped enable us to look at the challenge of meeting our electricity demands through electricity supply on an all-island basis in an efficient and cheaper way,” explains the Cork-based academic.

“That focus on efficiency leads to emissions reduction relative to what otherwise would have ensued. Similarly, efficiencies also lead to price reductions, relative to if these markets had continued to evolve separately.”

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