The transmission network in the Dublin metro area has always been known to experience high short circuit currents.
The rapid expansion of electricity demand and generation connections in Dublin has led to increased short-circuit fault levels, presenting significant safety concerns. As a result, both operational measures and infrastructure enhancements are required to manage these risks.
EirGrid planners and operators use various strategies to minimise the risk of high short circuit currents – such as investment in technologies and substation sectionalising.
EirGrid advises generator developers to thoroughly assess their connection strategies to avoid short-circuit constraints that may impact project timelines or viability.
The EirGrid Grid Code specifies the short circuit current requirements for the Ireland transmission system.
The Grid Code | The Grid | EirGrid
The recent EirGrid short circuit memo outlines the challenges for generators connecting to the transmission network in the Dublin metro area
Short-Circuit-Summary-for-Industry-27032025.pdf
Are you concerned that your generation project could pose a potential short circuit risk to the power system in Ireland?
At TNEI we understand how EirGrid undertakes the calculation of short circuit currents.
Using a best practice interpretation of the IEC 60909 standard, our in-house short circuit model can replicate the EirGrid published data.
We can therefore determine the impact of your generator on areas that are at risk of exceeding the short circuit standard.
