News & Insights

Technical notes from the Aurora team

Practical insight on grid compliance, protection, earthing, power quality and the standards that shape connections in Great Britain.

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8 Oct 2026
Retrospective Electromagnetic Transient (EMT) models are coming for the majority of existing large generation units!

NESO has been pushing the need for retrospective EMT models as part of the GC 0168 code modification. This requirement is being requested by NESO as…

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24 Mar 2026
Iberian Split – Final Grid Incident Report from ENTSO

The final report from ENTSO is available following the Iberian blackout in 28th April 2025. The report is not an easy read, and its presentation…

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9 Jan 2026
Aurora is now Part of Morson Praxis

What a start to 2026! Aurora Power Consulting are pleased to announce that we are now part of the Morson Praxis group. This exciting development…

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28 Jul 2025
Arc Flash Studies – Dispelling Some Myths

As a power systems analysis consultant we regularly get asked to carry out arc flash studies. We are always happy to do them, as it is a useful…

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19 Jul 2025
Understanding DNO / DSO Curtailment

Introduction Limiting the use of the DNO / DSO network during congested hours is a well established process as part of Active Network Management…

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11 Jul 2025
Problems with the IEC 60909 Calculation Method (And ENA G74) in CFG Dominated Networks

The IEC 60909 standard is well established, and used across most of industry to calculate the maximum fault currents that can occur on a system. The…

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5 Jul 2025
High EPR Sites and Hot / Cold Classification

Introduction When we carry out an earthing study for a site, one of the key questions we try and answer quickly are ‘Is the site a Hot Zone?’ and ‘Is…

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27 Jun 2025
Earthing Studies: Fault Return Current – ENA S34 Calculations vs Detailed Models

Introduction In earthing studies, one of the most important steps to undertake is to calculated the fault current actually injected into the ground…

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13 Jun 2025
Soil Resistivity Testing

Introduction Measuring soil resistivity by direct electrical measurement is fundamental to designing a safe and cost-effective earthing system. It is…

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