BESS Concept Studies — Transmission Network
A series of Concept Studies for 7x sites of EHV connected BESS
The challenge
Gresham House was developing a series of grid applications for large-scale BESS sites connected to the transmission network across Scotland. Aurora was tasked with developing the initial concept ideas into worked-up proposals covering transformer rating and standardisation, fault ratings, operability, modularisation and transformer energisation.
What Aurora did
We carried out a full concept study for each site, ensuring that the scheme was ready to progress and that many of the usual pitfalls were addressed before gate approval. This included confirming transformer sizing, impedance and tap-changer requirements, ensuring sufficient inverter capacity for the required MW and MVAr range, checking fault levels against standard switchgear ratings, assessing transformer energisation and identifying any need for point-on-wave switching controllers. A key part of the assessment was constructability and the cost-benefit trade-off between bespoke transformer ratings and standardised equipment.