A 50 MW BESS connecting directly to the 400 kV transmission network is a more demanding compliance environment than a typical 33 kV distribution connected battery. Studies have to be carried out against a much stiffer system with tighter tolerances, and the consequences of getting any of the dynamic behaviour wrong are correspondingly more visible.

Aurora delivered the full suite of power system studies needed to demonstrate Grid Code compliance, covering RMS and EMT simulations to GC0141 and PC.A.9, P28 (RVC/SVC), G5.5 harmonics, TGN 288E insulation coordination and DRC schedules. A complete protection coordination study was completed in parallel so that the protection settings were consistent with the dynamic behaviour shown in the compliance models.