Compliance Studies
Akira BESS — Grid Code Compliance
57 MW BESS, NGET 400/132 kV SGT tertiary at 33 kV
The challenge
Connecting at 33 kV onto a Super Grid Transformer tertiary winding is unusual and brings its own complications. The tertiary is electrically close to the transmission network, making the system stiff and the protection coordination more sensitive than a typical distribution connection, while still being treated as a Grid Code site for compliance purposes.
What Aurora did
We delivered the full Grid Code compliance package, with RMS and EMT simulations to GC0141 and PC.A.9, P28 (RVC/SVC), G5.5 harmonics, TGN 288E insulation coordination and DRC schedules. The protection coordination study was carried out in detail because the proximity to the SGT made conventional rule of thumb settings unsuitable.