Indian Queens BESS — Grid Code Compliance
50 MW BESS, 33 kV NGET connection
The challenge
A 50 MW BESS connecting directly to a 33 kV NGET owned substation is a more demanding compliance environment than a typical 33 kV distribution-connected system. The studies have to be carried out against a stiffer system with tighter tolerances, and any error in the dynamic behaviour is correspondingly more visible.
What Aurora did
We developed 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.
We also carried out a full sub-synchronous oscillation (SSO) study in PSCAD, liaising directly with the inverter manufacturer and PPC manufacturer to validate the system response and impedance profile.