The TRW (Transmission Reinforcement Work) study shows that over the next ten years, a significant area of the transmission network will exceed the existing 63kA maximum fault current capability if the PPM (Power Parked Module)-based wind and solar generation and batteries feeds a minimum fault infeed of 1pu into a fault.  Many sites might have to be rebuilt with 80kA fault level capability or run split. The project aims to develop an innovative method which control cumulative fault infeed in order to manage maximum fault levels in the future network and reduce the need for reinforcement.   

Benefits

It is anticipated that the project will create an innovative solution that will eliminate or reduce the need to upgrade existing sites to the higher fault level capability of 80kA, or run sites split. The upgrade/rebuild of sites would cause significant delay to new renewable connections and would be excessively costly. Running sites split can result in increased network thermal and stability constraint costs due to the reduced network capability to balance power flow and the increased impedance of the network. Therefore, the project facilitates the energy transition in that it will accelerate renewable generation and battery connections and bring cost benefit to consumers.