Integrated System Plan (ISP) Feedback Loop Notices

Context

AEMO’s Integrated System Plan (ISP) is a roadmap for the energy transition in the National Electricity Market over at least the next 20 years, in line with government policies to reach a net zero economy by 2050. The ISP identifies the optimal development path – the lowest-cost pathway of essential generation, storage and transmission infrastructure to meet consumers’ needs for secure, reliable and affordable electricity, and to achieve net zero emissions targets. The optimal development path contains a series of power system investments, some of which are classified as “actionable ISP projects”. 

Transmission Network Service Providers (TNSPs) are required to assess the actionable ISP projects through the Regulatory Investment Test for Transmission (RIT-T). 

Following completion of the RIT-T, a TNSP may seek written confirmation from AEMO to confirm that the preferred option from the RIT-T remains aligned with the optimal development path in the most recent ISP. This process is referred to as the “feedback loop”.