ISP NEM 2040 Model with VRE drought – will it be reliable?

We recently published an article on the 20-27 May 2024 Variable Renewable Energy (VRE) drought and applied it to AEMO’s 2024 Integrated System Plan (ISP) eight-day renewable drought in 2040 scenario for the National Electricity Market, excluding Queensland.

Our conclusion was that the 2024 ISP VRE drought scenario does not transparently or rigorously demonstrate how the grid would perform in a VRE drought. Our concern was that when we modelled a 2040 VRE drought, we could see significant amounts of load shedding even with some simplifying assumptions made for hydro and gas-powered generation (GPG) output. Stress testing how the energy system will cope with VRE droughts well ahead of time is an important task, and the AEC has devoted significant time to developing an internal model. Our purpose in doing this work is to identify issues well ahead of time so that policy makers and market participants can take action.

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