Pumped Hydroelectric Energy Storage (PHES) facilities can provide hundreds of megawatts up to several gigawatts of electrical power for continuous generation periods of a significant part of a day. PHES systems can be used as capacity firming to balance the output of large-scale Variable Renewable Energy (VRE) sources and support grid stability. The efficient and cost-effective planning and operation of hybrid large-scale VRE source and energy storage systems requires detailed system techno-economic modelling to consider the specific defining features of each type of generation and storage plus seasonal variations in both local market conditions and energy resources.
This case study models the operation of a hypothetical hybrid large-scale solar PV and PHES system in north Queensland. The operation of a 500 MW solar PV farm and a 400 MW pumped hydroelectric energy storage (PHES) facility is investigated.
3 key takeaways from this presentation:
1. Strong revenue flow of large-scale solar PV + pumped hydro system throughout year
2. Can provide dispatchable power with low emissions intensity
3. Optimal operational profile strongly seasonal dependent.