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Schematic showing a low-Head PHS concept and its main components.

Schematic showing a low-Head PHS concept and its main components.

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To counteract a potential reduction in grid stability caused by a rapidly growing share of intermittent renewable energy sources within our electrical grids, large scale deployment of energy storage will become indispensable. Pumped hydro storage is widely regarded as the most cost-effective option for this. However, its application is traditionall...

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... focused on conceptual adaptations and technological advancements utilising low-and ultra-low-head scenarios. Some of these technologies, such as wastewater, run-of-river hydropower, or tidal barrages have seen prototyping and commercial deployment. However, theoretical attention and practical implementation towards low-head PHS has been limited. Fig. 1 shows a conceptual drawing of what such a system may consist of when deploying a reversible pump-turbine coupled to a motorgenerator that is connected to the grid via an AC-DC-AC converter for variable speed ...

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