Unlocking the flexibility potential of the Čierny Váh hydropower plant through innovative modernisation, integrating battery hybridisation to improve the supply of secondary reserve power to the Grid
Abstract
The SE Integrator project consists of the modernisation of the Čierny Váh pumped storage hydro power plant (6 x 122.4 MW) owned and operated by Slovenské Elektrárne (SEAS). It is now in the procurement phase to modernise two of the existing turbines with variable speed turbines hybridised with a battery to drastically increase the grid regulation capacity, in particular the provision of aFRR. With this project, Čierny Váh PHSP will play a key role in stabilising the grid in the region. SEAS and SuperGrid Institute investigated and optimised the technical and economic added value of hybridising the two refurbished units with a utility-scale lithium-ion battery.
The article first describes the SE Integrator project and the technical benefits of different sizes of Li-ion battery. It then presents the economic benefits of hybridising the Čierny Váh pumped storage plant and provision of aFRR balancing capacity in baseload mode. Finally, the article concludes with the optimal battery sizing and associated control strategy to be implemented.
Quentin Boucher, Fabien Grand-Perret, Tomáš Šimovič
Presented at Hydro 2025
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