Pumped hydro storage (PHS) can significantly reduce the need for fossil-fueled generation by providing large-scale energy storage and enhancing grid stability. Here’s how:
- Storing Excess Renewable Energy: PHS stores surplus electricity generated from renewable sources like wind and solar power during off-peak hours. This energy is then used during peak demand periods, reducing the reliance on fossil fuels.
- Balancing Supply and Demand: PHS helps to balance the grid by stabilizing supply and demand fluctuations, ensuring a constant and reliable power supply. This supports the integration of intermittent renewable energy sources into the grid, thereby reducing the need for backup power from fossil fuels.
- Ancillary Services: PHS units offer various ancillary services such as voltage stability, frequency control, and reserve management. These services support grid operations and enhance the effectiveness of renewable energy.
- Long-Duration Storage: PHS provides long-duration energy storage, which is crucial for maintaining grid stability over extended periods, especially during extended periods of low renewable energy output.
- Environmental Impact: By reducing the reliance on fossil fuels, PHS helps lower greenhouse gas emissions and aligns with net-zero targets by supporting a cleaner energy system.
In summary, pumped hydro storage acts as a buffer for variable renewable energy, ensuring that power is available when it’s needed most, thereby reducing the dependence on fossil fuels.
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