Large Energy Storage in Nepal

Why should we study pumped storage systems in Nepal Himalayas?

Nepal Himalayas provide an ideal testbed to study pumped storage systems given high topographic gradients, large flow fluctuations, and prevalent energy demand patterns.

Is Nepal ready for pumped storage projects?

Due to global warming and subsequent climate change, Nepal needs to urgently identify sites for pumped storage projects. A reasonable number of pumped storage plants will help deliver energy security in the long term, besides enhancing system reliability. Pumped storage projects require significant capital for development.

Can solar power power the Nepalese energy system?

Nepal has vast low-cost off-river pumped hydro-energy-storage potential, thus eliminating the need for on-river hydro storage and moderating the need for large-scale batteries. Solar, with support from hydro and battery storage, is likely to be the primary route for renewable electrification and rapid growth of the Nepalese energy system.

Can pumped hydro be used to store energy in Nepal?

For several hours, overnight and seasonal storage, pumped hydro is much cheaper. Batteries and pumped hydro are complementary storage technologies. Hydrogen production in Nepal is unlikely to be significant. Hydrogen or hydrogen-rich chemicals such as ammonia could be used to store and transport energy in Nepal.

Should Nepal have storage power plants?

In the context of Nepal, the Integrated Nepal Power System (INPS) is predominantly a hydro-dominated one, where the base and intermediate power demands are met by run-of-river hydropower plants and import from India. Therefore, the national grid should have storage power plants to improve system reliability..

How much hydro storage is needed in Nepal?

The Global Pumped Hydro Storage Atlas [42, 43] identifies ~2800 good sites in Nepal with combined storage capacity of 50 TWh (Fig. 6). To put this in perspective, the amount of storage typically required to balance 100% renewable energy in an advanced economy is ~1 day of energy use . For the 500-TWh goal, this amounts to ~1.5 TWh.