Pumped storage hydropower projects could play a role in Arunachal Pradesh to:

Store excess energy
Stabilize the power grid
Meet peak demand
All of the above

The correct answer is: All of the above.

Pumped storage hydropower projects are a type of hydroelectric power plant that uses two reservoirs at different elevations. During periods of low demand, excess electricity is used to pump water from the lower reservoir to the upper reservoir. During periods of high demand, the water is released from the upper reservoir back down to the lower reservoir, generating electricity.

Pumped storage hydropower projects can play a role in Arunachal Pradesh to:

  • Store excess energy. During periods of low demand, excess electricity can be used to pump water from the lower reservoir to the upper reservoir. This stored energy can then be used to generate electricity during periods of high demand.
  • Stabilize the power grid. Pumped storage hydropower projects can help to stabilize the power grid by providing a source of flexible, reliable power. During periods of high demand, pumped storage hydropower projects can generate electricity to meet the demand. During periods of low demand, pumped storage hydropower projects can store excess energy to be used later.
  • Meet peak demand. Pumped storage hydropower projects can help to meet peak demand by providing a source of flexible, reliable power. During periods of high demand, pumped storage hydropower projects can generate electricity to meet the demand.

Pumped storage hydropower projects are a valuable tool for managing the power grid and meeting the needs of a growing population.