In this note, we are going to learn about Pumped Storage Plant, about its diagram, benefits and examples as well. Welcome to Poly Notes Hub, a leading destination for engineering notes for diploma and degree engineering students.

Author Name: Arun Paul.

What is Pumped Storage Plant?

A Pumped Storage Plant (PSP) is a type of hydroelectric power station that uses water’s gravitational potential energy to store energy and pump it from a lower elevation reservoir to a higher elevation. During times of high electricity demand, turbines are used to release stored water and generate electricity.

There are two types of Pumped Storage Power Plants –

1. Open-Loop Systems
2. Closed-Loop Systems

How Pumped Storage Plants Works?

Here we have listed Pumped Storage Plant Working –

• PSPs have two water reservoirs positioned at various elevations: a lower reservoir and an upper reservoir.
• During periods of low electricity consumption (often at night or on weekends), excess grid power is used to pump water from the lower reservoir to the upper reservoir. This mechanism stores energy as raised water.
• During times of high electricity demand, stored water is released from the higher reservoir to the lower reservoir via turbines, generating electricity in the process. The water running down powers the turbines, which are linked to generators that generate electricity.

Advantages of Pumped Storage Plant

Here are some benefits of this type of plant –

• These are among the most efficient and established technologies for large-scale energy storage.
• PSPs help to stabilize the grid by providing a consistent source of electricity during peak demand periods.
• Pumped storage facilities have a relatively high cycle efficiency, frequently around 70-85%, making them an efficient source of energy storage.

Examples of Pumped Storage Plants

Here are some examples of this type of plant –

Name of the Plant	Capacity
1. Bath County Pumped Storage Station (USA)	3003 MW
2. Dinorwig Power Station (UK)	1728 MW
3. Okutataragi Pumped Storage Power Station (Japan)	1932 MW