Scientific development of pumped storage and new energy storage

What is pumped storage?

2.1. General concept of pumped storage Pumped storage originates from hydro generator technology, and as an energy storage technology, is commonly used as an auxiliary power service, such as peak shaving, frequency and phase regulation, emergency backup, and maintain the stability of the grid.

What is pumped hydro energy storage (PHES)?

Pumped hydro energy storage (PHES) has been recognized as the only widely adopted utility-scale electricity storage technology in the world. It is able to play an important role in load regulation, frequency and phase modulation and black starts in power systems. Due to its outstanding functions, this technology has been widely used worldwide.

Can optical storage improve the performance of pumped-storage power units?

Combined with chemical energy storage, the failure to achieve second-order response speed and the insufficient safety and reliability of pumped-storage power units could be solved. With the better solar energy and site resources, the integrated performance can be improved by an optical storage system installed in future pumped-storage stations.

What is pumped-storage power station?

The pumped- storage power station can achieve long-term storage of large-capacity power by itself. The multiple-energy- combined pumped-storage station can also improve the quantity of new energy connecting to the power grid on the premise of guaranteeing the stability and safety of the Global Energy Interconnection 240 power grid.

Why is pumped hydro energy storage important?

Its development will increase in the coming years due to the growing concern of climate change and renewed interests in renewable energy. Pumped hydro energy storage could be used as daily and seasonal storage to handle power system fluctuations of both renewable and non-renewable energy (Prasad et al., 2013).

Can variable-speed pumped-storage technology improve the operational flexibility of traditional power stations?

The operational flexible of the traditional pumped-storage power station can be improved with variable-speed pumped-storage technology. Combined with chemical energy storage, the failure to achieve second-order response speed and the insufficient safety and reliability of pumped-storage power units could be solved.