What are the main methods of energy storage?
Main methods of energy storage
Energy storage is to convert electrical energy into other forms of energy and store it. The basic method of energy storage is to first convert electricity into other forms of energy, store them in an energy storage device, and release them when needed; according to the characteristics of energy conversion, electrical energy can be converted into kinetic energy, potential energy, chemical energy, etc.
The purpose of energy storage is mainly to achieve stable operation of power at the supply end, transmission end and user end. Specific application scenarios include:
1) It is used in the fields of peak shaving, load smoothing, rapid adjustment of power grid frequency, etc. to improve the efficiency of power grid operation. Stability and reliability;
2) Used in the field of new energy power generation to reduce the impact of instantaneous changes in photovoltaic and wind power generation systems on the power grid, and reduce the phenomenon of abandoning light and wind;
3) Used in new energy vehicle charging stations, Reduce the impact of large-scale instantaneous charging of new energy vehicles on the power grid, and you can also enjoy the price difference between peaks and troughs.
Main types of energy storage
on the currently market The main types of energy storage include physical energy storage and electrochemical energy storage.
According to different energy conversion methods, energy storage can be divided into physical energy storage, electrochemical energy storage and other energy storage methods:
1) Physical energy storage includes pumped hydro energy storage, compressed air energy storage and flywheel energy storage, among which pumped hydro energy storage With large capacity and low kilowatt-hour cost, it is currently the most widely used energy storage method in physical energy storage.
2) Electrochemical energy storage is a type of energy storage that has developed rapidly in recent years, mainly including lithium-ion battery energy storage, lead-acid battery energy storage and flow battery energy storage; among them, lithium-ion batteries have the characteristics of good cycle characteristics and fast response speed. It is the main energy storage method in electrochemical energy storage at present.
3) Other energy storage methods include superconducting energy storage and supercapacitor energy storage. Currently, they are rarely used due to high manufacturing costs and other reasons, and only demonstration projects have been built.
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