With the development of human society, our demand for energy is increasing, and with the requirements of environmental protection, more and more clean energy has truly entered a period of rapid development.

　　Although there are many types of energy storage methods, their role on the grid system is roughly as follows:

　　(1) Grid-connected centralized renewable energy

　　Realizing the power generation of renewable energy can smoothly output and increase the grid power.

　　(2) Thermal power joint frequency modulation

　　According to the power grid instructions, when frequency fluctuations occur in the power grid, frequency modulation is carried out in coordination with the corresponding instructions.

　　(3) Paid peak shaving

　　The energy storage system realizes the power grid regulation peak power consumption. Reduce the investment in the distribution network and ease the load pressure on the grid during the peak period of power consumption.

　　(4) Independent frequency modulation

　　Quickly and accurately adjust the frequency according to the AGC instructions, smooth the grid frequency, and improve the grid operation efficiency and safety and stability.

　　(5) Peak cutting and valley filling

　　The energy storage system is used to store energy when the electricity price is low, and discharge when the electricity price is high, so as to help users reduce the overall cost of electricity without changing their behavior.

　　(6) Other services

　　The energy storage system can also assist the power grid with various services such as black start and voltage regulation.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.