Application of Lithium Iron Phosphate Battery in Microgrid Energy Storage System

Microgrid is a heat collector that integrates load and micro energy. It operates normally in network mode and can operate independently in emergency situations. In these two modes, the microgrid system is an important unit. The high-performance energy storage system can store excess energy. For power grids, lithium iron phosphate batteries are used in microgrids with their superior performance, which can significantly improve the overall performance and energy efficiency of the microgrid system. 2. The functions and characteristics of the microgrid. The microgrid is a new type of power grid that is different from the traditional power grid. Deepen the research of micro smart grid in different countries in the world. Although the meaning of micro smart grid is different, its purpose is more or less the same, such as to improve the safety of the power system and ensure the reliability of power supply. Improve power quality and increase the utilization rate of various energy sources. Based on these functional requirements, it is required that the microgrid can be connected to the power generation operation of the power grid, and can also cut off the independent operation of the power grid, thus greatly improving the power supply reliability of the power grid and the safety of the power system. For the grid, the micro smart grid can not only absorb the grid energy, but also quickly switch its own country according to the operation status of the grid, in order to choose whether to cut off the connection with the grid or absorb the grid energy to supplement its own demand. Regarding power users, the microgrid meets their specific needs, such as improving the reliability of power supply and shortening the power supply distance, thereby reducing the loss of power transmission lines. 3. The necessity of energy storage system Energy storage technology is an important means to realize the basic functions of microgrid. The important reasons for microgrid to store electrical energy are as follows: (1) to ensure the reliability of the power supply system; (2) to ensure the quality of power supply; (3) to improve the comprehensive utilization efficiency of electrical energy; (4) to improve the grid-connected performance of various new energy sources. Therefore, a high-performance energy storage system is a powerful guarantee for realizing its own microgrid functions. 3.1 Types of energy storage systems The development of energy storage technology has a long history, with various forms. In addition to common lead-acid batteries and lithium batteries in daily life, there are pumped water storage, flywheel energy storage, superconducting magnetic energy storage, superconducting capacitor energy storage, vanadium liquid batteries, sodium-sulfur batteries, nickel-hydrogen batteries, etc. International mainstream battery packs include: lead-acid batteries, lithium batteries, nickel-hydrogen batteries, etc. Flywheel energy storage, superconducting magnetic energy storage, and superconducting capacitor energy storage are still in the research stage and have not yet been applied on a large scale. Lead-acid batteries have been applied to a certain scale in microgrid energy storage systems, but due to their own characteristics, some deficiencies have gradually emerged. 3.2 Characteristics of lead-acid batteries in traditional energy storage systems Lead-acid batteries have high requirements for ambient temperature: lead-acid batteries are the representative of traditional energy storage systems. Lead-acid batteries have high requirements for ambient temperature, that is to say, it improves the environmental requirements of the use occasion. Lead-acid batteries have very high requirements for the power distribution room: a set of system power distribution equipment is mainly some power equipment, and the area and weight of the power equipment in the power distribution room cannot be ignored. The performance of lead-acid batteries is poor at high discharge rates: when the operation mode of the microgrid is switched to connect to the grid for independent operation, the energy storage system will flow large currents in a short time, which requires the high-rate discharge performance of the energy storage system, while the traditional lead-acid battery The performance of the battery in the energy storage system is very poor. The monitoring of lead-acid batteries is inaccurate: most of the monitoring systems of lead-acid batteries are based on voltage. The accuracy of this method is very limited. Big deviation. Environmental pollution caused by lead-acid batteries: Lead-acid batteries cause serious pollution to the environment during processing and waste disposal due to the pollution caused by lead. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.