With the transformation of energy structure and the advancement of energy internet, energy storage technology has become an important component of modern energy systems. Energy storage system can effectively solve the instability problem of renewable energy generation, improve the operational efficiency of power systems, and help achieve sustainable energy development. Energy storage systems are typically composed of multiple components, each playing a different role in jointly achieving energy storage and release. The following are common components and their meanings of energy storage systems:
1、Battery pack： A power supply consisting of multiple batteries connected in series, used for charging, discharging, and storing electrical energy.
2、Energy storage inverter PCS (bidirectional operation): It is an important equipment in energy storage systems, which can achieve inverter rectification bidirectional operation and AC/DC conversion. The working principle of PCS needs to be implemented through a control system.
3、Isolation transformer: realizes the conversion of high and low voltage, and isolates high-voltage equipment and batteries.
4、BMS management unit: manages the dynamic inspection of battery charging and discharging, as well as battery status, to prevent overcharging and over discharging of the battery, which can improve battery utilization.
5、EMS Energy Management System: Summarize information within the energy storage system, comprehensively control the operation of the entire system,And make relevant decisions to ensure the safe operation of the system.
6、Network connected devices: Energy storage systems typically need to be connected to the power system to achieve bidirectional flow of electricity. Network connection devices, such as power grid access points, transformers, switchgear, etc., play a role in connecting and distributing electrical energy.
The significance of energy storage systems is mainly reflected in the following aspects:
1、Improving the stability of the power system: Energy storage systems can effectively solve the instability problem of renewable energy generation and improve the stability of the power system. When there are fluctuations in renewable energy generation, the energy storage system can quickly charge and discharge, maintain the stable operation of the power system, and avoid downtime or power outages caused by power shortages.
2、Energy storage and balance: Energy storage systems can store excess electrical energy and release it when needed, achieving energy balance and peak shaving. This helps to solve the problem of energy supply-demand imbalance and improve the stability and reliability of the power system.
3、Integration and utilization of new energy: Energy storage systems can be combined with new energy generation systems, such as solar photovoltaics, wind power generation, etc. It can store excess renewable energy and provide stable power output when energy supply is insufficient, promoting the large-scale application and utilization of renewable energy.
4、Optimizing energy resource allocation: Energy storage systems can effectively optimize energy resource allocation and achieve sustainable energy development. When the demand for electricity is low, the energy storage system can store the energy to avoid waste; When the demand for electricity is high, the energy storage system can quickly release the stored energy to meet the electricity demand. This can not only improve energy utilization efficiency, but also reduce the production cost of energy.
5、Ensuring power supply for important loads: Energy storage systems can also ensure the reliability of power supply for important loads. Ensuring the continuity and stability of power supply is crucial in important locations or equipment. The energy storage system can provide backup power in emergency situations, ensuring the reliability of power supply for important loads.
In summary, energy storage, as a key technology and solution, will play an important role in the field of new energy, promoting energy transformation and sustainable development. With the continuous development of technology and the decrease in costs, it plays an increasingly important role in the energy industry.