What is Commercial Energy Storage system

What is Commercial Energy Storage system

Blog Article

Components

• Battery
  
  
  
  • Function: The core component for storing electrical energy. It converts electrical energy into chemical energy during charging and reverses the process during discharging to supply power to the grid or electrical equipment.
  
  
  • Common types: Lithium - ion batteries are widely used in CESS due to their high energy density, long cycle life, and low self - discharge rate. Lead - acid batteries are also used in some cases because of their low cost, although they have lower energy density and shorter cycle life compared to lithium - ion batteries.
  
  
  
  


• Inverter
  
  
  
  • Function: Converts the direct current (DC) stored in the battery into alternating current (AC) to meet the power supply requirements of commercial electrical equipment, which usually operate on AC.
  
  
  • Requirement: It needs to have high conversion efficiency, stable output voltage and frequency, and the ability to withstand high power to ensure the normal operation of the energy storage system.
  
  
  
  


• Control System
  
  
  
  • Function: Monitors and controls the entire energy storage system, including managing battery charging and discharging, regulating the output power and voltage, and ensuring the safe and efficient operation of the system. It can also communicate with the power grid and other energy - related equipment to achieve optimal energy management.
  
  
  • Requirement: It should have high - speed data processing capabilities, reliable fault - detection and protection mechanisms, and be able to adapt to different operating conditions and user requirements.
  
  
  
  

Working Principle

• Charging: When there is excess electricity in the power grid or from renewable energy sources such as solar panels and wind turbines, the CESS charges the battery. The control system regulates the charging current and voltage to ensure the battery is charged safely and efficiently.


• Discharging: When the commercial facility needs electricity, such as during peak - power - consumption periods or when there are power outages, the battery discharges. The inverter converts the DC from the battery into AC and supplies it to the electrical equipment in the commercial facility to meet the power demand.

Applications

• Peak - shaving and Valley - filling
  
  
  
  • Function: Commercial users can use CESS to store electricity during off - peak hours when electricity prices are low and discharge it during peak hours when electricity prices are high. This helps to reduce electricity costs and balance the power grid load.
  
  
  • Example: A shopping mall can charge its energy storage system at night when electricity prices are relatively low and use the stored energy during the day when the mall has a high - power demand, thereby reducing its electricity bill.
  
  
  
  


• Renewable Energy Integration
  
  
  
  • Function: CESS can store the excess electricity generated by renewable energy sources to solve the problem of intermittency and instability of renewable energy. This ensures a continuous and stable power supply.
  
  
  • Example: In a commercial building with solar panels on the roof, the energy storage system can store the electricity generated by the solar panels during the day and supply it to the building at night or on cloudy days.
  
  
  
  


• Backup Power Supply
  
  
  
  • Function: In the event of a power outage, CESS can immediately supply power to critical loads in commercial facilities to ensure the normal operation of important equipment and avoid losses caused by power outages.
  
  
  • Example: Hospitals, data centers, and banks can use CESS as a backup power supply to ensure the continuous operation of life - support systems, servers, and other critical equipment during power failures.
  
  
  
  

Advantages

• Cost - saving: By optimizing the use of electricity and taking advantage of time - of - use electricity price differences, commercial users can reduce their electricity costs. In addition, for some commercial facilities with high - power demand, using energy storage systems can help avoid high - demand charges from the power grid.


• Improved Power Quality: CESS can provide stable power output, reducing voltage fluctuations and power outages, which helps to improve the reliability and stability of the power supply for commercial facilities. This is especially important for some sensitive electrical equipment that requires high - quality power.


• Environmental Friendliness: When combined with renewable energy sources, CESS helps to increase the utilization of clean energy, reduce the consumption of fossil fuels, and lower carbon emissions. This is in line with the global trend of environmental protection and sustainable development.