The application scenarios of lithium battery packs in wind energy storage systems mainly include the following aspects:

Smoothing active power fluctuations in wind power systems: When wind power systems are connected to the grid for operation, lithium battery packs are connected in parallel at the outlet of the wind power system and can play a role according to the operation status of the power grid. When the power grid is operating normally, the lithium battery energy storage system is mainly used to smooth the active power fluctuations of the wind power system. Through rapid charging and discharging, it makes the output power of the wind power system more stable, reduces the power fluctuations caused by wind force changes, thereby improving the power quality and stability of the grid-connected wind power system and ensuring the safe operation of the power grid.

Provide reactive power support: When a power grid failure occurs, lithium battery packs can supply reactive power to the grid. In an emergency situation where a power grid failure occurs, the support of reactive power is crucial for helping the power grid resume normal operation. Lithium battery packs can respond quickly, release reactive power, maintain the stability of grid voltage, prevent problems such as voltage collapse, and enhance the grid's fault recovery capability.

Controlling the stability of voltage and frequency at common connection points: When wind power systems operate off-grid, lithium battery packs are mainly used to control the stability of voltage and frequency at common connection points. Due to the instability of wind resources, the electrical energy output by wind power systems may not meet the demands of the load, resulting in fluctuations in voltage and frequency at common connection points. The lithium battery pack can automatically adjust the charging and discharging power according to the changes in load, keeping the voltage and frequency at the common connection point within a reasonable range to ensure the stable operation of the off-grid wind power system.

Enhancing the utilization rate and stability of wind energy and reducing wind curtailment: Lithium battery packs enable wind farms to store excess energy when there is an excess of wind and release it when the wind is insufficient. Wind power generation is characterized by intermittency and instability. When the wind is strong, it may generate electricity that exceeds the demand of the power grid, while when the wind is insufficient, it cannot meet the electricity demand. Through the energy storage function of lithium battery packs, excess electrical energy can be stored and released when needed, thereby enhancing the utilization rate and stability of wind energy, reducing wind curtailment, and improving the economic benefits of wind farms.

Participating in electricity market transactions to gain profits: After connecting to the energy storage system, wind farms can arbitrage through the peak-valley electricity price difference. During periods when electricity prices are low, the excess electrical energy is utilized to charge the lithium battery pack. During periods of high electricity prices, the stored electrical energy in lithium battery packs is released into the power grid to obtain economic benefits. In addition, wind farms can also participate in transactions such as frequency regulation auxiliary services in the electricity market, adjust charging and discharging strategies according to the demands of the power grid, and further enhance economic benefits.