In energy storage projects, transformers are an important component used for boosting, lowering, transmitting, and distributing electrical energy. Project scale is one of the key factors in selecting transformers. Larger scale projects typically require larger capacity transformers to meet high current and power requirements. Transformers in energy storage projects may need to be used for boosting or reducing power to adapt to the voltage difference between the energy storage system and the grid. The selection of transformers should consider the capacity, charging and discharging characteristics, and voltage requirements of the energy storage system. The voltage requirements in the project area are crucial for the selection of transformer models. The voltage level and number of phases must match the voltage level of the local power grid to ensure the stability and safety of energy transmission.

1、Environmental conditions：Different environmental conditions, such as temperature, humidity, and high altitude, have an impact on the performance and energy consumption of transformers. In extreme environments, specially designed transformers may be required.

2、Maintainability and durability:  Choosing transformers with good maintainability and durability is a key factor in project reliability. Reducing maintenance costs and minimizing equipment failures are crucial for the successful operation of the project.

3、Power system configuration: The configuration of the power system has a significant impact on the selection of transformer models and capacities. Considering the layout of the substation and the power flow path, to ensure that the transformer can effectively integrate with the power system.

4、Cost and budget: Cost is one of the key factors in selecting project equipment. The selection of appropriate transformer models and energy consumption levels must be within the project budget and coordinated with other equipment and engineering costs.

In summary, the selection of transformers in energy storage system must meet the requirements of environmental conditions, maintainability and durability, power system configuration, cost and budget, in order to ensure the continuous and stable operation of the energy storage system.