Although energy storage system is not directly used to expand transformer, they can help transformers cope with overload operation under certain conditions, thereby delaying or avoiding the need for expansion. The energy storage system mainly reduces the overload pressure of transformers through power regulation and peak shaving functions. The specific operating steps include the following aspects:
The first step is demand determination: based on the growth of power grid load and transformer load conditions, evaluate whether it is necessary to expand transformers and determine whether energy storage systems can be introduced to reduce transformer load.
The second step is to install the energy storage system: Based on the load requirements and budget, design a suitable energy storage system, determine the energy storage equipment and capacity, and install it correctly in the appropriate position to ensure correct connection with the transformer.
The third step is the operation and testing of the energy storage system: After installation, the energy storage system is debugged and tested to ensure its normal operation and ability to provide power support for the transformer.
The fourth step is control scheduling: configure the control parameters of the energy storage system based on the grid load and transformer load situation, and schedule the charging and discharging strategies of the energy storage system in real time to reduce the load pressure on the transformer.
The fifth step is to monitor the operation: regularly monitor the operating status of the energy storage system and the load situation of the power grid, including electricity quantity, charging and discharging speed, and temperature. And adjust the control strategy as needed to maximize the effectiveness of the energy storage system. When necessary, maintain and upkeep the energy storage system to ensure its long-term stable operation.

The main functions of energy storage systems are reflected in the following aspects:

The first is peak shaving and valley filling: during peak electricity consumption periods, the energy storage system can discharge to reduce the burden on the transformer; During periods of low electricity consumption, energy storage systems can charge and store electrical energy for future use. By balancing the load of the power grid, the stability of the power grid can be effectively improved.
The second is to reduce the cost of expansion: With the assistance of energy storage systems, the demand for transformer expansion can be reduced to a certain extent, thereby reducing the cost of expansion. Especially for some enterprises that experience overload operation in a short period of time due to special reasons such as increased equipment, this is undoubtedly an economically effective solution.
The third is to improve the reliability of power supply: energy storage systems can serve as backup power sources to provide power support in case of grid failures or power outages, ensuring the normal production and operation of enterprises. This is particularly important for enterprises with high requirements for power supply.
It should be pointed out that energy storage systems cannot completely replace transformer expansion, but by using auxiliary transformers to cope with overload operation, the need for expansion can be reduced or avoided, thereby reducing the operating costs of enterprises and improving power supply reliability.