Transformers play an important role in rail transit in many aspects, mainly including the following aspects:

1. Power conversion: The transformer reduces the voltage in the high-voltage power grid to a voltage level suitable for rail transit systems (such as 1.750V, 1500V or 3000V) to supply trains and other equipment. /2. Power supply stability: Through the transformer, the power supply system can be regulated and controlled to ensure that the train is running.

Get a stable power supply, thereby improving safety and reliability. /3. Isolation protection: The transformer provides electrical isolation, which helps protect rail transit equipment from overload, short circuit and other faults.

Improve the security of the system.

4. Support regenerative braking: In some rail transit systems, the train will convert kinetic energy into electrical energy when braking, and send this feedback electrical energy back to the power supply network through a transformer to achieve effective use of energy.

5. Load distribution: Transformers can help reasonably distribute the loads in different areas and on different lines, and optimize the operating efficiency of the entire rail transit system.

6. Adapt to environmental changes: External environmental factors (such as temperature changes, current fluctuations, etc.) may affect the power supply quality.

The transformer can be adjusted according to actual conditions to maintain a stable output.

7. Combined with the signal system: In some cases, the transformer can also be used to provide the required low-voltage DC power supply for the signal system to ensure the normal operation of the signal equipment and improve driving safety.

In short, the transformer is an indispensable and important part of the rail transit system. Its role is not limited to simple power conversion, but also involves the safety, efficiency and stability of the entire power supply network.