What Is a Traction Transformer? Traction Transformer Cooling Methods

What traction transformer? The traction transformer is a power transformer with a special voltage level that transmits the electric energy of the three-phase power system to two single-phase traction lines with respective loads. Two single-phase traction lines supply power to the upstream and downstream locomotives respectively. In an ideal situation, the two single-phase loads are the same. Therefore, the traction transformer is used as a three-phase to two-phase transformer.

Traction transformers are divided according to cooling methods:

1. Dry-type transformer: relies on air convection for cooling, and is generally used for small-capacity transformers such as local lighting and electronic circuits.

2. Oil-immersed transformer: relies on oil as cooling medium, such as oil-immersed self-cooling, oil-immersed air-cooling, oil-immersed water-cooling, forced oil circulation, etc.

So, what measures need to be taken when manufacturing traction transformers? When manufacturing traction transformers, the following measures need to be taken after using insulating paper:

1. Strengthen the calculation of the temperature rise of the transformer winding and strictly control the winding temperature rise.

2. Use simulation calculation software to simulate the temperature inside the transformer to provide a basis for determining the boundary between high-quality insulating paper and ordinary insulating paper. According to the characteristics of the transformer oil itself, reasonably determine the use boundaries of the above two materials to avoid There is a risk of cracking of oil and ordinary insulating paper, electrical breakdown of insulation or thermal breakdown.

3. Increase and improve the oil circuit in the coil to reduce the temperature rise of the transformer oil and avoid oil cracking.

4. Improve the external cooling system, increase the cooling capacity of the transformer, and reduce the temperature rise of the transformer under normal load.

5. Improve the circumferential support of the inner coil so that the transformer can withstand the mechanical pressure generated during high overload and short circuit.

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