Cooling method for high power transformers

For high power transformers, two types of cooling methods, forced oil cooling (OF) and forced water cooling (OW), are commonly used.

1. Forced Oil Cooling (OF): This type of cooling method forcibly circulates cooling oil through coolers and pumps to provide efficient heat dissipation. The cooling oil circulates inside the transformer, absorbing the heat generated inside the transformer and transferring it to the cooler, which then releases the heat to the surroundings through forced ventilation or water cooling. Forced oil cooling method is suitable for high power transformers, which can provide high heat dissipation capacity and temperature control precision.
2. Forced water cooling (OW): This cooling method realizes heat dissipation by flowing cooling water through the transformer’s internal cooling channels or coolers. Forced water cooling is suitable for high power transformers with high heat dissipation capacity and heat transfer efficiency. Typically, this type of cooling requires equipment such as pumps and cooling towers to keep the cooling water circulating and temperature controlled.

These two cooling methods are widely used in high-power transformers, the specific choice of which method depends on the design requirements of the transformer, feasibility and economy and other factors. Generally speaking, the forced oil cooling method is more common and widely used in terms of heat dissipation capacity and temperature control of transformers, while the forced water cooling method is suitable for some special application scenarios or special requirements of transformers.

In the actual application, according to the transformer’s power demand, environmental conditions, feasibility and economy and other factors, combined with the professional electrical engineer’s advice, choose the appropriate cooling method to ensure the reliable operation of the transformer and heat dissipation effect.