how to cool the transformer at high temperatures

You're afraid of heat, and the distribution transformer is afraid of heat! In fact, the transformer may indeed fail due to overheating under certain conditions, and today we will talk about the cooling system of the transformer and how to cool the transformer at high temperatures.

 

 

How to cool down the transformer
In the hot summer, people need fans and air conditioners, and power transformers must also be cooled. So how to cool down the transformer?

Power transformer itself is designed with heat dissipation in mind and is equipped with a cooling system. The cooling system of the transformer by divided into two parts: the internal cooling system and the external cooling system.  The external cooling system is to ensure that the heat of the medium can be dissipated outside the transformer. The external cooling system usually includes radiators, fans, water pumps and other systems.
The cooling system of the transformer can be divided into many types according to the cooling medium and cooling method. Common cooling methods include natural cooling, oil immersion cooling, forced oil circulation cooling, air cooling, water cooling, evaporative cooling and phase change material cooling.

The cooling method of the transformer is generally represented by a combination of four codes:

Dielectric type		Cycle type
Mineral oil	O	natural c	N
Noncombustible synthetic insulating fluid	L	Forced circulation of oil is not guided	F
Gas	G	Forced circulation oil guide	D
Water	W
Air	A

For example: ONAN means oil-immersed self-cooling, that is, natural circulation of internal oil and natural circulation of external air.
The above cooling methods are all cooling methods used in daily operation of transformers. In daily life, power system personnel are also required to regularly detect the status of the transformer and regularly check and record the upper oil temperature. The upper oil temperature of the transformer with natural circulation should generally not exceed 85°C to prevent accelerated deterioration of the insulation material. At the same time, regular monitoring of load and current, increased power consumption in summer, long-term overload operation of transformers is more likely to overheat. For the situation of unbalanced three-phase load, timely adjustments should be made to maintain balanced power supply.

However, under high temperature conditions, if the cooling effect cannot be achieved by relying on the transformer's own cooling system, the power grid staff will have to use some auxiliary means, such as evaporative cooling, convection heat exchange, etc.

Put ice cubes under the transformer and use the principle of heat absorption and evaporation of ice cubes to cool the transformer

 

In addition, the cooling system can be optimized and some new cooling methods can be adopted.  introduced a main transformer condensation intelligent rapid cooling device, which used a "special air conditioner" for the transformer. This system can produce dry cold air 20°C lower than the ambient temperature and transport it to the bottom of the main transformer through pipes to achieve efficient cooling.

In short, through the transformer's own cooling system, strengthen monitoring and maintenance, the use of new cooling methods and other measures, can effectively ensure the safe operation of the transformer in high temperature weather.