Dry-type transformer: the "oil-free guard" in the power system

In modern power systems, transformers play a vital role. They can efficiently transmit electrical energy from power plants to thousands of households. As a member of the transformer family, dry-type transformers are widely used in many fields with their unique advantages and have become an indispensable "oil-free guard" in the power system.

1. Definition and structure of dry-type transformers

Dry-type transformers are transformers that do not use oil as an insulating and cooling medium. It mainly consists of windings and iron cores. The windings are usually wound with copper or aluminum wires wrapped in insulating materials, while the iron cores are stacked with high-permeability silicon steel sheets. Unlike traditional oil-immersed transformers, there is no oil between the windings and the iron core of dry-type transformers. Instead, they are insulated and dissipated by air or other solid insulating materials. This design makes dry-type transformers safer and more reliable without having to worry about oil leakage during operation.

2. Advantages of dry-type transformers

(I) High safety

Dry-type transformers do not have oil, so there is no risk of oil leakage, combustion or explosion. This makes it particularly suitable for use in densely populated areas, high-rise buildings, underground facilities, and places with extremely high fire protection requirements. For example, in hospitals, schools, shopping malls and other places, dry-type transformers can provide these places with a stable power supply while ensuring the safety of personnel and equipment.

(ii) Easy maintenance

Due to the absence of oil, the maintenance of dry-type transformers is relatively simple. It does not require regular inspections of oil level and oil quality like oil-immersed transformers, nor does it require complex oil filtering and replacement operations. This not only saves maintenance time and cost, but also reduces the possibility of failures caused by improper maintenance. Generally speaking, dry-type transformers only need to regularly check the insulation resistance of the windings, temperature sensors and other components to ensure their normal operation.

(iii) Good environmental performance

Dry-type transformers do not produce oil pollution during operation and are environmentally friendly. As people's awareness of environmental protection continues to increase, this advantage of dry-type transformers makes them popular in areas and projects with strict environmental protection requirements. It not only reduces potential pollution to soil and water resources, but also meets the requirements of sustainable development.

3.Application fields of dry-type transformers

Dry-type transformers are widely used in various fields. In the industrial field, it provides stable power support for the factory's production line to ensure the normal operation of production equipment. In the commercial field, dry-type transformers provide power for lighting, air conditioning, elevators and other equipment in shopping malls, office buildings and other places. In the civilian field, dry-type transformers are also increasingly used in the power distribution system of residential areas. In addition, it also plays an important role in rail transportation fields such as subways and high-speed railways, providing reliable power guarantee for the signal system, communication system and station equipment of these transportation systems.

4. Future development of dry-type transformers

With the continuous advancement of science and technology, dry-type transformers are also constantly developing and innovating. On the one hand, researchers are working hard to improve the insulation performance and heat dissipation efficiency of dry-type transformers to further enhance the stability and reliability of their operation. On the other hand, with the application of new materials and new processes, the size and weight of dry-type transformers are expected to be further reduced, which will give it a broader application prospect in more fields.

In short, dry-type transformers play an increasingly important role in the power system with their advantages of high safety, convenient maintenance and good environmental protection performance. It not only provides a strong guarantee for the stable operation of modern society, but also brings more convenience and safety to our lives and work. In the future, dry-type transformers will continue to make greater contributions to human power industry with their unique advantages.