How to maintain the transformer to improve insulation performance?

Transformer is an important electrical equipment in the power system, and its insulation performance plays a key role in ensuring the operation stability of the equipment. If the insulation performance of the transformer is not up to standard, it will cause the following hazards to the power system: 

1.Equipment failure: If the insulation performance of the transformer is unstable, it is easy to produce discharge failure, resulting in equipment damage, and even cause fire and other accidents. 

2. Affect the system quality: The transformer is an important equipment in the power system. If its insulation performance is unstable, it will affect the stability of the whole power system and the power supply quality of the whole power system.

Dry-Type Distribution Transformer

How to maintain the transformer to improve insulation performance?

1.Selection of insulation material 

The choice of transformer insulation material is very important. Good insulation materials can effectively isolate the conductor and the ground, which can reduce the occurrence of insulation failures. When choosing insulation materials, it should be selected according to the environment, such as climate, place of use, etc., to choose insulation materials that can adapt to the environment.

2. Regular inspection

Regular inspection is an important means to ensure the insulation performance of transformer. Regular inspection should include appearance inspection, heat resistance, grounding resistance, etc., as well as the detection and replacement of medium oil. Regular inspection can detect potential insulation faults early and improve the reliability and service life of the transformer.

3.Maintenance and cleaning

During the operation of the transformer, due to overcurrent or excessive load, it is easy to generate heat, which will produce harmful substances such as oxides on the surface of the insulating material and in the insulating oil, blocking the oil circuit, radiator and heat exchanger. If the transformer is not cleaned for a long time, the insulation material will age and accumulate, the insulation oil quality will decline, and the transformer will fail. Therefore, regular cleaning is an effective measure to improve the insulation performance of the transformer.

4.Temperature control

The working temperature of the transformer must be controlled within a certain range. On the one hand, it can ensure the stability of the working conditions. At the same time, it can reduce the aging of insulation materials caused by high ambient temperature. If the operating temperature exceeds the standard temperature range of the transformer, it should be shut down immediately for maintenance. At the same time, the transformer temperature should also be measured regularly, and timely maintenance and maintenance should be carried out to ensure normal operation.

Dry-Type Power Transformer

The role of transformer insulation

The insulation of transformer refers to the technical measures to protect the coil, iron core and other non-interference between ground and relative in the transformer to prevent breakdown and leakage. The insulation effect directly affects the safe and reliable operation and service life of the transformer.

1. Insulation impedance

The main function of transformer insulation is to maintain the electric field in the coil and prevent the leakage of the electric field. The insulation material needs to have sufficient insulation impedance. The impedance is not only related to the properties of the insulation material itself, but also to the thickness and area of the material.

2. Prevent electric shock

Transformer insulation can also prevent electric shock accidents. When the transformer is running, the voltage is very high. And if there is no insulation, there will be an arc phenomenon near the transformer, causing an electric shock accident.

3. Prevent leakage

Insulation also prevents electrical leakage. There is an electric field between the winding and the iron core in the transformer. If the electric field leaks or generates leakage, the transformer will be damaged, making the transformer lose its use value.

The insulation performance of the transformer is not only related to the safe operation and life of the equipment, but also directly affects its overall performance and reliability. Therefore, in the design, manufacture and use of transformers, insulation performance is a key factor that can not be ignored.