The Heart of Modern Rail: 110kV Oil-Immersed Traction Transformers

Choosing a reliable 110kV oil immersed railway traction transformer is the first step in ensuring the safety and operational efficiency of railway power supply. This article will start from its core advantages and provide key purchasing and operation points to help you make informed decisions.

Amorphous Core Transformer

1.Four irreplaceable core advantages

In the field of high-voltage traction, oil immersed transformers have built a solid technical barrier with their comprehensive performance.

1.1 Unparalleled heat dissipation capability

The internal losses of transformers will be converted into a large amount of heat. The oil immersed “oil air” cooling system has extremely high efficiency and can quickly reduce the hot spot temperature to a safe range, allowing the transformer to withstand higher overload capacity when necessary without damaging the insulation life.

1.2 Innate insulation protection

The transformer oil sealed in the oil tank and solid insulation material together form a powerful insulation system. This system can not only resist internal high voltage, but also effectively prevent the invasion of external moisture and dirt, ensuring the long-term cleanliness and stability of internal components.

1.3 Durable mechanical strength

In order to withstand vibrations during transportation, installation, and electromagnetic forces during operation, the iron core and coil have undergone special reinforcement design. The sturdy structure ensures consistent mechanical performance throughout its decades long lifecycle.

1.4 Simple and economical maintenance process

The maintenance technology for oil immersed transformers is very mature. By regularly extracting oil samples for laboratory analysis, operation and maintenance personnel can accurately determine the internal health status of the equipment without the need for power outages or disassembly, greatly reducing maintenance costs and failure risks.

2.Key purchasing considerations

When making purchases, one should not only focus on the initial price, but the following performance indicators are more critical.

2.1 Loss level: Focus on the full lifecycle cost

It is necessary to clarify the values of no-load loss and load loss. Although the purchase cost of a low loss transformer is slightly higher, the savings in electricity bills over its 30-year lifespan will be significant. Energy efficiency rating is an important reference.

2.2 Overload Capacity: Matching Railway Operation Needs

The overload capacity of transformers must be evaluated based on the traffic density of the line, such as passenger dedicated lines and heavy-duty railways. Ensure that it can stably provide the required short-term excess power during peak hours and when locomotives depart intensively.

2.3 Protection level and sealing performance

The IP protection level of the casing determines its ability to resist dust and moisture. Meanwhile, the fully sealed (or sealed with oil storage tank) design can effectively slow down the aging of transformer oil and reduce maintenance frequency.

2.4 Integration degree of intelligent components

Prioritize models that reserve or directly integrate intelligent monitoring interfaces. For example, the reserved functions such as online monitoring of dissolved gases in oil and temperature measurement of fiber optic windings can save a lot of renovation costs and time for the future construction of intelligent substations.

110kV Oil Immersed Traction Transformer

3.Best practices and common problem warnings for operation and maintenance

Proper operation and maintenance are the guarantee for extending the lifespan of equipment.

3.1 Regular fuel analysis is the core of “physical examination”

It is necessary to regularly analyze the breakdown voltage, moisture content, acid value, and dissolved gases of transformer oil. Especially gas analysis can detect latent faults such as discharge and overheating early.

3.2 Pay attention to connection points and cooling systems

Regularly check the fastening and temperature rise of the connecting parts such as sleeves and cable joints. At the same time, ensure that auxiliary equipment such as cooling fans and oil pumps operate normally, as they are the “guardians” of the cooling system.

3.3 Common problem warning

Abnormal increase in oil temperature: It may be due to overload, cooling system failure, or internal heating defects.
Deterioration of insulating oil: manifested as an increase in acid value and darkening of color, requiring timely treatment or replacement.
Abnormal noise: It may be caused by loose internal components or harmonic interference from the power grid.

Investing in a high-quality 110kV oil immersed railway traction transformer is a long-term strategic decision. Only by focusing on its energy efficiency, overload capacity, intelligent potential, and full lifecycle cost, supplemented by scientifically rigorous operation and maintenance strategies, can we maximize the safety, reliability, and economic operation of the railway power supply network.

Luoyang Datang Energy Technology Co., Ltd. is a high-tech enterprise integrating R&D, manufacturing and supply of power equipment such as transformers, new energy components, distribution cabinets and inverters. With technological innovation as the core, we focus on creating high-reliability and high-performance power solutions to serve global customers. With a strict quality control system and international standard certification, we continue to output excellent products and enable customers to build safe and stable power systems.