What is an oil immersed transformer?
An oil immersed transformer is a common type of transformer that uses insulating oil for cooling and insulation of internal components. It consists of two or more coils (primary and secondary windings) and a core. These coils and the core are immersed in insulating oil to maintain their cooling and insulation properties.
Specific structural composition:
Iron core: It is usually made of stacked silicon steel sheets to reduce hysteresis loss and eddy current loss and improve the operating efficiency of the transformer.
Winding: It is the conductive part of the transformer and usually wound with insulated copper wire or aluminum wire. The structure and layout of the winding have an important impact on the performance of the transformer.
Transformer oil: As an insulating and heat dissipation medium, it has good insulation performance and thermal stability, which can ensure the normal operation of the transformer at high temperatures.
Oil tank: Usually adopts a sealed structure to prevent external impurities and moisture from invading, ensuring the safe operation of the transformer.
Working principle of oil-immersed transformer
The working principle of oil-immersed transformer is based on the law of electromagnetic induction. One side of the winding (primary winding) receives the input voltage and generates an AC magnetic field. This magnetic field induces a magnetic flux in the iron core, which in turn induces a voltage in the other side of the winding (secondary winding). By adjusting the turns ratio of the primary winding and the secondary winding, the voltage can be increased or decreased.
Advantages and Disadvantages of Oil-Immersed Transformers
Advantages:
·High efficiency, reliable, suitable for high power occasions.
·Good insulation performance, suitable for harsh environments.
·Transformer oil can effectively cool the equipment and increase life.
·Excellent heat dissipation performance
·Lower noise and vibration
Disadvantages:
·Oil leakage is prone to occur, and the maintenance cost is high.
·Oil-immersed transformers are heavy and require high installation.
·Higher flammability and increased fire risk.
·Poor short-circuit resistance
What are the main application areas of oil-immersed transformers?
1. Power industry
In the power industry, oil-immersed transformers are one of the important components of the power grid, and their application areas are wide and core.
Power plant: Oil-immersed transformers play the role of boosting in power plants. The oil-immersed transformer boosts the electric energy generated by the generator and transmits it to the power grid. This step is crucial for the long-distance transmission of electric energy, because boosting can reduce line losses and improve transmission efficiency.
Power grid system: In the power grid, oil-immersed transformers are used to reduce the voltage of high-voltage electric energy and supply it to users. This conversion process ensures a safe and stable supply of electric energy and meets the electricity needs of different users.
Power transmission and distribution system: Oil-immersed transformers are also used for power distribution in power transmission and distribution systems, distributing electric energy to various power-consuming equipment. In addition, non-partial discharge oil-immersed test transformers can be used to perform partial discharge and power frequency withstand voltage tests on transformers in substations and power transmission and distribution systems to ensure the stability and safety of the power system.
2. Industrial use
Power supply for industrial equipment: The industrial field usually requires the use of electric energy at different voltage levels to meet the needs of different equipment. Oil-immersed transformers can provide stable and reliable voltage conversion to ensure the normal operation of industrial equipment. Many industrial facilities and enterprises use oil-immersed transformers to supply the power required by their internal equipment and machines.
Special environment application: The tank of the oil-immersed transformer is filled with insulating oil, which enables it to work in polluted or humid environments. Therefore, in some special environmental conditions, such as chemical plants, mines, etc., oil-immersed transformers are widely used.
3. Urban power distribution
Urban power distribution network: The urban power distribution system usually operates with a specific voltage (such as 35KV) as the reference voltage. Oil-immersed transformers play a key role in the urban power distribution network. They convert high-voltage electricity into low-voltage electricity suitable for residential, commercial and office areas.
Maintenance and safety considerations for oil immersed transformers
Oil immersed transformers have maintenance and safety precautions. Proper maintenance of the transformer can extend its lifespan and reduce the risk of safety issues.
Regular visual inspections and cleaning are essential. Inspect the transformer to ensure all components are in good condition without any threat of leaks. Ensure all fittings are tightened. Clean the external and internal parts of the transformer to remove dust, dirt, and other debris.
Regularly checking the oil is also crucial. Ensure the oil is at the proper level. You should also collect oil samples and perform tests. You do not want to use contaminated oil. Lastly, pay attention to temperature and pressure. Ensure the transformer is within the recommended levels.
As with any electrical equipment, there is always a risk of fire. It is crucial to ensure that oil does not leak from the transformer in case of a fire. Oil can cause the fire to spread, making the situation more dangerous.
What are the selection and precautions of oil-immersed transformer?
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Basic parameter selection
Capacity: Capacity is one of the most critical indicators when selecting a transformer.
Rated voltage: Choose the transformer according to the rated voltage of the power supply system. Make sure the rated voltage of the transformer matches the rated voltage of the power supply system.
Rated frequency: The frequency of the oil-immersed transformer should be consistent with the grid frequency, usually 50Hz or 60Hz. When selecting, make sure that the frequency of the selected transformer matches the grid frequency.
2. Load requirements
Determine the rated capacity of the transformer according to the load requirements.
3. Insulation level
The insulation level determines the voltage resistance and insulation performance of the transformer.
4. Cooling method
There are usually two cooling methods for oil immersed transformers: natural cooling and forced cooling. Natural cooling is cooling through the transformer’s own heat dissipation, which is suitable for small-capacity transformers; forced cooling uses cooling equipment such as fans or pumps to enhance the cooling effect, which is suitable for large-capacity transformers. When choosing a cooling method, factors such as the transformer’s load and ambient temperature need to be considered.
5. Operating environment and installation location
For harsh climate conditions such as high temperature, heavy rain, and humidity, transformers with a strong protection level should be selected. The choice of installation location also needs to consider the operation and maintenance needs of the transformer.
6. Brand and quality
Purchase oil-immersed transformers from well-known brands to ensure reliable product quality and stable performance.
7. Price
Users should make reasonable plans based on actual needs and economic capabilities and choose products with high cost performance.
Where To Purchase Your Oil Immersed Transformer?
When you’re looking for an oil immersed transformer manufacturer, ZTelecgroup is your rightful source.
ZTelecgroup ‘s oil immersed transformers can keep your electrical network running smoothly.
Moreover, ZTelecgroup is well recognized as a market leader in oil-immersed transformer manufacturing.
We have both dry and oil-immersed distribution transformers, so you can pick the one that works best for you.
Additionally, ZTelecgroup offers their clients proper tutorials on oil immersed transformer.
Overall, ZTelecgroup’s oil immersed transformers are user-friendly, and they may be highly modified in a variety of ways to fulfill the specific requirements of each client.
