Purpose of transformer hot oil circulation
2024-08-09
The main purpose of hot oil circulation in transformers is to solve the problem of moisture on the surface of the body. This process increases the temperature of oil by heating the oil inside the transformer, thus effectively solving the moisture problem on the surface of the body. The operation steps of hot oil circulation include connecting the oil storage tank, oil filter, transformer oil pipeline, start the vacuum pump vacuum, check the transformer oil samples to meet the oil injection nitrogen oil quality requirements for oil injection, start the oil filter for circulation heating and so on. This process has an important impact on the performance and life of the transformer, by optimising the performance of the transformer to extend its service life.
Operating steps and precautions for hot oil circulation
Connect the oil storage tank, oil filter and transformer oil pipework: ensure that all connections are tight and free from leaks.
Start the vacuum pump to evacuate: check that there is no air left inside the transformer.
Check the transformer oil sample: make sure the oil quality meets the requirements.
Oil injection: inject from the top valve of the body, pay attention to control the oil injection speed and pressure.
Start the oil filter for circulation heating: control the oil filter outlet oil temperature between 50 ~ 70 ℃, ensure that the transformer body temperature exceeds 20 ℃ to stop circulation heating.
The influence of hot oil circulation on transformer performance
Insulation: transformer oil has much higher insulation strength than air, through the hot oil circulation can further improve the insulation performance.
Heat dissipation: the heat generated during the operation of the transformer is dispersed through the up and down convection of the oil to ensure the normal operation of the transformer.
Arc extinguishing effect: under the action of high temperature of arc, transformer oil can contact a large number of gases, improve the arc extinguishing performance, so that the arc is quickly extinguished.
Through the implementation of the above steps and precautions, hot oil circulation not only solves the moisture problem on the surface of the body, but also optimises the performance of the transformer and prolongs its service life.
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