How to deal with transformer oil filtration and gas exceeding the standard?
2020/4/2??????view:
The transformer is an important equipment of the substation, which has a great influence on the stable operation of the power system. Through data collection and research, it is found that the gas content in the oil (CO + CO2) can well reflect the polymerization degree of the insulating paper in the transformer oil, and judge the service life of the transformer from the aging rate of the oil paper insulation, so the increase of the gas content in the oil of the oil transformer will add The rate at which the insulation ages.
The generation mechanism of gas in transformer oil is very complex, some of which have not been fully understood. In addition, the gas content is closely related to many factors such as oil type, solid insulation material, oil protection mode, transformer structure, temperature, pressure, operation life, etc.
Transformer oil contains carbon monoxide, carbon dioxide, methane, ethane, acetylene, ethylene, hydrogen and other gases. The transformer oil in use needs to be tested for acetylene content, which can be obtained through chromatographic analysis. If it is to detect the total air content in the transformer oil, it is necessary to use an insulating oil air content tester.
No matter whether the oil contains inflammable and explosive acetylene or the total gas content exceeds the standard, it will seriously affect the insulation performance of the oil. Therefore, when the detection is unqualified, the vacuum degassing filter device must be used to remove the gas or effectively reduce the treatment of the transformer oil.
Especially when acetylene is found, ZJA two-stage vacuum oil filter must be used for vacuum degassing and purification, because it is also an essential oil treatment equipment for many power plants and power maintenance companies! It is worth mentioning that acetylene in many new transformer oil is left behind due to the imperfect performance of ordinary real air oil filter, but ZJA two-stage vacuum oil filter with excellent performance It can ensure that acetylene is zero. It adopts a two-stage vacuum unit, which can rapidly improve the overall vacuum degree and pumping rate, and quickly remove the moisture, gas and impurity particles in the transformer oil at a lower temperature, which can effectively shorten the installation and maintenance period of the transformer.
Under the action of heat and electric field, the contact between oil and oxygen is gradually oxidized to various oxides, alcohols, aldehydes, acids, etc. Finally, insoluble colloids and sludge precipitate. These acids reduce the insulation performance of the transformer, so the transformer oil must be filtered.
There are two forms of water and gas in oil: dissolved water and gas (below the saturation point) exist in most oil systems and equipment, while free water and gas (above the saturation point) exist in many oil.
Water and gas in the air settle in the oil due to system leakage, loose sealing, long-term oil heat load, open oil storage and other reasons, resulting in water and gas in the oil.
The untreated transformer oil has moisture content of 50-60ppm and air content of 10% - 20%. In order to make the oil reach the target, it must be treated under the rated vacuum and temperature to remove water, Degas and mechanical impurities.
The dielectric properties of oil depend largely on the water content, gas content, impurities and pollution degree of oil. Even new oil will absorb gas and water during storage and transportation, so the oil needs to be filtered before use. In addition, the oil should be degassed regularly in the use process, because the dielectric properties of oil will be affected by gas and water under different temperature conditions.
Application and characteristics of transformer oil filter
Application: it can quickly remove moisture, gas and impurity from insulating oil, reduce dielectric loss, improve insulating property and oil quality. It can effectively ensure the normal operation of power equipment and avoid accidents.
Features: the machine can meet the requirements of vacuumizing the transformer body at the installation or maintenance site, degassing and dehydrating the transformer oil at the same time, and shortening the oil treatment period. It integrates precise filtration, efficient dehydration, degassing, vacuum three-dimensional evaporation technology and automatic control technology of oil, with simple operation, safe and reliable operation.
1. It has the advantages of high filtration precision, large pollutant holding capacity and can remove fine suspended particles in oil.
2. The evaporation area of the unique degassing and dehydration materials is hundreds of times larger than that of the conventional materials.
3. This machine has the characteristics of small size, high efficiency and convenient movement, especially suitable for live working on site.
4. The system adopts the advanced fuzzy oil temperature device, which can set the upper and lower limits of oil temperature arbitrarily, so that the oil temperature can be controlled in intervals.
5. High degree of automation, automatic control and protection of oil level, safe and reliable, simple and convenient operation.
For more information, please refer to the product catalog and industry cases on the company's official website. If you need product information and videos, please open the contact information - call or add a telephone wechat.
- Pre：What is the significance of fi 2020/4/2
- Next：How to filter hydraulic oil an 2020/4/2