Release date：2026-01-23  View count：0

Customer profile: A large provincial substation, responsible for the power supply of industry and residents in the region, has 5 main transformers, daily use of insulating transformer oil as insulation and cooling medium, the total oil capacity reaches 8000L, and the average daily circulation is about 3000L. Because the substation is located in a rainy and humid area, the transformer oil is easy to absorb moisture, mix with fine impurities and dissolved gases, and has extremely high requirements for oil insulation performance, which needs to comply with the GB/T 7595-2017 standard of the power industry to ensure the safe and stable operation of the power grid.

Core pain points：1. The humid environment leads to the water content of transformer oil exceeding the standard (up to 0.15%), the dissolved gas content is high, the insulation performance is reduced, the insulation resistance value is not up to standard many times, and there is a risk of short circuit and tripping of equipment. 2. Traditional oil filtration equipment can only remove oil slicks and large particles of impurities, and cannot effectively remove dissolved water and tiny bubbles, and the oil deteriorates quickly, and the transformer oil needs to be replaced every 2 years, and the annual maintenance cost is high. 3. Oil maintenance needs to be stopped, affecting the continuity of power supply, and the loss is about 80,000 yuan per stoppage; 4. Waste transformer oil is a hazardous waste, with a treatment cost of 3500 yuan/ton, high annual waste oil treatment costs, and high environmental compliance pressure.

Solution: Vacuum dehydration oil purifier is selected, using a two-stage vacuum pump system, the vacuum degree is up to -0.098MPa, the dewatering speed is increased by 60% compared with the single-stage pump, integrating vacuum dehydration, coalescence separation and multi-stage precision filtration triple technology, the processing capacity is 3000L/h, which can efficiently remove dissolved water, free water and dissolved gas in the oil, the filtration accuracy reaches NAS level 6, and can intercept fine impurities with a particle size of ≥ 1μm. The equipment is equipped with an online micro-hydrometer and intelligent control system, which monitors the water content of the oil in real time, automatically start-stop and dehydration program, supports the unit to be cleaned online without stopping, adopts an integrated design, compact, convenient installation and commissioning, and adapts to the continuous operation needs of the substation.

Application effect：1. The oil dehydration effect is remarkable, the water content is reduced from 0.15% to less than 0.03% (in line with GB/T 7595-2017 standard), the dissolved gas removal rate is more than 90%, the insulation resistance value is increased by 3 times, completely eliminating the hidden dangers of short circuit and tripping of the equipment, and the operation stability of the equipment is greatly improved. 2. The service life of transformer oil is extended from 2 years to 6 years, reducing transformer oil consumption by 6 tons per year, and saving 180,000 yuan in oil procurement costs. 3. Realize non-stop online purification, avoid downtime power supply losses, and reduce downtime losses by 320,000 yuan per year; 4. The emission of waste transformer oil is reduced by 75%, the annual cost of hazardous waste treatment is saved by 42,000 yuan, the energy consumption is reduced by 25%, and the whole life cycle cost is reduced by 40% compared with the traditional scheme, and it has successfully passed the special test of the power industry.