New Horizon of Oil Level Monitoring - Intelligent Guarding of Electric Heart

New Horizon of Oil Level Monitoring - Intelligent Guarding of Electric Heart

Behind the safe operation of the power system, the transformer oil level gauge is like a silent sentinel. When you open this official account, you will get not only dry goods of oil level monitoring technology, but also a complete set of solutions to ensure the healthy operation of equipment. Behind the safe operation of the power system, the transformer oil level gauge is like a silent sentinel. When you open this official account, you will get not only dry goods of oil level monitoring technology, but also a complete set of solutions to ensure the healthy operation of equipment.

The analysis report of a substation accident in 2022 shows that 63% of transformer failures are directly related to abnormal oil levels. The oil level gauge is not only a simple liquid level indicator device, but also a barometer of the health status of transformers. When the oil temperature changes and causes the oil volume to expand, the magnetic transmission oil level gauge uses a floating ball linked pointer, and the error range needs to be controlled within ± 2.5%.

The new capacitive oil level monitoring system has achieved a measurement accuracy of ± 0.5%, and with temperature compensation algorithm, it can automatically convert the standard oil level value of 20 ℃. The measured data of a 500kV substation shows that intelligent oil level monitoring has advanced the fault warning time by 72 hours, winning the golden window period for emergency repairs.

Daily inspections should focus on the condition of the oil level gauge sealing ring, as the oil resistance of silicone rubber material is 40% higher than that of nitrile rubber. A case study of a power plant showed that the average annual oil replenishment caused by seal ring cracking reached 380L, which was reduced to 12L after replacing with new sealing materials.

In extreme temperature difference environments, it is recommended to use an oil level gauge with a bimetallic compensation device. In the operating conditions of -30 ℃ to+80 ℃, traditional oil level gauges will produce a 7% deviation in indication, while compensating products can control the error within 1.5%.

Comparison of cost between pointer type and electronic type: The initial purchase price difference is 3-5 times, but the operation and maintenance cost of electronic type is only 17% of traditional type. According to calculations by a provincial power grid company, the electronic cost of the entire lifecycle has actually decreased by 42%.

Explosion proof oil level gauges must pay attention to the Exd Ⅱ BT4 certification mark, and the shell thickness must be ≥ 3mm. It is recommended to use fiber optic sensing technology for special working conditions. An application case in a chemical industrial park shows that its anti electromagnetic interference ability has been improved by 300%, and its service life has been extended to 15 years.