Modified natural ester insulating oil special for power transformer and preparation method of modified natural ester insulating oil

Through gradient enzymatic lysis and composite bacteria fermentation methods, the natural ester insulating oil is modified to solve the viscosity, thermal conductivity, compatibility and oxidative stability problems in power transformers, significantly improve dielectric strength and thermal stability, and meet the application needs in high load and low temperature environments.

CN119709287AActive Publication Date: 2025-03-28JIANGSU SHUANGJIANG ENERGY TECH CO LTD
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Patent Information

Application Number
CN202411899752.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2025-03-28
Estimated Expiration
2044-12-23

AI Technical Summary

Technical Problem

Natural ester insulating oil has problems such as viscosity and temperature characteristics, low thermal conductivity, compatibility problems, differences in electrical performance, oxidation stability and limited low-temperature applications in power transformers, making it difficult to meet the needs of high load and low-temperature environments.

Method used

Through gradient enzymatic lysis and complex bacteria fermentation methods, the physical and chemical properties of natural ester insulating oils, including enzymatic lysis, fermentation, decolorization, water removal and addition of modified adsorbents, antioxidants and anticoagulants of soybean oil, are optimized.

Benefits of technology

The dielectric strength, pour point, thermal stability and oxidation resistance of the insulating oil are improved, and its performance under low temperature and high load conditions is enhanced, which meets the actual needs of power transformers.

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Abstract

The invention provides special modified natural ester insulating oil for a power transformer and a preparation method of the special modified natural ester insulating oil. The preparation method comprises the following steps: (1) preparing soybean oil; (2) adding the modified adsorbent into the soybean oil, stirring at 70-75 DEG C for 8-10 hours, and filtering to obtain impurity-removed soybean oil; and (3) decolorizing the impurity-removed soybean oil, filtering the soybean oil with the pore diameter of 10 microns, stirring the soybean oil in a vacuum environment at 100 DEG C for 5-6 hours to remove water, adding an antioxidant and an anticoagulant, dissolving the antioxidant and the anticoagulant, and uniformly stirring the antioxidant and the anticoagulant to obtain the special modified natural ester insulating oil for the power transformer. The prepared modified natural ester insulating oil special for the power transformer is excellent in performance, and the index requirements of the insulating oil special for the power transformer are met.
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