Recently, Jiangsu Shuangjiang Energy Technology Co., Ltd. has been making continuous efforts in the field of power insulating oil and has achieved another remarkable success! The invention patent "A Modified Natural Ester Insulating Oil for Power Transformers and Its Preparation Method" has been authorized by the National Intellectual Property Administration! The highlights of the patent technology are: 

The present invention belongs to the technical field of insulating oil, and specifically relates to a modified natural ester insulating oil for power transformers and its preparation method. Compared with the existing technology, the advantages and beneficial effects of the present invention are as follows: 

The present invention, by using a gradient enzymatic hydrolysis method and applying specific enzymes in sequence for enzymatic hydrolysis, can improve the dielectric strength of modified natural ester insulating oil dedicated to power transformers. 

2. After the gradient enzymatic hydrolysis, this invention further uses a compound bacteria for fermentation, which can improve the pour point of the modified natural ester insulating oil specially designed for power transformers. 

When a specific amount of enzymes and bacteria are added, the dielectric strength of the modified natural ester insulating oil dedicated to power transformers can be improved after long-term storage, maintaining excellent electrical performance and chemical stability during the long storage period. 

The oleophilic modified adsorbent prepared by the present invention can improve the thermal stability and oxidation resistance of insulating oil by removing polar impurities and oxidation products, and maintain the stability of its dielectric strength.