Analysis Of Typical Pollution Particles In Transformer Oil

It is difficult for Transformer oil to avoid contacting with many particulate pollutants in normal operation.These particulate pollutants will accelerate the aging of Transformer oil,change the composition of oil,affect the physical and chemical properties of oil,and bring great harm to the normal operation of transformer.Therefore,if advanced analysis technology can be adopted to analyze the aging status of oil containing particulate pollutants and obtain the morphological characteristics of particulate pollutants in Transformer oil aging,it will be helpful to judge the latent fault of internal insulation materials of transformer and ensure the stable operation of transformer.The main contents of this paper are as follows:1.Get the difference of physical and chemical properties of Transformer oil containing different particulate pollutants.Through the accelerated aging experiments of oil paper insulation and various particulate pollutants,the Transformer oil samples containing typical particulate pollutants were obtained;through the regular detection of oil physical and chemical performance indexes,the change law of oil physical and chemical indexes was studied;according to the Transformer oil detection standard GB / T 7595-2008,the aging operation status of oil containing particulate pollutants was judged.The results show that there is little difference in the effects of various particulate pollutants on the physicochemical indexes of oil at the early stage of aging,but there is significant difference in the effects of metal particulate pollutants and non-metal particulate pollutants on the physicochemical indexes of oil at the later stage of aging.2.Obtain the spectrum difference of Transformer oil containing different particulate pollutants.Firstly,the changes of infrared spectra of Transformer oil under different temperature,different thermal aging time and different electric breakdown times were explored;secondly,the infrared spectra of Transformer oil with different particulate pollutants were compared;finally,the changes of particulate pollutants in oil were monitored by disk rod electrode spectroscopy.The results show that the composition of Transformer oil is affected by temperature and aging time,but not by electric breakdown times;there is no significant difference in the infrared spectrum peak position of the oil containing metal,inorganic solid and other particulate pollutants,while the peak position and peak value of the infrared spectrum of the oil containing aldehydes,ketones and other oxidized particulate pollutants change significantly;the content of metal elements in the oil increases first and then decreases The copper content in the oil remained the highest.3.Using traditional Ferrograph to detect and identify typical particulate pollutants in oil,and build characteristic particulate pollutant spectrum library.Through the transformation of the existing Ferrograph,we can clearly observe the shape,size,morphology and structure of small and mediumsized particles in the oil;study the settlement law of particles on the Ferrograph,and determine the Ferrograph observation scheme of non-magnetic particles;use image pro image processing software to identify the characteristic parameter information of particle pollutants in the Ferrograph image;use Excel database to integrate and summarize the iron content of particle pollutants The detailed ferrography database of particulate pollutants in Transformer oil is constructed based on the data of spectrum slice,particle parameter information,physical and chemical properties of oil affected by particulate pollutants,spectral difference,pollutant element content in oil,etc.The results show that the ferrography analysis method is effective,and the spectrum library is helpful for researchers to identify the particulate pollutants in Transformer oil and fault diagnosis of equipment.