Research and Analysis on Microscopic Change Process of Transformer Storage with Nitrogen and No Oil for Long Time

Large transformer is normally filled with nitrogen for storage and transportation, according to the performance of the insulating material, the detailed manufacturing process of the transformer, The thesis analyzed microcosmic change progress from three parts for long time storage of transformer with nitrogen; one is that minim moisture in nitrogen gas impact insulation performance, other one is that aging and degradation of insulation, the other one is that cavity and bubble happened in transformer. And verify the correctness of the micro-analysis and the effectiveness of the measures based on the actual engineering case, provided reference and practical experience for the subsequent nitrogen storage management of transformers.