On the basis of the structure and characteristics of single-ring sealing oil system in hydrogen cooled generator

the factors affecting hydrogen purity of the generator were analyzed. The impurity gas in the hydrogen and the dissolved gas in the sealing oil were analyzed

and the comparison between them shows that

the basic reason for the decrease of hydrogen purity is the gas pollution in the sealing oil. Moreover

the improvement measures for the single-ring sealing oil system were proposed

which can control the content of impurity gas in the sealing oil at a low level and eliminate its pollution to hydrogen in the generator. The improvement measures take the remarkable effect to reduce the amount of hydrogen supplement especially the amount of purification and keep the purity of hydrogen in stable

which provide a new way for the analysis and solution of similar problems in domestic units.