It analyzes the working principle and structural characteristics

and then elaborates on the preparatory work before system commissioning

the key technical points during the commissioning process

and the diagnosis and treatment measures for typical abnormal situations.Through practical cases

it analyzes the common fault phenomena such as the decrease in hydrogen purity

fluctuations in sealing oil pressure

and oil ingress into the generator during system operation

as well as their root causes

and proposes targeted optimization suggestions and maintenance strategies.It provides a reference for improving the operational reliability of the sealing oil system of hydrogen-cooled generators.