Abstract: Taking the leakage fault diagnosis of a double-water internal-cooling generator in an overseas power plant as an example, this paper analyzes the difference of leakage water quality and leakage morphological characteristics. In this paper, the leakage fault of rotor winding of double-water internal-cooling generator is rapidly diagnosed under the limited field condition without shutdown, and the causes of leakage are analyzed by the opportunity of shutdown.

Key words: generator rotor, water leakage fault, water quality analysis