Method and Application of Wedge Tightness Measurement for Large Vertical Hydrogenerator Based on Sound Perception

Due to aging, vibration, wear and other reasons, the stator slot wedge loosens during long-term operation of large vertical hydro-generator set, which will cause serious harm such as insulation wear and mechanical damage to the stator rod. This paper introduces a method of generator slot wedge tightness detection based on sound perception, and introduces its application theory, design and real machine detection in detail. This method can realize the detection of stator slot wedge looseness of large vertical hydro-generator set without hanging rotor, improve the technical level of generator operation and maintenance of equipment operation and maintenance units, and provide support for the improvement of generator operation reliability.