Abstract: In Thermal Power Plant of Power Division of Guangzhou Branch of China Petroleum&Chemical Group, the vibrations of No.3 and No.4 shafts of No.1 turbogenerator set were higher and influenced the unit’s safety operation. After field test of high speed balance by double balance method, obvious effect has been obtained, the shaft vibration values have reached favorable level. The experiment method can be considered as a reference to check and treat faults for unit’s safe operation.

Key words: shaft vibration, balance weight, high speed balancing test, double balance method, turbo-generator set