Abstract: n this paper, the case analysis on the vibration problems and their trouble-shooting for some steam turbines, generators, the driving motor of condensate water pumps and raw gas booster fans conducted in the past few years are presented. The analysis illustrates the actual application and effects of vibration fault diagnosis and control techniques. These faults involve bearing failure, generator dynamic inter-turn short circuit, structure resonance and unstable mass unbalance. In each case, the comments on the conclusion of diagnosis are put forward for reference.

Key words: power plant, vibration, case analysis, fault diagnosis, vibration control