The shift of maintenance strategy from planned or
time-based to condition-based maintenance is an
inevitable trend. The main target of condition-based
maintenance (CBM) is to make comprehensive analyses
for the service or technique status of power equipment,
guided by the fundamental ideas of systems engineering.
In the CBM strategy, all the helpful information is
collected and evaluated synthetically, and then the most
reasonable judgment may be determined for power
equipment, including the technique status and its
evolving tendency ['I. Mastering the accurate service
situation of power equipment, feasible countermeasures
could be taken and optimum maintenance decision
could be made to avoid unexpected failure and to
decrease unnecessary economical losses.