Research on short-term maintenance risk decision model of power plant equipment

Aiming at the problem that power stations make maintenance decision just according to the operation time and operation condition and the maintenance optimization of the whole maintenance unit can't be realized,a frame of short-term maintenance risk decision is put forward,and the risk decision model is built.In the model,equipment technical health,maintenance interval,overhaul and minimal maintenance constrains,and the maintenance/failure cost of equipment in all operation and maintenance modes are used.The best maintenance schedule is gained by using decision tree algorithm.It is applied to make maintenance risk decision of water-feed pump set,by using maintenance constrains,maintenance costs and the results of equipment condition evaluation,a best maintenance schedule corresponding to the object of lowest maintenance/failure cost is determined.The computation example shows that the model is feasible and effective,and can be used as a powerful support next in making effective maintenance decision of power station equipment.