Applying the equivalent operating hours principle for assignment of CCPP equipment maintenance period

Abstract

CCPP cyclic load changes required the thermal stress and cyclic strength operational control of the steam path "critical" elements. Accumulated damage and residual life assessment are necessary for timely equipment maintenance. The basis of maintenance activities planning is the accounting of the resource consumed by "critical" equipment elements during operation. The creation of on-line mathematical models of steam path "critical" elements is carried out on the way of their sequential simplification with the aim of obtaining simple for implementation models adequately reflecting the physical processes occurring in them. The program of operational control of equivalent operating hours accumulated by CCPP steam path "critical" elements allows to estimate their thermal stress state and cyclic strength by processing operational measurements. Collection and processing data on CCPP equipment failures from the point of view equivalent operating hours accumulated by the time of failure give an ability to form schedules of preventive measures that is inspections.