Blade damage evaluation apparatus, blade damage evaluation method, and blade damage evaluation program

A blade damage evaluation method comprising steps of:

• registering design information on a turbine and a peripheral device of the turbine, the turbine having a plurality of blades configured to rotate a rotor by being subjected to a jet of steam or gas;
• registering maintenance information on work history that contributes to reduction in solid particles to be mixed into the steam or gas;
• acquiring and storing detection data from sensors provided in the turbine and the peripheral device;
• discriminating first facility states of the turbine at a plurality of past time points based on the design information and the maintenance information;
• classifying each of the first facility states into one of classes;
• determining first operating state values of the turbine based on the detection data acquired at past time points;
• acquiring first damage rates of the blades at the past time points;
• setting a characteristic function indicating relationship between a first operating state value and a first damage rate for each of the classes;
• discriminating a second facility state of the turbine at a current time point based on the design information and the maintenance information;
• determining a second operating state value of the turbine based on the detection data acquired at the current time point;
• and
• analyzing a second damage rate at the current time point corresponding to the second operating state value based on the characteristic function that is set to a class corresponding to the second facility state.

A computer-readable blade damage evaluation program that allows a computer to perform:

• a registration process of registering design information on a turbine and a peripheral device of the turbine, the turbine having a plurality of blades configured to rotate a rotor by being subjected to a jet of steam or gas;
• a registration process of registering maintenance information on work history that contributes to reduction in solid particles to be mixed into the steam or gas;
• an acquisition process of acquiring and storing detection data from sensors provided in the turbine and the peripheral device;
• a discrimination process of discriminating first facility states of the turbine at a plurality of past time points based on the design information and the maintenance information;
• a classification process of classifying each of the first facility states into one of classes;
• a determination process of determining first operating state values of the turbine based on the detection data acquired at past time points;
• an acquisition process of acquiring first damage rates of the blades at the past time points;
• a setting process of setting a characteristic function indicating relationship between a first operating state value and a first damage rate for each of the classes;
• a discrimination process of discriminating a second facility state of the turbine at a current time point based on the design information and the maintenance information;
• a determination process of determining a second operating state value of the turbine based on the detection data acquired at the current time point;
• and
• an analysis process of analyzing a second damage rate at the current time point corresponding to the second operating state value based on the characteristic function that is set to a class corresponding to the second facility state.