We have been working on the development of virtual measurement technology for predicting the thermal deformation of steam turbine utilizing model order reduction (MOR) technology that enables high-speed and high-precision numerical prediction with mathematical reduction of finite element analysis (FEA) models. This report describes the application of this virtual measurement technology to actual equipment and the realization of real-time prediction of a steam turbine radial clearance with an accuracy comparable to that of FEA. This technology is useful for enhancing clearance management resulting in improvement of performance and safety and is expected to contribute to improving the flexibility of thermal power generation.
