FOSA Case Studies & Papers
Fiber optic sensing examples and technical papers.
Modern combined cycle power plants, with state-of-art gas turbines and steam turbines coupled to air-cooled or H2-cooled electrical generators, are highly refined technology concepts offering unmatched excellence in operation, reliability, and environmental friendliness. While generator core failures aren’t common, their potential impact is up to the catastrophic level. One yet-unsolved issue is the occasional development of hot spots in the stator core, where thousands of insulated carbon steel laminates are tightly pressed and clamped together. Brillouin scattering based distributed strain and temperature sensing (DSTS) provides an excellent opportunity for power generator applications, because it is unaffected by electromagnetic interference (EMI) and vibration. DSTS shows great promise in advancing core protection by permitting measurement of distributed temperatures along an entire optical fiber as the sensing element rather than at discrete points, thus achieving a true distributed sensing function.