Nils-Michael Theune

Investigation of stator coil and lead temperatures on high voltage inside large power generators via use of fiber Bragg gratings

This paper reports on the first realisation of embedding fiber Bragg grating temperature sensors inside the stator bars and onto the leads of a 200 MVA air cooled power generator. The worlds first measurements of the conductor temperature at high potential during a generator prototype test run demonstrates the feasibility and importance of this measuring technology.

New approaches for the monitoring of gas turbine blades and vanes

Gas turbines for power generation are being operated on the physical limits of materials and structures. A safe operation requires more monitoring of critical components. Optical, acoustic and RF waveguides could be used to access the harsh environment inside of gas turbines for monitoring purposes.

Fiber bragg gratings for the measurement of direct copper temperature of stator coil and bushing inside large electrical generators

This paper reports on the first realisation of embedding fiber Bragg grating temperature sensors inside the stator bars of a large air cooled power generator. Furthermore first measurements of the conductor temperature inside the bushings have been carried out during a generator prototype test run.