Abstract
Turbine generator sets (gas and/or steam turbine plus generator) operating at their rated speed under non-steady-state conditions normally show transient changes of shaft and bearing vibration. These vibration changes are generally associated with thermal variations of the rotor support structure or thermal effects within the rotor shaft line. For the turbogenerator rotor the changes of shaft and bearing vibrations may be due to the increase of rotor field current during initial loading or due to a change of rotor field current during load changes. To achieve that on-site vibration behaviour of the generator rotor is acceptable Alstom has introduced the so-called heat run test in the mid 1960s. As part of the internal factory acceptance tests in the spin pit, the heat run test is carried out after the balancing of the rotor by injecting direct current into the rotor field winding at rated speed and monitoring of the winding temperature and the first order shaft and bearing vibrations.
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References
L’vov MM, Gardner WC, Uriev EV (2006) Application of vibration and rotor dynamic analyses for evaluation of amplitude hysteresis at first mode for a generator rotor in a high-speed balancing facility. In: IFToMM 2006, Vienna, Austria
Zawoysky RJ, Genovese WM (2001) Generator rotor thermal sensitivity—theory and experience, GE power systems, publication GER-3809
ISO7919-2: Mechanical vibration—evaluation of machine vibration by measurement on rotating shaft—part 2: land-based steam turbines and generators in excess of 50 MW with normal operating speeds of 1500 r/min, 1800 r/min, 3000 r/min and 3600 r/min
ISO10816-2: Mechanical vibration—evaluation of machine vibration by measurements on non-rotating parts—part 2: land-based steam turbines and generators in excess of 50 MW with normal operating speeds of 1500 r/min, 1800 r/min, 3000 r/min and 3600 r/min
Rotzinger R, de Pietro R, Booth R (2001) Risk analysis on turbogenerator rotors and recommendations. In: EPRI conference, USA
Kellenberger W (1987) Elastisches Wuchten. Springer, Berlin
Vania A, Pennacchi P, Chatterton S (2013) Identification of a shaft thermal bow by means of model-based diagnostic techniques. In: Surveillance 7 international conference. Chartres, France
Pennacchi P, Vania A (2004) Accuracy in the identification of a generator thermal bow. J Sound Vib 274:273–295
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The authors like to thank Alstom for allowing this publication.
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© 2015 Springer International Publishing Switzerland
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Irwanto, B., Eckert, L., Prothmann, T. (2015). Thermal Unbalance Behaviour of Turbogenerator Rotors. In: Pennacchi, P. (eds) Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Mechanisms and Machine Science, vol 21. Springer, Cham. https://doi.org/10.1007/978-3-319-06590-8_183
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DOI: https://doi.org/10.1007/978-3-319-06590-8_183
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