Title:	ERROR CONSIDERATIONS FOR TURBINE-GENERATOR TORSIONAL VIBRATION MONITORING
Authors:	Liška, Jindřich Jakl, Jan Künkel, Sven
Citation:	LIŠKA, J. JAKL, J. KÜNKEL, S. Error considerations for turbine-generator torsional vibration monitoring. In: Proceedings of the ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. Volume 5: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage. Neuveden: ASME, 2020. s. 1-6. ISBN 978-0-7918-8414-0.
Issue Date:	2020
Publisher:	American Society of Mechanical Engineers
Document type:	konferenční příspěvek conferenceObject
URI:	2-s2.0-85099790735 http://hdl.handle.net/11025/43017
ISBN:	978-0-7918-8414-0
Keywords in different language:	Turbine-generator;torsional vibration;incremental encoder;error analysis
Abstract in different language:	Turbine-generator torsional vibration is linked to electrical events in the power grid by the generator air-gap torque. Modern power systems are subject to gradual transformation by increasing flexibility demands and incorporation of renewable resources. As a result, electrical transient events are getting more frequent and thus torsional vibration is getting more and more attention. Especially in the case of large steam and gas turbines torsional vibration can cause material fatigue and present a hazard for safe machine operation. This paper freely builds on previous work, where a method for torsional vibration evaluation using an incremental encoder measurement was presented, in that it supplements error considerations to this methodology. Measurement errors such as precision of the rotor encoder manufacturing, choice of the proper sensor, its signal to noise ratio and the error of instantaneous velocity computation algorithm are analyzed. The knowledge of these errors is essential right for torsional vibration as there is an indirect and relatively complicated path from the measurement to the final torsional vibration results compared to other kinds of vibration. The characteristics of particular errors of the processing chain are validated both on experimental data from a test rig as well as field data measured on turbine-generators in power plants.
Rights:	Plný text je přístupný v rámci univerzity přihlášeným uživatelům. © American Society of Mechanical Engineers
Appears in Collections:	Konferenční příspěvky / Conference papers (NTIS) Konferenční příspěvky / Conference Papers (KKY) OBD

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