Abstract
Purpose In this paper, an electromechanical approach to study the turbine–generator shaft stability with and without dampers is made. The shaft is subjected to electrical disturbances created by series capacitors. The high power capacitors help the electric power system to improve the reactive power in high voltage transmission lines. Methods Finite element method is used to study the stability of the shaft under subsynchronous resonance when compared to the traditional methods like eigenvalue analysis, frequency scanning method and digital time simulation techniques. At the same time, it leads to subsynchronous resonance. Results Electromechanical stress in the rotating shaft arises when the resonance is created in the system. Maximum stress and strain of the shaft are calculated with other necessary parameters to prove the system instability. In order to maintain stability, dampers are installed at an optimum location. Conclusion Best location of installing damper is found using ANSYS 16.0 by modal analysis, harmonic and phase response analysis. The damper installed at the point reduces the stress caused by subsynchronous resonance and maintains the stability of the system.
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References
Xie X, Zhang C, Liu H, Liu C, Jiang D, Zhou B (2016) Continuous mass model based mechanical and electrical co-simulation of SSR and its application to a practical shaft failure event. IEEE Trans Power Syst 31(6):5172–5180
Saxena Ankur, Pareya Anand, Chouksey Manoj (2016) Study of modal characteristics of a geared rotor system. Procedia Technol 23:225–231
Kirchg B (2016) Finite elements in rotor dynamics. Procedia Eng 144:736–750
Mankowski O, Wang Q (2013) Real-time monitoring of wind turbine generator shaft alignment using laser measurement. Procedia CIRP 11(1):291–295
Bai B, Zhang LX, Guo T, Liu CQ (2012) Analysis of dynamic characteristics of the main shaft system in a hydro-trubine based on ANSYS. Int Conf Adv Comput Model Simul 31:654–658
Elhefny A, Guozhu L (2012) Stress analysis of rotating disc with non-uniform thickness using finite element modeling. In: Proceeding of the International Conference on Engineering and Technology (ICET). Cairo, pp 1–5
Karlberg (2010) Approximated stiffness coefficients in rotor systems supported by bearings with clearance. Int J Rotating Mach
Hernandez M, Guardado JL, Venegas V, Melgoza E, Rodriguez L (2008) Analysis of the torsional modes of the turbine-synchronous generator group. In: IEEE/PES transmission and distribution conference and exposition. Bogota, Latin America, pp 1–7
Tsai J (2007) A new damper scheme to restrict torsional torques on the turbine generator shafts and blades near a HVDC link. Electr Eng 89:377–387
Tsai JI, Lin CH, Tsao TP (2003) Long-term fatigue life loss of turbine blades owing to non-characteristic harmonic currents in asynchronous HVDC links. J Electr Power Syst Res 65(2):135–147
Liang CC (1993) Torsional response of rotor system in steam turbine-generator. Taipower Eng J 538(6):35–52
IEEE Sub Synchronous Resonance Working Group (1992) Readers guide to sub synchronous resonance oscillations. IEEE Trans Power Apparatus Syst 7:150–157
Silva RT, Ritto TG (2018) Impact of damper seal coefficients in rotor dynamics. In: Proceedings of the joint ICVRAM ISUMA UNCERTAINTIES conference. Brazil, April 2018
Leader ME Evaluating and correcting subsynchronous vibration in vertical pumps. In: Dyrobes rotor dynamics software
Yang P, Yuan Q, Huang C (2017) Analysis of the impacts of bearing on vibration characteristics of rotor. Shock Vibr 22(4)
IEEE Sub Synchronous Resonance Working Group (1985) Second benchmark model for computer simulation of sub synchronous resonance. IEEE Trans Power Apparatus Syst PAS 104(5):1057–1066
IEEE Sub synchronous resonance working group, “Terms, definitions and symbols for sub synchronous resonance oscillations” IEEE Transactions on Power Apparatus and Systems, vol. PAS-104, no. 6, 1985, pp. 1326–1334
Lambrecht D, Kulig T (1982) Torsional performance of turbine generator shafts especially under resonant excitation. IEEE Trans Power Apparatus Syst 101:3689–3697
Glienicke J (1967) Experimental investigation of the stiffness and damping coefficients of turbine bearings and their application to instability prediction. Proc IMechE 181(3B):116–129
Assenkamp A, Hoffmann R, Kreische C, Exnowski S (2017) Simulative analyses of dynamical behavior of steam-powered turbo generators during power system incidents with a higher rate of change of frequency. In: IET international conference on resilience of transmission and distribution networks. Birmingham, pp 1–6
Jackson MC (1979) Turbine generator shaft torques and fatigue: part I-simulation methods and fatigue analysis. IEEE Trans Power Apparatus Syst PAS 98(6)
Acknowledgements
The authors are grateful to Department of Electrical and Electronics Engineering & Department of Mechanical engineering, School of engineering and technology, CHRIST (Deemed to be) University for providing the laboratory facilities. The authors acknowledge Department of Electrical and Electronics Engineering, Ghousia College of engineering Ramanagaram (Affiliated to Visvesvaraya Technological University), Karnataka, India.
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Manikandan, P., Khan, F.A. (2021). Rotor Dynamics of Turbine–Generator Shaft with Dampers During Subsynchronous Resonance Generated by Series Capacitors. In: Rao, J.S., Arun Kumar, V., Jana, S. (eds) Proceedings of the 6th National Symposium on Rotor Dynamics. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-5701-9_16
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