Experimental Investigations on Turbine-Generator Shaft Under Subsynchronous Resonance
Damper; Finite element method; Modal analysis; Rotor dynamics; Subsynchronous resonance; Turbo-generator shaft
Energy exchange takes place between turbine and generator in the power system during subsynchronous resonance (SSR) which leads to torsional interaction between the shafts. Resonance in the power system is caused by the series capacitors connected to the transmission line. This paper aims to present an electromechanical approach to analyse and interpret subsynchronous resonance using the Finite element method. Subsynchronous resonance is introduced in two test rigs consisting of turbine, generator, shaft, and coupler with capacitors. Experiments and simulations (torque analysis and frequency response analysis) are conducted in test rigs and ANSYS workbench 16.0. Moreover, a spring damper is modelled to improve the stability of the shaft. From the results, it is clear that mechanical stress is increased when capacitors are connected to the test rig. A spring damper is installed at the point where the deformation is high. The damper reduced the stress and the vibration. 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Manikandan P.; Sushanth G.; Haneesh K.M.
Lecture Notes in Electrical Engineering, Vol-977, pp. 693-703.
Springer Science and Business Media Deutschland GmbH
Manikandan P., Department of EEE, CHRIST (Deemed to be University), Bengaluru, India; Sushanth G., Department of ECE, CHRIST (Deemed to be University), Bengaluru, India; Haneesh K.M., Department of EEE, CHRIST (Deemed to be University), Bengaluru, India