Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/26606
Title: Connection between Damping Torque Analysis and Energy Flow Analysis in Damping Performance Evaluation for Electromechanical Oscillations in Power Systems
Authors: Hu, Y
Bu, S
Zhang, X
Chung, CY
Cai, H
Keywords: electromechanical oscillation;damping performance;damping torque analysis (DTA);energy flow analysis (EFA);frequency spectrum
Issue Date: 17-Feb-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE) on behalf of SGEPRI
Citation: Hu, Y. et al. (2022) 'Connection between Damping Torque Analysis and Energy Flow Analysis in Damping Performance Evaluation for Electromechanical Oscillations in Power Systems', Journal of Modern Power Systems and Clean Energy, 10 (1), pp. 19 - 28. doi: 10.35833/MPCE.2020.000413.
Abstract: © Copyright 2021 The Author(s). The damping performance evaluation for electro-mechanical oscillations in power systems is crucial for the stable operation of modern power systems. In this paper, the connection between two commonly-used damping performance evaluation methods, i.e., the damping torque analysis (DTA) and energy flow analysis (EFA), are systematically examined and revealed for the better understanding of the oscillatory damping mechanism. First, a concept of the aggregated damping torque coefficient is proposed and derived based on DTA of multi-machine power systems, which can characterize the integration effect of the damping contribution from the whole power system. Then, the pre-processing of measurements at the terminal of a local generator is conducted for EFA, and a concept of the frequency-decomposed energy attenuation coefficient is defined to screen the damping contribution with respect to the interested frequency. On this basis, the frequency spectrum analysis of the energy attenuation coefficient is employed to rigorously prove that the results of DTA and EFA are essentially equivalent, which is valid for arbitrary types of synchronous generator models in multi-machine power systems. Additionally, the consistency between the aggregated damping torque coefficient and frequency-decomposed energy attenuation coefficient is further verified by the numerical calculation in case studies. The relationship between the proposed coefficients and the eigenvalue (or damping ratio) is finally revealed, which consolidates the application of the proposed concepts in the damping performance evaluation.
URI: https://bura.brunel.ac.uk/handle/2438/26606
DOI: https://doi.org/10.35833/MPCE.2020.000413
ISSN: 2196-5625
Other Identifiers: ORCID iD: Xin Zhang https://orcid.org/0000-0002-6063-959X
Appears in Collections:Dept of Electronic and Electrical Engineering Research Papers

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