A Strategy for Oscillation Source Location Using Closed-Contour Grouping and Energy-Flow Spectra

Singh, Iknoor; Chiluka, Vikram Kumar Reddy; Trudnowski, Daniel; Donnelly, Matt

doi:10.1109/td39804.2020.9299927

Cited by 7 publications

(4 citation statements)

References 5 publications

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“…We are talking primarily about dynamic tension caused by deformations due to various external factors. Suppose the dynamic deformations under continuous action on such elements for the case of simple stress state (torsion, tension, pure bending) obtained based on the mathematical models (torsional, longitudinal, bending) of oscillations [1][2][3][4][5][6][7] for quasilinear [8] linear or partial strongly nonlinear [9][10][11] laws of flexibility, for discrete action. In that case, the question for many cases remains open.…”

Section: Introductionmentioning

confidence: 99%

“…The problem is related to constructing analytical solutions to the corresponding boundary (mixed) problems for nonautonomous linear (quasilinear) equations of hyperbolic type. Numerical simulations of these mathematical models [2,4,8] cannot provide generalized answers to many practical problems related to the discrete action of external load. First of all, these are the resonance conditions and peculiarities of its passage under the periodic impulse of external perturbation.…”

Section: Introductionmentioning

confidence: 99%

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Impulse Moments Influence on Single-Frequency Torsional Oscillations of Nonlinear Flexible Bodies

et al. 2022

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A method of analytical study of the influence of impulse moments on nonlinear torsional oscillations of a homogeneous constant cross-section of a body under classical boundary conditions of the first, second, and third types have been developed. When the flexible material properties meet the body close to the power law of flexibility, mathematical models of the process have been obtained. They are the boundary value problems for an equation of hyperbolic type with a small parameter at the discrete righthand side. The latter expresses the effect of pulse momentum on the oscillatory process. Under the effect of periodic pulse momentum on a flexible body, resonant and non-resonant processes are possible, and resonant processes occur when the amplitude of natural oscillations approaches a fixed value. The peculiarities of resonant oscillations are established. Relative torsional oscillations of a nonlinear flexible body that rotates around the axis with a constant portable angular velocity are considered, taking into account the periodic action of pulse momentum acting in a fixed cross-section. It is shown that: the amplitude of passing through the main resonance is more significant for larger values of the nonlinearity parameter; the case of the action of pulse momentum closer to the middle of the body. If the initial perturbation amplitude is less than the amplitude at which the resonance occurs in the presence of only internal forces of viscous friction, the external periodic impulse moments of resonance processes have occurred. The reliability of the calculation formulas is confirmed by the fact that in the extreme case known from the literature, resources are obtained related to the dynamics of the respective objects under the continuous action of autonomous perturbation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impulse Moments Influence on Single-Frequency Torsional Oscillations of Nonlinear Flexible Bodies

et al. 2022

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“…Localising the source is therefore an important task. Several methods for localising the source of forced oscillations based on energy methods have been proposed [2]- [7].…”

Section: Introductionmentioning

confidence: 99%

Data-based model validation for locating the source of forced oscillations due to power plant governors

Bombois¹,

Jakobsen

Arco³

2022

2022 International Conference on Smart Energy Systems and Technologies (SEST)

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“…Oscillation source localization can be achieved based on the trend of the branch potential energy time series trajectory. The potential energy of the branch near the center of oscillation will change substantially [26].…”

mentioning

confidence: 99%

An Intelligent Location Method for Power System Oscillation Sources Based on a Digital Twin

Yang,

Wang,

Gao

et al. 2023

Electronics

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Aiming at the difficult problem of broadband oscillation localization in power systems, the intelligent localization method of an oscillation source based on a digital twin is proposed, and the oscillation source localization system is thus constructed. Firstly, a digital twin-based oscillation source localization method and its system architecture are proposed. Furthermore, an intelligent positioning method of the oscillation source, based on data-driven and mechanism fusion, is proposed. It includes three steps: oscillation signal preprocessing, oscillation modal analysis and oscillation source localization. For the oscillation signal preprocessing, the generative adversarial imputation network is used to repair the missing samples, and the super-resolution technique is used to realize the super-resolution measurement of broadband oscillation. In the oscillation modal analysis, the spectrum of the oscillation signal is extracted using the fast Fourier transform. To accurately locate the oscillation source, branch potential energy is used as the input to the data-driven model, such as LSTM and CNN. Finally, an oscillation source localization system is developed based on the digital twin workshop CloudPSS-XStudio, which can locate the oscillation source quickly and accurately.

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A Strategy for Oscillation Source Location Using Closed-Contour Grouping and Energy-Flow Spectra

Cited by 7 publications

References 5 publications

Impulse Moments Influence on Single-Frequency Torsional Oscillations of Nonlinear Flexible Bodies

Impulse Moments Influence on Single-Frequency Torsional Oscillations of Nonlinear Flexible Bodies

Data-based model validation for locating the source of forced oscillations due to power plant governors

An Intelligent Location Method for Power System Oscillation Sources Based on a Digital Twin

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