Disturbance propagation mechanism based on the electromechanical wave theory

With the development of power grid interconnection, the disturbances propagation behave as a sort of electromechanical waves. The study of the disturbance propagation mechanism in the interconnected power networks is of great importance for controlling the spreading of disturbance and improving the...

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Bibliographic Details
Published in:IET generation, transmission & distribution transmission & distribution, 2016-09, Vol.10 (12), p.2891-2898
Main Authors: Bi, Tianshu, Qin, Junda, Yan, Yuehao, Liu, Hao, Martin, Kennth E
Format: Article
Language:English
Subjects:
50‐generator chain network
amplitude variations
Corners
discrete inertia model
disturbance control
disturbance propagation mechanism
Disturbances
electromagnetic wave propagation
electromechanical wave equation
electromechanical wave theory
frequency dispersion
frequency disturbances
Inertia
interconnected power networks
local oscillation
Mathematical models
Networks
phase variations
power grid interconnection
power grids
power system interconnection
power system security
power system security level improvement
Propagation
propagation characteristics
transfer functions
Wave equations
wave functions
Wave propagation
wave transfer function
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Summary:With the development of power grid interconnection, the disturbances propagation behave as a sort of electromechanical waves. The study of the disturbance propagation mechanism in the interconnected power networks is of great importance for controlling the spreading of disturbance and improving the security level of power systems. In this study, the electromechanical wave equation is built based on the discrete inertia model of power networks. In order to describe the phase and amplitude variations, the wave transfer function is derived. Then, the propagation characteristics of different frequency disturbances are analysed. The corner frequency of the discrete inertia model is proposed. Furthermore, the frequency dispersion and local oscillation are revealed as well as their relationships with corner frequency. Computer simulations for a 50-generator chain network are used to verify the propagation characteristics of disturbances with different frequencies. The research work is beneficial to analyse the influence of disturbance and develop countermeasures for disturbance based on electromechanical wave theory.
ISSN:1751-8687
1751-8695
1751-8695
DOI:10.1049/iet-gtd.2015.1268