Open AccessDisturbance propagation mechanism based on the electromechanical wave theory
Author(s) -
Bi Tianshu,
Qin Junda,
Yan Yuehao,
Liu Hao,
Martin Kennth E.
Publication year - 2016
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2015.1268
Subject(s) - disturbance (geology) , control theory (sociology) , inertia , transfer function , electric power system , interconnection , amplitude , oscillation (cell signaling) , power (physics) , controller (irrigation) , computer science , engineering , telecommunications , physics , electrical engineering , control (management) , paleontology , quantum mechanics , artificial intelligence , agronomy , genetics , classical mechanics , biology
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.