Power system stability implications from electromechanical wave propagation

Li, Tianya, Ledwich, Gerard, Mishra, Yateendra, & Chow, Joe (2015) Power system stability implications from electromechanical wave propagation. In 7th Asia-Pacific Power and Energy Engineering Conference (APPEEC 2015), 15-18 November 2015, Brisbane, Qld.

Abstract

Electromechanical wave propagation characterizes the first-swing dynamic response in a spatially delayed manner. This paper investigates the characteristics of this phenomenon in two-dimensional and one-dimensional power systems. In 2-D systems, the wave front expands as a ripple in a pond. In 1-D systems, the wave front is more concentrated, retains most of its magnitude, and travels like a pulse on a string. This large wave front is more impactful upon any weak link and easily causes transient instability in 1-D systems. The initial disturbance injects both high and low frequency components, but the lumped nature of realistic systems only permits the lower frequency components to propagate through. The kinetic energy split at a junction is equal to the generator inertia ratio in each branch in an idealized continuum system. This prediction is approximately valid in a realistic power system. These insights can enhance understanding and control of the traveling waves.

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ID Code: 91601
Item Type: Conference Paper
Refereed: Yes
Keywords: Electromechanical wave propagation, kinetic energy, power system transient stability, Continuum model
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Power and Energy Systems Engineering (excl. Renewable Power) (090607)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 [Please consult the author]
Deposited On: 05 Jan 2016 00:29
Last Modified: 22 Jan 2016 15:17

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