Application Of Linear Analysis In Traction Power
System Stability Studies
Author(s)
S. Danielsen, T. Toftevaag & O. B. Fosso
Abstract
Dynamical phenomena such as oscillations and instability in railway power
systems have caused concern in the experts’ community the recent years. On
several occasions, modern advanced electrical rail vehicles have been the source
of low frequency power oscillations leading to an unstable power system due to
lack of damping, and as a consequence operational problems. A method to study
these phenomena is needed. Well known linear techniques based on small-signal
analysis provide valuable information about the inherent characteristics of even
non-linear single-phase power systems. This paper describes how a traction
power system and its dynamical railway-related components are modelled in a
commercially available power system analysis software and studied by linear
analysis such as eigenvalues, participation factors and parameter sensitivities.
This is used to gain knowledge about the interaction between the rail vehicles
and the electrical infrastructure. Linear analysis is found to be a powerful tool in
this respect provided that adequate models of the relevant components can be
established in RMS mode. The results clearly indicate poor interaction.
Keywords: AC railway power supply, traction power system, stability, advanced
electrical rail vehicle, rotary converter, low frequency oscillations, eigenvalue
analysis.
1 Introduction
The recent development of electrical rail vehicles with utilization of power
electronics and complex control systems has introduced new phenomena of
dynamical interaction between electrical rail vehicles and railway power supply.
One such phenomenon is low frequency power oscillations leading to system
Keywords
AC railway power supply, traction power system, stability, advanced
electrical rail vehicle, rotary converter, low frequency oscillations, eigenvalue
analysis.
Related Book
Other papers in this volume
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