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Low Frequency Stability of AC Railway Traction Power Systems: Analysis of the Influence of Traction Unit Parameters
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Low Frequency Stability of AC Railway Traction Power Systems: Analysis of the Influence of Traction Unit Parameters
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Journal Article
Low Frequency Stability of AC Railway Traction Power Systems: Analysis of the Influence of Traction Unit Parameters
2022
Overview
Dynamic interactions between AC railway electrification systems and traction unit power converters can result in low frequency oscillation (LFO) of the contact-line voltage amplitude, which can lead to a power outage of the traction substation and the shutdown of train traffic. Several system parameters can influence the low frequency stability of the railway traction power system, including contact-line length and traction unit parameters such as transformer leakage inductance, DC-link capacitance, control bandwidths and synchronization systems. This paper focuses on the influence of these parameters on the LFO. The methodology is based on a frequency-domain analysis. Nyquist and Bode diagrams are used to determine the stability limit. The validation of the method is performed through the use of time-domain simulations.
Publisher
MDPI AG,MDPI
Subject
/ Traction
