A loop cancellation based active damping solution for constant power instability in vehicular power systems

Zhang, X.N., Vilathgamuwa, D.M., Bhangu, B.S., Chandana, G., & Tseng, K.J. (2012) A loop cancellation based active damping solution for constant power instability in vehicular power systems. In Proceedings of the 2012 IEEE Energy Conversion Congress and Exposition (ECCE), IEEE, Raleigh, NC, The United States of America, pp. 1182-1187.

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In recent years, electric propulsion systems have increasingly been used in land, sea and air vehicles. The vehicular power systems are usually loaded with tightly regulated power electronic converters which tend to draw constant power. Since the constant power loads (CPLs) impose negative incremental resistance characteristics on the feeder system, they pose a potential threat to the stability of vehicular power systems. This effect becomes more significant in the presence of distribution lines between source and load in large vehicular power systems such as electric ships and more electric aircrafts. System transients such as sudden drop of converter side loads or increase of constant power requirement can cause complete system instability. Most of the existing research work focuses on the modeling and stabilization of DC vehicular power systems with CPLs. Only a few solutions are proposed to stabilize AC vehicular power systems with non-negligible distribution lines and CPLs. Therefore, this paper proposes a novel loop cancellation technique to eliminate constant power instability in AC vehicular power systems with a theoretically unbounded system stability region. Analysis is carried out on system stability with the proposed method and simulation results are presented to validate its effectiveness.

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ID Code: 74854
Item Type: Conference Paper
Refereed: Yes
Keywords: Electric propulsion, Electric vehicles, Active damping, Constant power instability, Loop cancellation, Vehicular power systems
DOI: 10.1109/ECCE.2012.6342683
ISBN: 9781467308014
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 IEEE
Deposited On: 11 Aug 2014 00:41
Last Modified: 11 Aug 2014 23:25

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