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Advances in Power Electronics
Volume 2012 (2012), Article ID 529178, 6 pages
http://dx.doi.org/10.1155/2012/529178
Research Article

Resistive Ferroresonance Limiter for Potential Transformers

1Department of Electrical Engineering, Islamic Azad University, Takestan Branch, Takestan 1995755681, Iran
2Electrical Engineering Department, Amirkabir University of Technology, Tehran, Iran

Received 10 July 2012; Revised 4 October 2012; Accepted 12 October 2012

Academic Editor: Hadi Y. Kanaan

Copyright © 2012 Hamid Radmanesh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The ferroresonance or nonlinear resonance is a complex phenomenon, which may cause overvoltage in the electrical power system and endangers the system reliability and operation. The ability to predict the ferroresonance in the transformer depends on the accuracy of the transformer model used. In this paper, the effect of the new suggested ferroresonance limiter on the control of the chaotic ferroresonance and duration of chaotic transients in a potential transformer including nonlinear core losses is studied. To study the proposed ferroresonance limiter, a single phase 100 VA, 275 kV potential transformer is simulated. The magnetization characteristic of the potential transformer is modeled by a single-value two-term polynomial. The core losses are modeled by third order power series in terms of voltage and include core nonlinearities. The simulation results show that the ferroresonance limiter has a considerable effect on the ferroresonance overvoltage.