1. Ferroresonance of Power Transformers Considering Non-linear Core Losses and Metal Oxide Surge Arrester Effects.
- Author
-
Radmanesh, Hamid, Gharehpetian, G. B., and Fathi, Hamid
- Subjects
- *
ELECTRIC losses in electric transformers , *METALLIC oxides , *NONLINEAR theories , *RESONANCE , *MAGNETIZATION , *BIFURCATION theory , *TIME-domain analysis , *CHAOS theory - Abstract
In this article, a simple case of ferroresonance in a three-phase transformer is used to study the effect of a metal oxide surge arrester on the control of chaotic ferroresonance and duration of chaotic transient in a power transformer including non-linear core losses. The time-domain simulations are derived using MATLAB (The MathWorks, Natick, Massachusetts, USA) for a three-phase 50-MVA, 635.1-kV power transformers while one of its phases is opened. The magnetization characteristic of the power transformer is modeled by a single-value two-term polynomial. The non-linear core losses are modeled by a third-order power series in terms of voltage, and the core losses non-linearities are considered as well. The simulation results show that connecting the metal oxide surge arrester to the transformer exhibits a great suppressing effect on occurred ferroresonance over-voltage. [ABSTRACT FROM PUBLISHER]
- Published
- 2012
- Full Text
- View/download PDF