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