engleski

IMPACT OF GEOMAGNETICALLY INDUCED CURRENTS ON MAGNETIZING CURRENTS UNDER NO-LOAD CONDITIONS

Different approaches can be used to calculate the magnetizing current waveforms in no-load conditions with or without DC bias currents flowing through the windings. One is to utilize the finite element method (FEM) as described in [3]. However, this requires a great deal of computing power and, naturally, is highly time consuming. The other is solving a magnetic reluctance network. The primary objective of this paper is to compare the results of the solution to simple network of nonlinear magnetic reluctances combined with an optimization method, and the FEM analysis results on the simplified power transformer geometry. Optimization process is necessary to obtain the steady - state waveform to the magnetizing current in no-load conditions.

Power transformer; Magnetizing current; GIC; FEM; Reluctance network

nije evidentirano