saber仿真

1. Three-phase rectifier transformer modelling

1. 1. Introduction

This grid-frequency （50 Hz）， high-power， rectifier transformer model provides the means to simulate accurately the magnetising steady state currents， the inrush currents （transformer tum-on phase） and the short-circuit impedance （ex）in a bridge circuit configuration.

Based on the geometrical description of the transfonner （Figure 1） and the properties of the magnetic core cores represent the different flux paths between the windings and the limbs. tt， -》 1） is simulated with additional air cores in parallel with the cores of the magnetic material （Figure 2）。 These air introduced or represent imperfection in the joints. The flux leakage during the saturation of the magnetic material （when added to take into account the air gaps between the limbs and the yokes （Figure 1）。 Such air gaps are either deliberately ［4］。 Each magnetic element of the transformer is described with an associated magnetic core. Air cores in series may be material （manufacturer’s data sheets）， an equivalent model is built for the SABER software （Figure 2） based on reference B