Inrush current limiter based on three-phase diode bridge for Y-yg transformers

In this study, a simple, but effective method is presented for the limitation of the Y-yg transformers inrush current. One of the main privileges of this method is its simple topology. It does not need any control circuit or measurement unit. The method is based on a three-phase diode bridge with a low resistance DC reactor. Since the number of diodes is minimised, the voltage ripple, electrical losses and the malfunction probability owing to device failure are decreased considerably. The proposed method is simulated and validated by experimental test results. It is shown that the proposed configuration is effective for the inrush current limitation of Y-yg transformers.