一起变压器异常接地的过渡过程分析

Analysis on the Abnormal Grounding Transitional Procession of Transformer

通过一起变压器低压端异常接地实例 ,对其过渡过程进行了分析探讨 ,从而排除了变压器产生危险过电压进而损坏绝缘的可能性 ,但绕组中的电流在暂态过程中会发生零位偏移 ,将导致铁心柱中磁通饱和 。

According to an abnormal grounding fault occurring at the low-voltage side of one transformer, this paper analyses the transitional process and removes the feasibility that transformer insulation is damaged by dangerous overvoltage. And it concludes that when zero point excursion of current passing the coils appears, the saturation of magnetic flux in cores will lead to the current distortion and the temperature rise of transformer.