中文摘要：

为了减小舰船电力系统发生单相接地故障的危害,提出一种利用数学形态学中的梯度变换和闭运算变换级联的方式识别接地故障类型的方法。该方法能识别出金属性接地和间歇性接地发生时的不同。通过大量仿真验证了该方法,不同条件下其均能良好的识别故障。

英文摘要：

In order to reduce the harm to ship＇s power system single-phase ground fault, a method is proposed by using the gradient transform in mathematical morphology and closing operation transform cascaded mode grounding fault type identification. The method can identify the metal grounding and intermittent grounding occurred in differentl Simula-t-ions show that the method can identify the faults under different conditions.