随后计算出代表故障特征的振动信号的峰值指标、峭度指标、脉冲指标和裕度指标等参数。

Then peak index, kurtosis index, impulsion index and tolerance index of the vibration signal are calculated. These parameters represent the characteristic of failures.

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该方法有效地拉大了故障馈线与非故障馈线故障判断量的差距，极大地提高了保护裕度。

This method increased effectively the difference of the fault judging quantity in fault feeder and non-fault feeder, and the protecting abundant degree has been also greatly enhanced.

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