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发明公开
CN107085168A 一种含有多回电缆出线的单相接地故障选线装置 无效 - 驳回

一种含有多回电缆出线的单相接地故障选线装置
摘要：
本发明公开一种含有多回电缆出线的单相接地故障选线装置，采集母线上的零模电压初始行波与该母线所联的所有出线中的每回出线上的零模初始电流行波的第一采集单元；提取零模电流初始行波的极性和按照零模电流初始行波极性将所有出线分组的第一确定单元；提取零模电压初始行波的极性，并选出零模电流初始行波极性与零模电压初始行波极性相反的出线，再结合现场的出线实际，选出发生单相接地故障的母线或者线路的第二确定单元；通过本发明的技术方案，可以准确地选择出发生单相接地故障的线路。
摘要（英）：

The invention discloses a single-phase earth fault line selection device having multi-circuit cable outgoing lines. The device comprises a first acquisition unit which acquires zero mode voltage initial traveling waves on a bus and zero mode initial current traveling waves on each circuit of outgoing line of all the outgoing lines connected with the bus; a first determination unit which extracts the polarity of the zero mode current initial traveling waves and groups all the outgoing lines according to the polarity of the zero mode current initial traveling waves; and a second determination unit which extracts the polarity of the zero mode voltage initial traveling waves and selects the outgoing lines of which the polarity of the zero mode current initial traveling waves and the polarity of the zero mode voltage initial traveling waves are opposite and then selects the bus or the line having the single-phase earth fault through combination of the actual field outgoing lines. With application of the technical scheme, the line having the single-phase earth fault can be accurately selected.

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