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Invention Publication
CN107636921A 用于在混合配置输电线路中检测故障的方法和设备 有权 转让

用于在混合配置输电线路中检测故障的方法和设备
Abstract:
公开了一种用于在混合配置输电线路(10)中故障检测的方法和设备，该输电线路(10)包括多个部分(11，12，13)，该多个部分(11，12，13)被布置在该输电线路(10)的一端(S1)与该输电线路(10)的另一端(S2)之间，并且包括至少一个架空线部分(11，13)以及至少一个电缆部分(12)。基于将在该输电线路的一端(S1)和另一端(S2)处的行波电压或者电流时间导数与选定的阈值进行的比较，确定在该输电线路(10)的至少一个电缆部分(12)中是否有故障发生。本发明的实施例利用在电缆部分(12)与相邻架空线部分(11，13)之间的结点(14，15)处可能发生的行波电压和/或电流的放大来确定在该输电线路(10)的电缆部分(12)中是否有故障发生。
Abstract(English):

A method and an apparatus for fault detection in a mixed configuration power transmission line (10) comprising a plurality of sections (11, 12, 13) arranged between one end (S1) of the transmission line (10) and the other end (S2) of the transmission line (10) and comprising at least one overhead line section (11, 13) and at least one cable section (12) are disclosed. Based on a comparison travelling wave voltage or current time derivatives at the one end (S1) and the other end (S2) of the power transmission line (10) with selected threshold values, it is determined if there is a fault occurring in at least one cable section (12) of the power transmission line (10). Embodiments of the present invention utilize amplification of travelling wave voltages and/or currents which may occur at junctions (14, 15) between a cable section (12) and an adjacent overhead line section (11, 13) in determining if the fault occurs in a cable section (12) of the power transmission line (10).

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