According to the actual situation of power supply network and protection system under mine, a long distance faults online monitoring program is presented for overcoming the short protection distance.

本文结合矿用供电网的实际情况和保护系统的现状，针对现有技术保护距离较短的缺点，提出了一种针对矿用供电线路的远距离故障在线监测的方案。

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The system supplies effective technical means for the scientific management of relay protection operation and better service for the reliable operation of power network.

该系统为继电保护运行的科学化管理提供了有效的技术手段，将更好地为电网的安全可靠运行服务。

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With the improvement of Marine power supply network and high requirement of the selective protection, longitudinal differential protection has more practical meaning in Marine power system.

随着船舶供电网络结构复杂程度和选择性保护要求的提高，将纵差动保护应用于船舶电力系统有着越来越大的实际意义。

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