在小电流接地系统中，发生单相接地故障的概率很高，因而，准确的选出故障线路，对于提高运行可靠性，具有重要的意义。
Single phase earthed fault is the common fault in this system. To select the fault line accurately is of great importance to improve the operation reliability.
直流输电线路距离往往上千公里，线路越长、发生故障的概率越高，同时查找故障点的难度也越大。
The longer the lines are, the greater probability of line fault is, and the more difficult it will be to find the fault location.
本文所提出的自适应重合闸方案在最大程度上保证了线路不重合于永久性故障，并且增加了重合闸成功的概率。
The adaptive auto-reclosing scheme can avoid reclosing the fault lines to permanent fault nearby, and enhance the possibility of reclosing successful.
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