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Common faults in distribution lines

1、 高阻故障

1, high resistance fault

导致高阻故障的原因主要可以分为两种，一种是在运行过程中，配电线路发生断裂等情况，与高阻抗发生接触;第二种情况是正常运作的配电线路发生断裂，碰到了线路周围的物体，这两类情况都会导致配电线路高阻故障的发生。

The cause of high resistance fault can be divided into two kinds, one is in the course of operation, the distribution line is broken and the other is in contact with the high impedance. The second condition is that the normal operation distribution line breaks and meets the objects around the line. These two kinds of situation will cause the occurrence of the high resistance fault of the distribution line. .

配电线路主要是安装在室外，受环境因素的影响较大，首先是输电线路自身的问题，输电线路使用时间过长就会出现不同程度的老化现象，导致线路断裂，发生故障;其次是外部环境问题，其次是外力作用因素，受到人为因素的影响，如故意损坏线路、外力撞击等导致线路故障。

The distribution line is mainly installed in the outdoor, influenced by the environmental factors, first is the problem of the transmission line itself. The long use time of the transmission line will appear to varying degrees of aging, causing the line breaking and failure; secondly, the external environment problems, the second force factors, and human factors. The influence, such as intentionally damaging the line, external force impact, and so on, leads to line failure.

当高阻故障发生，电流水平明显低于由于短路而产生的电流水平，这就为配电线路的在线故障识别带来了一定的影响，在传统的电流保护中对这类故障的检出率较低，因此无法及时进行调整，从而引起配电系统中更加严重的故障，发生线路短路，引起火灾等太阳能电缆

When the high resistance fault occurs, the current level is obviously lower than the current level caused by the short circuit, which has brought a certain influence on the on-line fault identification of the distribution lines. In the traditional current protection, the detection rate of this kind of fault is low, so it can not be adjusted in time, which causes the more serious cause of the distribution system. A barrier, a short circuit of a line, a fire, etc