江苏春晨电缆有限公司 已通过实名认证

江苏春晨电缆有限公司生产JFEYH高压电机引接线，我公司生产橡套软电缆，异物造成的相间短路

Interphase short circuit caused by foreign objects

3.2 外力破坏，用户端因各类故障造成的相间短路

3.2 external force failure, interphase short circuit due to various faults.

3.3 鸟害造成的相间短路

Interphase short circuit caused by 3.3 bird damage

3.4 雷击造成的相间短路

Interphase short circuit caused by 3.4 lightning strike

间歇性故障主要是指配电线路在运行过程中会出现间歇性放电的现象，在放电时会产生弧光，这种间歇性故障具有一定的瞬时性与重复性的特点，每次故障的发生时间间隔都会逐渐延长，每次从几秒至几分，再到几小时、几天不断变化，因此没有规律可循。JFEYH高压电机引接线

Intermittent fault mainly refers to the phenomenon of intermittent discharge in the operation process of distribution lines. Arc light will be produced during discharge. This intermittent fault has a certain characteristic of instantaneous and repeatability. The interval of each fault will gradually extend, from several seconds to several minutes each time, then to several hours and days. Constantly changing, so there is no law to follow.

配电线路的间歇性故障发生时，线路检修人员要及时对故障原因进行排查，明确故障产生的原因后，对故障采用针对性的措施进行维修。电力企业的维修人员如果不能及时发现故障，就不能在**时间做好对线路的维修工作，会导致线路的连锁反应。

When the intermittent fault occurs in the distribution line, the line maintenance personnel should check the cause of the fault in time. After the cause of the failure is clearly defined, the maintenance of the fault is taken with the pertinent measures. If the maintenance personnel of power enterprises fail to find faults in time, they can not do the maintenance work well at the first time, which will lead to the chain reaction of the lines.

二、配电线路在线故障诊断

Two, on-line fault diagnosis of distribution line

1、 主动定位法

1. Active location method

对配电线路的故障诊断方法主要有三种：JFEYH高压电机引接线

There are mainly three kinds of fault diagnosis methods for distribution lines.

①S注入法。这种方法的主要特点是采用发射信号的方式，追中配电线路中的故障点，并进行定位，这种方式能够对故障进行**查找。

(1) S injection. The main feature of this method is to adopt the mode of transmitting signal, to catch up the fault points in the distribution line, and to locate the fault. This method can find out the fault accurately.

②中性点脉宽注入法。由于S注入法对配电线路的在线定位无法有效发挥作用。因此可以采用中性点脉宽注入法，这种方法检测电路故障并没有明显的缺点与不足之处，受环境等限制因素的影响也较小，因此具有较高的安全性与准确性，能够有提高对故障的检测效率。

(2) neutral point pulse width injection. The S injection method can not play an effective role in the on-line location of distribution lines. Therefore, the neutral point pulse width injection method can be used. This method can detect the fault of the circuit without obvious shortcomings and shortcomings, and is less affected by the environment and other restrictions. Therefore, it has high security and accuracy, and can improve the detection efficiency of the fault.

③交直流综合注入法。交直流综合注入法与之前的检测手段相比，缺陷较多。当线路发生故障时，交直流综合输入法检测需要承担的风险较大，这种检测方法需要的时间较长，与前两种检测方法相比较而言，效率更低，同时耗费了较多的人力、物力，确定故障位置所需的时间也较长。

(3) AC and DC integrated injection method. Compared with the previous detection methods, the AC / DC integrated injection method has many defects. When the line breaks down, the risk of the AC and DC integrated input method is larger. This detection method needs a long time. Compared with the previous two methods, the efficiency is lower, and more manpower and material resources are consumed, and the time required to determine the fault location is long.

2、 被动定位法

2. Passive location method

被动定位法主要采用的是区段查找、阻抗法等方式实现对电力系统中的配电线路故障进行查找。

The passive location method mainly adopts the method of section finding and impedance method to find out the faults of distribution lines in power system.

①区段查找法。通过配电网中的自动化设备对配电线路各个区段进行被动式定位，这样可以清晰明了地查找出配电故障发生的区段。配电网的自动化设备能够通过运行数据分析，对线路故障发生的区段进行分析研究，以缩小故障点存在的范围，**锁定故障位置，能够在很大程度上缩短查找故障所需要的时间，效率较高。

(1) section search method. Through the automatic equipment in the distribution network, the various sections of the distribution line are fixed in passive location, so that the section of the distribution fault can be found out clearly and clearly. The automation equipment of the distribution network can analyze the section of the fault of the line through the analysis of the operation data, in order to narrow the range of the fault point and finally lock the fault location, which can greatly shorten the time needed to find the fault, and the efficiency is high.