江蘇春晨電纜有限公司生產(chǎn)JFEYH高壓電機(jī)引接線，我公司生產(chǎn)橡套軟電纜，異物造成的相間短路

Interphase short circuit caused by foreign objects

3.2 外力破壞，用戶端因各類故障造成的相間短路

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

3.3 鳥害造成的相間短路

Interphase short circuit caused by 3.3 bird damage

3.4 雷擊造成的相間短路

Interphase short circuit caused by 3.4 lightning strike

間歇性故障主要是指配電線路在運(yùn)行過程中會出現(xiàn)間歇性放電的現(xiàn)象，在放電時會產(chǎn)生弧光，這種間歇性故障具有一定的瞬時性與重復(fù)性的特點(diǎn)，每次故障的發(fā)生時間間隔都會逐漸延長，每次從幾秒至幾分，再到幾小時、幾天不斷變化，因此沒有規(guī)律可循。JFEYH高壓電機(jī)引接線

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.

配電線路的間歇性故障發(fā)生時，線路檢修人員要及時對故障原因進(jìn)行排查，明確故障產(chǎn)生的原因后，對故障采用針對性的措施進(jìn)行維修。電力企業(yè)的維修人員如果不能及時發(fā)現(xiàn)故障，就不能在**時間做好對線路的維修工作，會導(dǎo)致線路的連鎖反應(yīng)。

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、配電線路在線故障診斷

Two, on-line fault diagnosis of distribution line

1、 主動定位法

1. Active location method

對配電線路的故障診斷方法主要有三種：JFEYH高壓電機(jī)引接線

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

①S注入法。這種方法的主要特點(diǎn)是采用發(fā)射信號的方式，追中配電線路中的故障點(diǎn)，并進(jìn)行定位，這種方式能夠?qū)收线M(jìn)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中性點(diǎn)脈寬注入法。由于S注入法對配電線路的在線定位無法有效發(fā)揮作用。因此可以采用中性點(diǎn)脈寬注入法，這種方法檢測電路故障并沒有明顯的缺點(diǎn)與不足之處，受環(huán)境等限制因素的影響也較小，因此具有較高的安全性與準(zhǔn)確性，能夠有提高對故障的檢測效率。

(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交直流綜合注入法。交直流綜合注入法與之前的檢測手段相比，缺陷較多。當(dāng)線路發(fā)生故障時，交直流綜合輸入法檢測需要承擔(dān)的風(fēng)險較大，這種檢測方法需要的時間較長，與前兩種檢測方法相比較而言，效率更低，同時耗費(fèi)了較多的人力、物力，確定故障位置所需的時間也較長。

(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、 被動定位法

2. Passive location method

被動定位法主要采用的是區(qū)段查找、阻抗法等方式實(shí)現(xiàn)對電力系統(tǒng)中的配電線路故障進(jìn)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區(qū)段查找法。通過配電網(wǎng)中的自動化設(shè)備對配電線路各個區(qū)段進(jìn)行被動式定位，這樣可以清晰明了地查找出配電故障發(fā)生的區(qū)段。配電網(wǎng)的自動化設(shè)備能夠通過運(yùn)行數(shù)據(jù)分析，對線路故障發(fā)生的區(qū)段進(jìn)行分析研究，以縮小故障點(diǎn)存在的范圍，**鎖定故障位置，能夠在很大程度上縮短查找故障所需要的時間，效率較高。

(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.