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彻底消除配电线路的雷电事故安装过电压平台有效果
   采用过电压平台防护配电线路的雷电过电压其作用大致有两个方面:一是保护直击雷,通过吸雷电放电能量,达到保护的目的;二是安装避雷器后能够限制配电线路的感应过电压。过电压平台可以大大降低附近雷击感应电压导致的闪络率。
 
   近几年的研究表明,虽然配电线路安装的过电压平台每年都在增加,但配电线路雷电事故不但没有降低,反而有增加的趋势。分析表明,这主要是由于没有在全线所有杆塔安装过电压平台引起的,一般是隔一基杆塔安装一组过电压平台。而雷电事故主要出现在没有安装过电压平台的杆塔处。
 
    西岱尔专家认为,如果要完全消除配电线路的雷电事故,必须每基杆塔的每相都要安装过电压平台。专家所指的配电线路雷电事故包含了直击雷事故和雷电感应过电压事故。只有在每柱每相上安装过电压平台才能得到好的保护效果。
 
     过电压平台的安装密度与线路感应过电压U1的关系曲线。计算结果表明,过电压平台的密度增加,感应过电压降低。但从对线路构成整个较完整的良好保护的角度出发,还是以每一个间隔档距均安装一组线路过电压平台的方式更好。
 
 
Adopt overvoltage protector the effect of the lightning overvoltage protection distribution circuit generally there are two aspects: one is the direct lightning protection, through the lightning discharge energy absorption, achieve the purpose of protection; Second, after the installation of lightning arrester can limit distribution circuit induced over-voltage. Over-voltage protector can be greatly reduced near lightning flashover rates caused by induction voltage. 
 
 
In recent years, research has shown that although the over-voltage protector of distribution line installation is increasing every year, but did not reduce distribution line lightning accident, it has a tendency to increase. Analysis shows that this is mainly due to not install over-voltage protector in across all tower, generally is a fundamental tower insulation installed a set of over-voltage protector. And lightning accident main without installing overvoltage protector tower. 
 
 
West glendale experts believe that if you want to completely eliminate the distribution line lightning accident, must be installed each tower the every phase of over-voltage protector. Experts referred to in power distribution lines lightning incident includes direct lightning and thunder and lightning induced overvoltage accident. Only in each column over-voltage protector installed on each phase can get good protection effect. 
 
 
The installation of over-voltage protector the relationship between the line U1 induced over-voltage and density of the curve. Calculation results show that the density of over-voltage protector increase, reduce the induced over-voltage. But from the constitute the whole a complete good protection of circuit's perspective, or in the each rails from over-voltage protector installed a set of lines way better. 
 
 
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