经研究人员分析发现,多数杆塔雷击事故的直接发生都可能是由于产生的雷电直

According to the analysis of the researchers, it is found that most of the direct lightning strike accidents may be caused by the lightning that directly hits the transmission line or indirectly hits the open and hidden area near the transmission line, causing tripping and overvoltage. phenomenon. The main cause of this overvoltage phenomenon lightning strike accident is directly related to the entire tower line grounding device. If the standard values ​​of conductivity and impedance of the tower line ground are higher than the standard values, it may directly reduce the lightning resistance level of the entire transmission line. In addition, the height of the tower may also directly affect the lightning protection and counterattack ability of the entire transmission line.The higher the standard value of the tower height, the larger the area of ​​the lightning, the weaker the lightning protection counterattack ability of the transmission line, and the probability of the transmission line counterattack It is also relatively higher, which is more likely to cause trips.

经研究人员分析发现,多数杆塔雷击事故的直接发生都可能是由于产生的雷电直接地击中了输电线路或者特别是间接地击中了输电线路附近的空旷隐蔽地带,造成了跳闸和过电压的现象。导致发生这种过电压现象雷击事故的主要原因和整个杆塔线路接地装置直接的高度相关。杆塔线路接地的导电率和阻抗标准值如果高于标准值,就可能会直接地降低整个输电线路的耐雷能力水平。另外杆塔高度也可能会直接影响整个输电线路的防雷反击能力,杆塔高度的标准值越高,引雷的面积就越大,输电线路的防雷反击能力就越弱,且输电线路反击的概率也相对越高,更容易造成跳闸。

Through the analysis of researchers, it is found that the direct occurrence of most tower lightning accidents may be caused by the lightning directly hitting the transmission line or indirectly hitting the open and hidden area near the transmission line, resulting in the phenomenon of tripping and over-voltage. The main cause of lightning stroke accident is directly related to the grounding device of the whole tower line. If the standard value of electric conductivity and impedance of tower line is higher than the standard value, it may directly reduce the lightning resistance level of the whole transmission line. In addition, the tower height may also directly affect the lightning protection and counterattack capacity of the whole transmission line. The higher the standard value of tower height is, the larger the lightning area is, the weaker the lightning protection and counterattack capacity of the transmission line is, and the higher the probability of the transmission line counterattack is, the easier it is to cause tripping.<br>