Research on Lightning Overvoltage and Comprehensive Lightning Proof Measures of 10kV Overhead Insulated Distribution Lines

By calculating the amplitudes of the lightning induced overvoltage and induced current of the overhead insulated distribution lines, this paper studies the damage to the lines caused by induced overvoltage and induced current. According to the calculations, the value of induced overvoltage can be 400 kV and more, greater than overhead insulated lines and obtains the optimal parameters to prevent lightning strike break by adopting insulating cross arms. In the meantime, combining the theoretical analysis, it is known that adopting 400 mm insulating cross arms can prevent lightning break. As a result, depending on different operations and considering comprehensively, this paper puts forward measures as insulating cross arms, the stab type arc protection hardware, lightning proof post insulators and lightning arresters to prevent lightning break.