架空绝缘配电线路综合防雷措施的应用

Application of comprehensive safety against lightning to insulated overhead distribution lines

按照“疏导”与“堵塞”相结合的配网综合防雷思路,开发了一系列产品,其中,保护型绝缘子可“疏导”雷电流,玻璃钢绝缘横担提高了耐雷水平,保护型间隙横担通过引导架空线路闪络位置并采用限流元件与长闪络距离的协同作用截断工频续流,试验与应用结果表明,能有效降低架空绝缘配网的雷击断线与跳闸的机率。

Based on the comprehensive distribution network lightning protection metbods, which combine the approaches of ＂leading＂ and ＂blocking＂ the lightning current, a series of lightning-protected products were developed. Among them, the protective insulators ean ＂lead＂ the lightning current, the insulated glass fiber reinforced plastic cross arms can increase the lightning impulse withstand level for distribution lines, while the protective insulated cross arms, eonsisting of spark discharge gaps. non-linear resistance current-limiting units, and glass fiber reioforeed plastic cross arms, ean eliminate the power-frequency eontitmous current. Tests and practice show that comprehensive applieation of all these products effectively reduees the line breakage and trip probability caused by lightning strikes for the insulated overhead distribution network.