500 kV惠汕乙线光纤复合架空地线雷击断股分析

输电线路上的避雷线主要用于防雷，将避雷线换成光纤复合架空地线(OPGW)。一方面它既能防雷，又能实现光纤通信，比地埋光缆成本低得多；另一方面，在实际运行中，OPGW也会遭受雷击，造成断股事故。影响安全生产和电力通信。针对广东省500kV惠汕乙线OPGW断股情况，分析其产生的原因主要是雷击和0PGW铝合金股线熔点偏低，为此，提出今后提高OPGW防雷击的一些措施和方法。

Analysis of lightning-caused OPGW strand breakage on 500 kV HuiShan transmission line

The optical fiber composite overhead ground wires (OPGW) on power transmission lines enable both lightning protection and optical fiber communication, which cost much less than underground optical fiber cables. In view of the adverse effect of lightning-caused OPGW strand breakages on operation security and power communication, this paper analyzes the OPGW strand breakage on 500 kV HuiShan transmission line in Guangdong, and concludes that the breakage was caused by lightning and low melting point of the OPGW aluminium alloy strands. Improving measures on OPGW lightning protection are put forth as well.