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高速铁路接触网悬式复合绝缘子防雷应用特性实验研究

DOI: 10.13336/j.1003-6520.hve.2015.05.021, PP. 1574-1581

Keywords: 高速铁路,棒形悬式复合绝缘子,工频电弧烧损,长期机械性能,脆断,抽芯,线路金属氧化物避雷器,并联间隙装置

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Abstract:

为了促进我国高速铁路复合绝缘子的科学使用,进一步提高接触网运行可靠性,针对接触网用棒形悬式复合绝缘子的防雷应用特性开展研究。采用实验模拟的方法研究了工频电弧烧损绝缘子、影响绝缘子短期机械性能的程度,论证得出工频电弧会降低绝缘子长期机械性能,提出了应对措施并验证了措施的保护有效性。研究结果表明雷击诱发的接触网短路电流电弧会明显烧损棒形悬式复合绝缘子两端部部件,破坏芯棒对外界密封性,虽然不会影响绝缘子短期机械性能,但长期运行后会导致绝缘子发生芯棒脆断和金具锈蚀抽芯故障。对于可能遭受雷击的路段,安装专用线路避雷器或者并联间隙装置实施保护,可避免此类运行安全风险。该结论对电力系统110kV及以下电压等级悬式复合绝缘子同样适用。

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