特高压换流站气体绝缘金属封闭输电线路(GIL)抗震性能提升方法研究
随着气体绝缘金属封闭输电线路(GIL)在特高压换流电站中的广泛应用,地震对其结构安全的影响备受关注。文中基于精细化有限元模型,分析了GIL在地震作用下的响应特征,并针对抗震薄弱点提出了针对性的性能提升方法。研究表明,GIL的主要薄弱点位于竖向转角处,存在外壳强度破坏和内部导体接头拔出破坏两种模式。此外,支架的动力放大效应显著,加速度放大系数通常超过2.0,但支架的动力放大作用并非唯一决定GIL抗震性能的因素。通过提高支架的基频和固定支架与外壳的连接方式,能够有效降低内部导体的相对位移峰值和外壳的应力峰值,
王电处, 余荣兴, 李浩丹, 张涵
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