变电站绝缘子抗震性能试验及数值模拟研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (5) : 83-91.

论文

变电站绝缘子抗震性能试验及数值模拟研究

吴星霞1,2，郑山锁1,2，刘晓航1,2，杨丰3，李永明1

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Aseismic performance tests and numerical simulation of substation insulators

WU Xingxia1,2, ZHENG Shansuo1,2, LIU Xiaohang1,2, YANG Feng3, LI Yongming1

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摘要

作为变电站重要基础设施之一，变电站绝缘子的抗震性能直接影响了电力系统的可靠性。本文采用低周往复加载试验，从高度、轴压比及绝缘子拼装数量三个方面探讨了变电站绝缘子的抗震性能，对比分析了各绝缘子试件基于上述参数下破坏特征、滞回曲线、变形能力、耗能能力和承载能力等抗震性能指标。试验结果表明：绝缘子试件在低周循环加载试验后均发生了弯曲破坏。随着绝缘子试件高度和绝缘子拼装数量的增加，其耗能能力与承载能力逐渐减弱。随着轴压比的增加，滞回曲线的饱满程度和累积耗能能力显著降低，承载能力逐渐增强。最后，基于实验建立的精细化有限元模型与试验结果进行了对比从而验证了模型的可靠性，为本课题后续电力系统抗震性能分析提供有效依据。

Abstract

As one of the important basic facility in substation, the seismic performance of substation insulators directly affects the seismic reliability of substation system. Using quasi-static loading test, the aseismic performance of substation insulators is discussed from three aspects: height, axial pressure ratio and number of insulators assembled. Bearing capacity, deformation capacity, hysteresis curve, and energy dissipation capacity are analyzed based on the above parameters. The test results show that all insulator specimens undergo bending failure after quasi-static loading test. The bearing capacity and energy dissipation capacity of the specimens gradually deteriorate with the increase of the height of the specimens. As the number of insulators decreases, The peak bearing capacity and energy consuming capacity of each insulator decreases as the number of insulators increases. Finally, a refined finite element model is established based on experiments and its reliability is verified, which lays a foundation for subsequent seismic analysis of power system.

关键词

绝缘子 / 滞回曲线 / 拟静力试验 / 抗震性能

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吴星霞1,2，郑山锁1,2，刘晓航1,2，杨丰3，李永明1. 变电站绝缘子抗震性能试验及数值模拟研究[J]. 振动与冲击, 2023, 42(5): 83-91

WU Xingxia1,2, ZHENG Shansuo1,2, LIU Xiaohang1,2, YANG Feng3, LI Yongming1. Aseismic performance tests and numerical simulation of substation insulators[J]. Journal of Vibration and Shock, 2023, 42(5): 83-91

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