管母耦联的特高压复合双支柱设备地震响应及影响分析  

Seismic Response and Impact Analysis of UHV Composite Double⁃pillar Equipment with Tubular⁃busbar Coupling

作　　者：李强 张长虹 余荣兴[3] 陈超泉 LI Qiang;ZHANG Changhong;YU Rongxing;CHEN Chaoquan(CSG Extra High Voltage Power Transmission Company,Dali Bureau,Yunnan Dali 671000,China;Extra High Voltage Power Transmission Company Electric Power Research Institute,Guangzhou 510000,China;China Southern Power Grid Co.,Ltd.,Guangzhou 510000,China)

机构地区：[1]中国南方电网有限责任公司超高压输电公司大理局,云南大理671000 [2]超高压输电公司电力科研院,广州510000 [3]中国南方电网有限责任公司,广州510000

出　　处：《高压电器》2025年第4期72-82,共11页High Voltage Apparatus

摘　　要：近年来,复合支柱绝缘类设备逐渐在特高压变电站中得到应用,然而其弹性模量相对瓷质设备更小,使得设备刚度更低、体系更柔。为研究其耦合体系抗震性能以及对地震强度等因素的影响,文中首先介绍了所采用的结构动力响应分析理论,进而采用Abaqus软件建立了管母耦联的±800 kV复合双支柱绝缘子设备体系,该体系两端为一端固定一端滑动。随后,分析并比较该体系不同方向的模态振型,基于所建立的仿真模型进行动力响应分析,并分别考虑了地震强度、频谱及多维地震耦合对于该耦联体系地震响应的影响。结果表明:耦联体系的面内前3阶频率均高于对应的面外前3阶频率;当地震动幅值在0.4g范围以内,绝缘子根部应变、顶部加速度及位移反应与地震波幅值近似成线性关系;管母耦联效应不论对于支柱绝缘子的固定连接还是滑移连接,均能保持对其顶部位移的降低作用,并降低根部应力水平;在多维地震动输入下,随着地震动维数的增加,原方向的加速度值呈增加趋势;耦联复合支柱绝缘子在0.4g地震下位移反应较大,位移与绝缘子高度比值达到1/31,但根部应变水平较低,仍处于线弹性阶段。In recent years,composite pillar insulation equipment has been used gradually in ultra high-voltage(UHV)substations.However,its elastic modulus is smaller than that of ceramic equipment,which makes the rigidity of equipment more low and system more flexible.For studying the seismic performance of its coupling system and the influence on such factors as seismic intensity,the structural dynamic response analysis theory is introduced firstly in this paper.Then,the Abaqus software is used to set up a±800 kV composite double-pillar insulator equipment sys-tem with a tubular-bus coupling,one end of the system is fixed and the other end is sliding.After that,the modal vi-bration shapes of the system in different directions are analyzed and compared,the dynamic response analysis is per-formed based on the established simulation model and the influence of seismic intensity,spectrum and multi-dimen-sional seismic coupling on the seismic response of the coupling system is considered respectively.The results show that the first three in-plane frequencies of the coupling system are higher than the corresponding out-of-plane fre-quencies.When the seismic amplitude is in the range of 0.4g,the root of the insulator strains,the top acceleration and displacement response of the insulator are approximately linearly related to the seismic amplitude.The tubular bus-bar coupling effect,either for the fixed connection or for sliding connection,can maintain its reduction effect on the top displacement and can reduce the bottom stress level.Under multi-dimensional seismic input,the acceleration in the original direction increases with the increase of the seismic dimension.The displacement response of the cou-pling composite pillar insulator is large under seismic at 0.4g,and the ratio of displacement to the height of insulator height is up to 1/31,but the root strain level is low and is still at the linear elastic stage.

关 键 词：地震响应 管母 耦联效应 特高压设备 复合绝缘子 地震耦合 

分 类 号：TM63[电气工程—电力系统及自动化] TM85