特高压变电站高抗电气设备瓷套管抗震性能研究

发布时间：2018-03-15 08:53

本文选题：特高压变电站　切入点：高抗本体-套管体系　出处：《中国电力科学研究院》2017年硕士论文　论文类型：学位论文

【摘要】：特高压输电工程是解决我国能源分配不均、环境污染的重要措施,为我国经济发展提供清洁电力能源,在电力能源输配领域作用举足轻重,其安全运行关系国计民生。高压并联电抗器(高抗)是变电站中的重要电气设备,主要破坏方式为电抗器本体发生倾倒和移位,或是设备上的高压套管断裂、错位。唐山大地震后,我国地震区的高抗设备与基础的连接多已采取加固措施,设备本体的破坏情况有所减轻。但是设备本体上的瓷套管在强震作用下仍然会发生严重损坏。本文结合特高压电气设备的结构特点,建立了高抗本体-套管体系数值仿真模型,重点以最薄弱的套管为分析对象,采用理论分析、数值仿真分析和振动台试验等研究手段,完成了 4项重要研究内容:(1)特高压变电站高抗本体-套管体系动力特性及地震反应研究。建立高抗本体-套管体系数值仿真模型,研究设备瓷套管的动力特性包括振型、频率分布、参振质量分布等规律,以及设备本体参数对设备瓷套管的地震影响规律。(2)特高压变电站高抗本体-套管体系相似模型设计研究。基于动力模型相似理论提出了易于实现振动台试验且忽略重力影响的合理的特高压高抗本体-套管体系的相似模型设计方法。(3)特高压变电站高抗本体-套管体系隔震技术研究。建立忽略重力影响的特高压高抗本体-套管体系相似数值仿真模型,并进行隔震设计分析,利用理论分析确定隔震器参数,通过数值仿真计算高抗本体-套管体系安装隔震器后套管的地震响应,计算结果显示,安装隔震器后套管地震响应减小50%以上,隔震效果显著。(4)特高压变电站高抗本体-套管体系振动台试验研究。对特高压高抗本体-套管体系相似模型进行振动台试验,研究套管在地震作用下的地震反应规律及验证隔震设计方案的有效性。试验结果和仿真结果显示,对于抗震结构,两者吻合度较高,数值仿真模型基本能够反映电抗器套管在地震波作用下的地震响应,隔震技术减小了电抗器套管的最大应变响应,在地震等级较高时减小幅度达50%以上,隔震效率显著。
[Abstract]:UHV transmission project is an important measure to solve the problem of uneven energy distribution and environmental pollution in China. It provides clean power energy for the economic development of our country and plays an important role in the field of power energy transmission and distribution. High voltage shunt reactor (high reactance) is an important electrical equipment in substation. The main failure mode is that the reactor body is dumped and shifted, or the high voltage casing breaks on the equipment. Dislocation. After the Tangshan earthquake, most of the connections between the high resistance equipment and the foundation in the earthquake area of China have been strengthened. The damage of the equipment body has been alleviated, but the porcelain casing on the equipment body will still be seriously damaged under the strong earthquake. In this paper, the numerical simulation model of the high resistance Noumenon casing system is established according to the structural characteristics of the UHV electrical equipment. Focusing on the weakest casing as the object of analysis, using theoretical analysis, numerical simulation analysis and shaking table test and other research means, The dynamic characteristics and seismic response of high resistance bulk casing system in UHV substation have been studied. A numerical simulation model of high resistance bulk casing system has been established to study the dynamic characteristics of porcelain casing, including the mode of vibration. Frequency distribution, mass distribution, etc. And the influence of equipment body parameters on the earthquake of equipment porcelain casing. (2) the design of similarity model of high resistance bulk casing system in UHV substation. Based on the similarity theory of dynamic model, it is proposed that the shaking table test is easy to be realized and the vibration table test is easy to be realized. Study on isolation Technology of High Voltage bulk-casing system in UHV Substation with reasonable similarity Model Design method of UHV High Resistance bulk-casing system with slight Gravity effect. Similar numerical simulation model of casing system, The isolation design is analyzed and the parameters of the isolator are determined by theoretical analysis. The seismic response of the casing after the installation of the isolator is calculated by numerical simulation. The calculated results show that, After installing the isolator, the seismic response of the casing is reduced by more than 50%, and the isolation effect is remarkable. The shaking table test of the high resistance body-casing system in UHV substation is carried out. The shaking table test is carried out on the similar model of the UHV and HV Noumenon casing system. This paper studies the seismic response of casing under earthquake and verifies the effectiveness of seismic isolation design. The experimental results and simulation results show that for seismic structures, the two agree well. The numerical simulation model can basically reflect the seismic response of the reactor casing under the action of seismic wave. The isolation technique reduces the maximum strain response of the reactor casing, and the amplitude decreases by more than 50% when the earthquake grade is high, and the isolation efficiency is remarkable.
【学位授予单位】：中国电力科学研究院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.12

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