复合绝缘子倾斜支撑干式空心电抗器地震模拟震动台试验

为研究复合绝缘子倾斜支撑干式空心电抗器在地震作用下的机械结构特性,依托于榆横—潍坊1000 kV特高压交流输变电工程,对干式空心电抗器进行地震模拟震动台试验,并对各部件的加速度响应、应变响应以及位移响应结果进行分析。结果表明:1)地震模拟震动台试验时,电抗器上支架根部加速度放大系数为2.80,是各部件中加速度放大系数最大位置;2)荷载效应组合后,绝缘子计算应力最大值为35.73 MPa,安全系数为2.18,满足标准大于1.67的要求,是支撑体系最薄弱环节;3)抗震试验后,线圈本体通风条无掉落,绑扎带无断裂,防雨帽未掉落,星形架无变形,复合绝缘子表面无裂纹和破损,胶装位置无裂缝,抗震试验合格。该地震模拟震动台试验可为干式空心电抗器抗震特性方面的研究提供参考依据。

Seismic Simulation Shaking Table Test on Dry-Type Air-Core Reactor Inclined Supported by Composite Insulators

In order to study the mechanical characteristics of the dry-type air-core reactor inclined supported by composite insulators under seismic,the seismic simulation shaking table test is carried out on dry-type air-core reactor and the responses of acceleration,strain,displacement of each part are analyzed based on Yuheng-Weifang 1000 kV UHV AC transmission project.The test results indicate three points.Firstly,during the seismic simulation shaking table test,the acceleration amplification factor at the root of upper bracket is 2.80 which is the maximum value among each part.Secondly,after load effect combination,the maximum calculated stress of insulators is 35.73 MPa,the safety coefficient is 2.18 which meets the requirement of greater than 1.67 specified in the standard and the insulators are the weakest links of the whole support system.Thirdly,the reactor has no drop of insulation struts,no break of binding band,no drop of top cover,no deformation of spider arms,no crack and damage on composite insulators and no crack in its gluing position after the seismic test,which means that the reactor pass the test.This seismic simulation shaking table test provides the reference for the research on seismic performance of dry-type air-core reactor.