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Dynamic response analysis of UHVDC transmission lines’ tension plates under deicing conditions

DOI：10.7511/jslx20211207004

 作者 单位 E-mail 吕中宾 国网河南省电力公司电力科学研究院, 河南省电力线路舞动防治技术重点实验室, 郑州 450052 774364829@qq.com 司佳钧 中国电力科学研究院有限公司, 北京 102401 张博 国网河南省电力公司电力科学研究院, 河南省电力线路舞动防治技术重点实验室, 郑州 450052 邹乔戈 华中科技大学 电气与电子工程学院, 武汉 430074 李冬青 中国电力科学研究院有限公司, 北京 102401 李黎 华中科技大学 电气与电子工程学院, 武汉 430074

耐张联板作为连接输电线路和绝缘子的重要构件,研究其在脱冰工况下的动态响应特性对保证输电线路安全稳定运行具有重要意义。通过搭建两种典型的特高压直流输电线路耐张段模型,以输电线路的脱冰振动作为荷载来源,对耐张联板的动态响应及屈曲特性进行分析。最后通过试验验证,测量耐张联板的受力以及屈曲状态,评估耐张联板屈曲的临界值。结果表明,耐张联板在脱冰工况下的动态响应特性及屈曲特性主要受输电线路沿线载荷影响,最剧烈的振荡发生在脱冰现象的前20 s内,并且在耐张档脱冰工况下会发生最严重的屈曲变形,应力载荷主要集中在螺栓孔包围的梯形区域内。研究结果为耐张联板的结构优化设计提供了参考依据。

As an important component connecting the transmission line and the insulator,it is of great significance to study the dynamic response characteristics of the tension plate under de-icing conditions to ensure the safe and stable operation of a transmission line.By building two typical models of the tensile section of a UHVDC transmission line,and taking the deicing vibration of the transmission line as the load source,the dynamic response and buckling characteristics of the tension plate are analyzed.Finally,in an experimental verification,the stress and buckling state of the tension plate are measured,and the critical buckling load of the tension plate is evaluated.The results show that the dynamic response characteristics and buckling characteristics of the tension plate under the deicing condition are mainly affected by the load along the transmission line.The most severe oscillation occurs within the first 20s of the deicing condition,and the most severe buckling deformation occurs in the deicing condition of the tension section,and the stress load is mainly concentrated in the trapezoidal area surrounded by the bolt holes.This research provides a reference for the structural optimization design of the tension plate.