大跨越覆冰输电线路的脱冰跳跃机理与控制研究

项目名称： 大跨越覆冰输电线路的脱冰跳跃机理与控制研究

项目编号： No.11272119

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 谢献忠

作者单位： 湖南科技大学

项目金额： 82万元

中文摘要： 系统研究大跨越连续档覆冰输电线路因脱冰导致的非线性大幅耦合振动机理、能量转换机制及其最优的减振控制技术和方法。考虑相邻档间的动力耦合和几何非线性，基于Hamilton变分原理建立输电塔线体系的精细动力学模型；通过该模型全面分析输电线路的基本动力学特性和非线性特性，导出最大跳跃高度、最大不平衡动张力计算公式，从能量转换角度揭示输电线路脱冰跳跃的大幅振动机理和动力学耦合机理；根据动力相似原理设计、制作由跨越档和耐张档构成的两档塔线体系试验模型，采用无线程控技术模拟脱冰过程，测试、分析各种复杂脱冰工况下塔线体系的动力响应，并验证连续档耦合模型及其机理研究的正确性；提出一种利用绝缘子串的小幅摆动控制输电线路大幅横向振动的减振控制方法，研制新型的粘弹性角位移阻尼器、旋转剪切式磁流变阻尼器及相应的半主动控制系统；基于数值和试验分析结果，从非线性动力学角度评估控制系统的减振性能，确定最优的控制方案。

中文关键词： 输电线路；脱冰；非线性振动；耦合振动；控制

英文摘要： The present research is a systematic investigation of theories of coupling nonlinear vibration of large amplitude, energy conversion mechanism and control method of vibration, which is inspired by ice-shedding of continuous long span transmission line of power. In view of the dynamic coupling of ajacent spans and geometric nonlinearity of large displacement,and based on Hamilton's variational principle, a fine dynamics model of tower-line system of power transmission is established, with which the fundamental characteristics of nonlinear dynamics of transmission line are studied comprehensively. The formulae of maximum jump height and non equibrium dynamic tension are derived. The theories of vibration of large amplitude and dynamic coupling mechanism are revealed from the point of view of energy conversion. The tower-line model of two spans with crossing section and tensionning section is designed and manufactured according to the principle of dynamic similarity. Through the experiment of simulating ice-shedding by means of wireless program-controlled technology, the dynamic responses of tower-line system under various working conditions are tested and anaylsed, which verify the correctness of the coupling model of transmission line of power. A new method to reduce the vibration is put forward, which utilizes

英文关键词： transmission line；ice-shedding；nonlinear vibration；coupling vibration；control