220kV梅江河跨越段线路防振设计与试验研究

发布时间：2019-06-27 14:31

【摘要】：大跨越工程水面上层容易形成层流风,其产生的微风振动可使导线线股产生交变的应力和应变。当振动水平很大时,容易引起架空线疲劳断线,威胁输电线路的运行安全。因此,必须采取防振措施。由于输电线路微风振动的非线性,目前尚不能完全通过理论计算制定防振方案,因此,为了保证导地线的运行安全,有必要进行导地线的微风振动模拟试验,从中优选出理想的防振方案。本文基于实际工程背景和国内外对于输电线微风振动防治方面理论与试验研究现状,以大埔电厂—嘉应站、大埔电厂—长沙站输电线路工程梅江河跨越段为研究对象,论述了工程采用的大截面导线、地线及OPGW光缆微风振动试验研究的过程和原理。主要从防振锤防振、阻尼线防振、阻尼线与防振锤联合防振三个方面对大跨越的多种不同的防振方案进行了设计与试验研究,通过试验数据得到工程采用的三种型号输电线自阻尼特性表达式和导线采用各防振方案时的频响特性曲线。通过对各组频响特性曲线的对比判定其防振效果的优劣,得出其变化规律,并根据试验结果优选出合理的防振方案。试验结果表明:防振锤的个数对导线的振动水平影响很大,能够改变输电线的振动特性,扩大防振装置的频率保护范围。长阻尼线花边对低频的防振效果较短阻尼线花边显著,阻尼线对高频的防振效果良好。防振锤与阻尼线联合防振可以发挥防振锤与阻尼线的特点,防振效果比较理想。防振鞭同防振锤和阻尼线的防振效果相比还有差距,不推荐使用其作为本线路的防振装置。优选出的防振方案满足技术要求,具有良好的防振效果,可以显著降低导地线的微风振动水平,保证输电线路的安全运行。
[Abstract]:The upper layer of the water surface of the large-span engineering is easy to form a flow wind, and the generated breeze vibration can lead the wire strand to generate alternating stress and strain. When the vibration level is large, the fatigue of the overhead line can be easily caused, and the operation safety of the power transmission line is threatened. Therefore, anti-vibration measures must be taken. Because of the non-linearity of the breeze vibration of the power transmission line, the anti-vibration scheme can not be established completely by the theory calculation. Therefore, in order to ensure the operation safety of the guide wire, it is necessary to conduct the simulation test of the breeze vibration of the earth guide wire, from which the ideal anti-vibration scheme is preferred. In this paper, based on the actual engineering background and the research status of the theory and test on the control of the breeze vibration of the transmission line at home and abroad, the paper discusses the large-section conductor adopted in the project by taking the crossing section of the Meijiang River crossing section of the power transmission line project of the Tai Po Power Plant at the station, the Tai Po Power Plant and the Changsha Station of the Tai Po Power Plant as the research object. The process and principle of the research on the wind vibration test of ground wire and OPGW optical cable. The design and test of a large span of different anti-vibration schemes are carried out mainly from three aspects, such as anti-vibration of the anti-vibration hammer, the anti-vibration of the damping line, the combination of the damping wire and the anti-vibration hammer, The self-damping characteristic expression of three types of transmission lines adopted by the project and the frequency response characteristic curve when the wires are used for each anti-vibration scheme are obtained through the test data. Through the comparison of the frequency response characteristic curves of each group, the anti-vibration effect is determined, and the variation law is obtained, and a reasonable anti-vibration scheme is preferably obtained according to the test result. The test results show that the number of the anti-vibration hammer has great influence on the vibration level of the wire, can change the vibration characteristic of the transmission line and enlarge the frequency protection range of the anti-vibration device. The effect of the long-damping line on the low-frequency vibration-proof effect is shorter than that of the short damping line, and the damping line has good anti-vibration effect on the high-frequency. The anti-vibration hammer and the damping wire can be used for anti-vibration, and the vibration-proof hammer and the damping wire can be used for preventing the vibration-proof effect from being more ideal. Compared with the anti-vibration effect of the anti-vibration hammer and the damping wire, the anti-vibration whip is not recommended to use as the anti-vibration device of the circuit. The preferred anti-vibration scheme meets the technical requirement, has good anti-vibration effect, can remarkably reduce the breeze vibration level of the guide wire and ensure the safe operation of the power transmission line.
【学位授予单位】：东北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM75

【参考文献】