220kV梅江河跨越段線路防振設計與試驗研究
發(fā)布時間：2019-06-27 14:31
【摘要】：大跨越工程水面上層容易形成層流風,其產生的微風振動可使導線線股產生交變的應力和應變。當振動水平很大時,容易引起架空線疲勞斷線,威脅輸電線路的運行安全。因此,必須采取防振措施。由于輸電線路微風振動的非線性,目前尚不能完全通過理論計算制定防振方案,因此,為了保證導地線的運行安全,有必要進行導地線的微風振動模擬試驗,從中優(yōu)選出理想的防振方案。本文基于實際工程背景和國內外對于輸電線微風振動防治方面理論與試驗研究現狀,以大埔電廠—嘉應站、大埔電廠—長沙站輸電線路工程梅江河跨越段為研究對象,論述了工程采用的大截面導線、地線及OPGW光纜微風振動試驗研究的過程和原理。主要從防振錘防振、阻尼線防振、阻尼線與防振錘聯合防振三個方面對大跨越的多種不同的防振方案進行了設計與試驗研究,通過試驗數據得到工程采用的三種型號輸電線自阻尼特性表達式和導線采用各防振方案時的頻響特性曲線。通過對各組頻響特性曲線的對比判定其防振效果的優(yōu)劣,得出其變化規(guī)律,并根據試驗結果優(yōu)選出合理的防振方案。試驗結果表明:防振錘的個數對導線的振動水平影響很大,能夠改變輸電線的振動特性,擴大防振裝置的頻率保護范圍。長阻尼線花邊對低頻的防振效果較短阻尼線花邊顯著,阻尼線對高頻的防振效果良好。防振錘與阻尼線聯合防振可以發(fā)揮防振錘與阻尼線的特點,防振效果比較理想。防振鞭同防振錘和阻尼線的防振效果相比還有差距,不推薦使用其作為本線路的防振裝置。優(yōu)選出的防振方案滿足技術要求,具有良好的防振效果,可以顯著降低導地線的微風振動水平,保證輸電線路的安全運行。
[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.
【學位授予單位】：東北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM75
本文編號：2506874
[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.
【學位授予單位】：東北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM75
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