| 引用本文: | 楼文娟,周为政,张跃龙,白航,陈科技.输电线路跳线风偏响应分析及手册计算方法修正[J].哈尔滨工业大学学报,2021,53(10):79.DOI:10.11918/202105117 |
| LOU Wenjuan,ZHOU Weizheng,ZHANG Yuelong,BAI Hang,CHEN Keji.Wind-induced swing response analysis of jump line and modification of manual calculation method[J].Journal of Harbin Institute of Technology,2021,53(10):79.DOI:10.11918/202105117 |
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| 摘要: |
| 为降低输电线路跳线风偏带来的安全隐患,保证电力传输安全,需要准确估计其风偏动力响应。现有《电力工程高压送电线路设计手册》中的跳线风偏计算方法忽略了风荷载的脉动放大效应,以此设计的线路可能偏不安全。通过建立某高压输电线路有限元耦联模型,采用非线性有限元方法计算了直引、绕引跳线的风偏响应,并与手册计算方法进行了对比分析,指出了手册计算方法的不足。在此基础上,采用等效静力风荷载代替跳线水平风载,通过引入风荷载调整系数βc来考虑风载的脉动放大效应,对手册计算方法进行了修正。研究结果表明:手册计算方法忽略了脉动风荷载放大效应,会严重低估跳线风偏响应,与有限元仿真结果对比最大误差约37%；修正方法计算得到的跳线风偏响应与有限元结果非常接近。本文提出的修正方法可用于精细化估算跳线风偏响应。 |
| 关键词: 跳线风偏 数值模拟 手册计算方法 风荷载调整系数 修正方法 |
| DOI：10.11918/202105117 |
| 分类号:TM726 |
| 文献标识码:A |
| 基金项目:国家自然科学基金重点项目(51838012) |
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| Wind-induced swing response analysis of jump line and modification of manual calculation method |
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LOU Wenjuan1,ZHOU Weizheng1,ZHANG Yuelong1,BAI Hang1,2,CHEN Keji3
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(1.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China; 2.Sichuan Institute of Building Research, Chengdu 610000, China; 3.Economic Research Institute, State Grid Zhejiang Electric Power Co. Ltd., Hangzhou 310008, China)
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| Abstract: |
| To reduce the safety hazards caused by the wind-induced swing of transmission jump lines and to ensure the safety of power transmission, it is necessary to accurately estimate the dynamic response of the wind-induced swing. The current calculation method for wind-induced swing of jump lines in the Electric Power Engineering Design Manual of High Voltage Transmission Lineignores the pulsation amplification effect of the wind load, and the lines designed based on this method may be unsafe. A finite element coupling model of a high-voltage transmission line was established and the non-linear finite element method was used to calculate the wind-induced swing response of direct and circuitous jump lines. Meanwhile, comparison and analysis were carried out to figure out the shortcomings of the manual calculation method. On this basis, the equivalent static wind load was used to replace the horizontal wind load of the jump lines, and the wind load adjustment factor βc was introduced to give consideration to the pulsation amplification effect of the wind load for revising the calculation method of the manual. Research results show that the manual calculation method ignored the pulsation amplification effect of wind load, which would seriously underestimate the wind-induced swing response of the jump lines.The maximum error between the manual calculation method result and the finite element result was about 37%, while the wind-induced swing response of the jump line calculated by the correction method was very close to the finite element result. The correction method proposed in this paper can be used to finely estimate the wind-induced swing response of jump lines. |
| Key words: wind-induced swing of jump line numerical simulation manual calculation method adjustment factor of wind load correction method |
