淮上线1000kV特高压跨越段架线施工设计及动态仿真

发布时间：2018-03-10 01:16

本文选题：输电线路　切入点：张力架线　出处：《东北电力大学》2017年硕士论文　论文类型：学位论文

【摘要】：张力放线施工是架空输电线路施工技术中颇为重要的一道工序,从人力展放导引绳逐步发展为采用动力伞、无人机等方式展放导引绳。架设施工现场复杂多变,施工涉及面积大从而没有办法进行完整架线过程的试验。人为计算施工参数可能会造成资源浪费或忽视潜在的危险。现有的线路架设仿真系统,是将传统理论公式计算的结果呈现于图纸之上,而针对导线、滑轮动态特性的研究较为少见。本文以淮南-南京-上海1000kV特高压跨越段输电线路工程为研究背景,针对该线路进行架线施工方案的编制,并利用动力学软件对架线段施工进行动态仿真,分析导线过滑轮的动态特性,为实际施工提供参考性建议。本文根据1000kV多分裂导线施工的特点,基于施工现场的具体情况编制特高压架线施工方案,主要包括施工的场地布置、主要施工工艺与工序的介绍以及对施工所用的机械和设备进行相关的计算。利用ADAMS虚拟样机技术,对张力架线系统进行仿真模拟。大变形柔性体导线和牵引绳的建模采用的是轴套力方法,编写命令流语言可以实现快速建模。通过适当的精简模型和减少接触力的数目来实现仿真速度的优化。通过对跨越段进行牵引系统的动力学仿真,提取导线及牵引绳的轴向张力,放线滑车的竖向、横向荷载以及与牵引板的碰撞力,研究系统的动态特性便于确定导线、牵引绳最大张力出现的时间和位置。仿真提取结果与理论公式计算结果相比较,误差在5%左右。牵引绳、导线的轴向速度均维持在1m/s,当牵引板通过滑轮时轴向张力和碰撞力均会骤增。本文最后还对架线过程中导线在扭转载荷下的应力进行了有限元模拟,分析导线在架线过程中应力的变化。本文较为全面地总结了1000kV特高压张力展放多分裂、大截面导线的流程和作业方法,可以为施工人员在今后的特高压多分裂导线张力放线的架线方案制定中提供参考。仿真起始时,导线、牵引绳瞬时张力变大,高出导线正常张力2倍左右,整体稳定性较差,会对整个架线系统产生较大冲击。牵引板与滑车碰撞力也达到23kN,会对杆塔造成一定的冲击,在牵引板接近滑车时应减速缓慢通过。通过本文的模拟仿真,便于发现施工中潜在的危险,以便在实际施工操作中调整张牵设备的牵引力,更好地实现机械化作业,可以较为科学地指导实际施工操作。
[Abstract]:Tension laying out construction is a very important working procedure in overhead transmission line construction technology. It has gradually developed from manual deployment and guidance rope to use power umbrella, UAV and so on. The construction site is complex and changeable. Construction involves a large area so that there is no way to conduct the test of a complete wiring erection process. Artificial calculation of construction parameters may result in waste of resources or neglect of potential dangers. Existing line erection simulation systems, The results of the traditional theoretical formulas are presented on the drawings, but the dynamic characteristics of the conductors and pulleys are seldom studied. This paper takes the Huainan Nanjing Shanghai 1000kV UHV transmission line project as the research background. According to the compilation of the construction scheme of the wire, the dynamic simulation of the construction of the frame line segment is carried out by using the dynamic software, and the dynamic characteristics of the conductor passing through the pulley are analyzed. According to the construction characteristics of 1000kV multi-splitting conductors and based on the concrete conditions of the construction site, the construction scheme of UHV wire erection is worked out, which mainly includes the site layout of the construction. Introduction of main construction technology and process, and calculation of machinery and equipment used in construction. Using ADAMS virtual prototyping technology, The large deformation flexible body conductors and towing ropes are modeled by using the axle-sleeve force method. The command flow language can be used to realize fast modeling, to optimize the simulation speed by reducing the number of contact forces and to reduce the number of contact forces. The axial tension of the wire and the traction rope, the vertical and lateral load of the emitter pulley and the collision force with the traction board are extracted. The study of the dynamic characteristics of the system facilitates the determination of the conductor. The time and position of maximum tension of traction rope. Compared with the result of theoretical formula, the error is about 5%. The axial velocities of the conductors are maintained at 1 m / s, and the axial tension and collision force increase sharply when the traction plate passes through the pulley. Finally, the stress of the conductor under the torsional load is simulated by finite element method. In this paper, the flow and working methods of 1000 kV UHV tension expansion and discharge with multi-splitting and large-section conductors are summarized. It can be used as a reference for the construction personnel in the future development of the cable stringing scheme of UHV multi-splitting wire tension. At the beginning of the simulation, the instantaneous tension of the wire and the traction rope becomes larger, which is about 2 times higher than the normal tension of the wire, and the overall stability is poor. The collision force between the traction board and the pulley will reach 23kNs, which will cause a certain impact on the pole tower. When the traction plate approaches the pulley, it should slow down and pass slowly. Through the simulation of this paper, It is convenient to find the potential danger in construction so as to adjust the traction force of the tensioning equipment in the actual construction operation, to realize mechanized operation better, and to guide the actual construction operation more scientifically.
【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】：TM752

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