钢筋混凝土电缆排管的技术经济性分析与优化设计
发布时间：2019-06-12 09:45
【摘要】：高压电缆运行时将在地下钢筋混凝土排管中产生铜耗和铁耗。而这些损耗,包括电缆本身的损耗,不仅浪费了电能,同时还将影响电缆和排管的温度场分布。为解决传输线电流在传统钢筋混凝土地下电缆排管中产生涡流损耗而造成的电能浪费问题,论文将有限元数值分析技术应用于地下复杂环境涡流—温度场的分析与计算。提出了地下电缆排管涡流—温度耦合场的三维有限元模型,兼顾求解速度和计算精度需求的剖分方法以及多物理耦合场的迭代求解方法。论文通过对几种典型钢筋混凝土结构地下电缆排管的涡流场与温度场的数值分析,得到了在不同工况下典型钢筋混凝土结构地下电缆排管中金属构件的涡流分布,整个场域的温度场分布和谐态工况下的电缆线芯温度。并据此提出了玻璃纤维筋(Glass Fiber Reinforced Polymer,GFRP)代替传统钢筋的解决方案,通过数值仿真计算了替换后电缆排管中温度场的分布,进而从技术角度论证方案的可行性。论文对比分析了以实际工程为依托的两种典型结构电缆排管的技术特点和经济性能。数值分析结果表明,基于玻璃纤维筋电缆排管的替代方案在降低涡流损耗的同时具有更好的经济效益。
[Abstract]:Copper and iron consumption will be produced in underground reinforced concrete pipe arrangement when high voltage cable is running. These losses, including the loss of the cable itself, not only waste electricity, but also affect the temperature field distribution of the cable and the arrangement pipe. In order to solve the problem of power waste caused by vortex loss caused by transmission line current in traditional reinforced concrete underground cable pipe arrangement, the finite element numerical analysis technique is applied to the analysis and calculation of vortex temperature field in underground complex environment. A three-dimensional finite element model of vortex-temperature coupling field for underground cable arrangement is proposed, which takes into account the requirements of solving speed and calculation accuracy, and an iterative method for solving multi-physical coupling field. Based on the numerical analysis of the Eddy current field and temperature field of several typical reinforced concrete structure underground cable pipes, the Eddy current distribution of metal components in the underground cable arrangement pipe of typical reinforced concrete structure under different working conditions, the temperature field distribution of the whole field and the cable core temperature under harmonic condition are obtained in this paper. Based on this, the solution of replacing the traditional steel bar with glass fiber reinforcement (Glass Fiber Reinforced Polymer,GFRP) is put forward, and the distribution of temperature field in the replaced cable pipe is calculated by numerical simulation, and the feasibility of the scheme is demonstrated from the technical point of view. In this paper, the technical characteristics and economic performance of two typical cable arrangement pipes based on practical engineering are compared and analyzed. The results of numerical analysis show that the alternative scheme based on glass fiber reinforced cable arrangement has better economic benefits while reducing vortex loss.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM75
本文编号：2497921
[Abstract]:Copper and iron consumption will be produced in underground reinforced concrete pipe arrangement when high voltage cable is running. These losses, including the loss of the cable itself, not only waste electricity, but also affect the temperature field distribution of the cable and the arrangement pipe. In order to solve the problem of power waste caused by vortex loss caused by transmission line current in traditional reinforced concrete underground cable pipe arrangement, the finite element numerical analysis technique is applied to the analysis and calculation of vortex temperature field in underground complex environment. A three-dimensional finite element model of vortex-temperature coupling field for underground cable arrangement is proposed, which takes into account the requirements of solving speed and calculation accuracy, and an iterative method for solving multi-physical coupling field. Based on the numerical analysis of the Eddy current field and temperature field of several typical reinforced concrete structure underground cable pipes, the Eddy current distribution of metal components in the underground cable arrangement pipe of typical reinforced concrete structure under different working conditions, the temperature field distribution of the whole field and the cable core temperature under harmonic condition are obtained in this paper. Based on this, the solution of replacing the traditional steel bar with glass fiber reinforcement (Glass Fiber Reinforced Polymer,GFRP) is put forward, and the distribution of temperature field in the replaced cable pipe is calculated by numerical simulation, and the feasibility of the scheme is demonstrated from the technical point of view. In this paper, the technical characteristics and economic performance of two typical cable arrangement pipes based on practical engineering are compared and analyzed. The results of numerical analysis show that the alternative scheme based on glass fiber reinforced cable arrangement has better economic benefits while reducing vortex loss.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM75
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