高压架空输电线路增容技术现场应用研究
发布时间：2019-01-02 12:02
【摘要】：随着电力需求日益增加,电网密度逐渐增大,新建线路走廊日益紧缺,而且由于规划、建设速度等方面的限制,输电线路的输送能力成为电网发展的瓶颈。因此,必须考虑如何大幅度提高现有输电线路的传输能力,以适应电力增长的需求。这也是节约新建线路数量或者降低新建线路造价的有效手段,其经济、社会效益十分显著。本文系统地分析了输电线路最大载流量的计算模型——热平衡方程,和输电线路温度弧垂模型——状态方程法；在此基础上,系统地研究建立了线路的安全判据和预警体系,为实际线路的静态增容分析提供了理论支持；以广东地区输电线路作为研究对象,进行了实际线路的静态增容分析,考虑了环境温度随季节的变化,分析计算降低导线运行环境温度限额之后,线路最大载流容量的增加情况；考虑了实际风速情况,分析计算提高风速之后,线路最大载流容量的增加情况,以及对提高风速后的线路进行了安全性分析。研究结果表明,静态增容技术可以在不增加输电走廊等额外投资情况下,提高现有线路的输电容量,且保证线路安全运行。这一结果可为实际线路的运行提供参考。
[Abstract]:With the increasing demand for electricity, the density of power network is increasing, the new line corridor is becoming increasingly scarce, and due to planning, construction speed and other constraints, transmission capacity of transmission lines has become the bottleneck of the development of power grid. Therefore, it is necessary to consider how to greatly improve the transmission capacity of existing transmission lines in order to meet the demand of power growth. This is also an effective means to save the number of new lines or reduce the cost of new lines, and its economic and social benefits are very significant. In this paper, the heat balance equation and the temperature sag model of the transmission line, the state equation method, are systematically analyzed. On this basis, the safety criterion and early warning system of the line are systematically studied and established, which provides the theoretical support for the static capacity increase analysis of the actual line. Taking the transmission lines in Guangdong as the research object, the static capacity increase analysis of the actual lines is carried out, and the variation of the environmental temperature with the season is considered, and the calculation and calculation of reducing the environmental temperature limit of the conductor operation are carried out. The increase of the maximum current carrying capacity of the line; Considering the actual wind speed, the increase of the maximum current carrying capacity of the line after the increase of the wind speed is analyzed, and the safety analysis of the line after the increase of the wind speed is carried out. The results show that the static capacity-increasing technology can increase the transmission capacity of the existing lines without increasing the additional investment such as transmission corridors and ensure the safe operation of the lines. This result can provide a reference for the actual operation of the line.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM75
本文编号：2398461
[Abstract]:With the increasing demand for electricity, the density of power network is increasing, the new line corridor is becoming increasingly scarce, and due to planning, construction speed and other constraints, transmission capacity of transmission lines has become the bottleneck of the development of power grid. Therefore, it is necessary to consider how to greatly improve the transmission capacity of existing transmission lines in order to meet the demand of power growth. This is also an effective means to save the number of new lines or reduce the cost of new lines, and its economic and social benefits are very significant. In this paper, the heat balance equation and the temperature sag model of the transmission line, the state equation method, are systematically analyzed. On this basis, the safety criterion and early warning system of the line are systematically studied and established, which provides the theoretical support for the static capacity increase analysis of the actual line. Taking the transmission lines in Guangdong as the research object, the static capacity increase analysis of the actual lines is carried out, and the variation of the environmental temperature with the season is considered, and the calculation and calculation of reducing the environmental temperature limit of the conductor operation are carried out. The increase of the maximum current carrying capacity of the line; Considering the actual wind speed, the increase of the maximum current carrying capacity of the line after the increase of the wind speed is analyzed, and the safety analysis of the line after the increase of the wind speed is carried out. The results show that the static capacity-increasing technology can increase the transmission capacity of the existing lines without increasing the additional investment such as transmission corridors and ensure the safe operation of the lines. This result can provide a reference for the actual operation of the line.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM75
【参考文献】
相关期刊论文 前1条
1 徐青松;季洪献;侯炜;王孟龙;;监测导线温度实现输电线路增容新技术[J];电网技术;2006年S1期
，本文编号：2398461
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