耐热架空导线在重庆市110kV电网改造中的应用研究

Investigation of the Application of the Heat Resistant Overhead Conductors in the Renovation of Chongqing 110 kV Networks

耐热架空导线作为城市电网增容改造中的主要换用线种,在各个地区的电网改造中得到了广泛的应用。重庆城区电网密集,线路走廊宝贵,原有导线受截面限制,载流量不能满足负荷发展需求。耐热导线能显著提高架空输电线路的输电容量,解决输电容量需求大而出线走廊资源有限的问题。本文简单介绍了目前我国耐热架空导线应用现状与技术发展水平。围绕提高重庆110 kV原有输电线路载流量30%以上所进行的增容改造工程,分析了在此增容改造工程中应用耐热导线的可行性,并以重庆110 kV原有输电线路中一条为例,综合分析了此线路改造工程采用耐热导线方案的静态投资和动态经济效益。论证了重庆地区110 kV输电线路增容改造采用耐热导线输电技术能取得较高的经济效益。

The heat resistant overhead conductors are widely used, as the main renewal conductor type for renovation and capacity expansion of urban networks, in the renovation of regional grids. The Chongqing area features dense networks and precious line corridors. The existing lines cannot carry large enough current to meet the requirement for load increase due to limited conductor size. The problem of great demand for large transmission capacity and limited line corridor resources can be solved by using the heat resistant conductors, which can remarkably increase the transmission capacity of overhead conductors. This paper briefly presents the present application and technical level of the heat resistant conductors in China. In terms of the renovation project to raise the ampacity of the existing lines in the the Chongqing area by over 30% , the feasibility of using the heat resistant conductors in this project was analyzed, Furthermore, the authors analyzed the static and dynamic economic benefits that would be gained if one of the 110 kV transmission lines uses the heat resistant conductors. They demonstrated that high economic benefits would be gained if the heat resistant conductors were to be used in the renovation of the ll0kV transmission lines in the Chongqing area.