扩径导线在超高压大容量输电工程中的应用展望

Application Prospect of Extended Diameter Conductor in UHV AC Large Capacity Transmission Projects

介绍了超特高压大容量输电工程中扩径导线的设计原理、研制方法和应用现状。以官兰750kV输变电示范工程应用为例，详细比较了扩径导线与常规导线的电气、机械和环保特性。通过实践应用和对比分析阐明了扩径导线是全面满足电气运行、机械要求和环保标准的输变电工程中的实用经济技术，是建设“环境友好型、资源节约型”电网的重要体现，具有广泛的推广应用前景。

In this paper the design principle, development and current application situation of diameter-extended conductor for UHV AC power transmission projects are presented. Taking 750 kV power transmission demonstration project from Guanting to East Lanzhou for example, the electrical characteristics, mechanical performances of diameter-extended conductor and conventional conductors as well as their environmental protection features are compared in detail. Practical application and comparative analysis results show that as for a developing component for power transmission and distribution the diameter-extended conductor can fully meet the requirements in the aspects of electrical operation and mechanical performance and it can also measure up to the standard of environment protection, meanwhile, it can also bring economic benefits. Application of diameter-extended conductor in UHV AC power transmission project incarnates the guiding principle of construcing environment-friendly and resource-saving power grid, so it possesses wide extension and application prospect.