特高压交流输电工程导线截面及分裂形式研究

为了有效控制线路损耗和电磁环境指标,降低线路造价,选择合理的导线截面及分裂形式,通过分析1 000kV交流输电线路不同分裂形式和不同子导线直径的导线表面电位梯度、导线起晕电压、导线电晕损耗、无线电干扰和可听噪声,比较了各种导线方案的优劣,并研究了高海拔条件对导线起晕电压、导线电晕损耗、无线电干扰和可听噪声的影响,对比了各导线方案对不同海拔地区的适应性。最终结合工程提出了满足电气性能和机械特性要求,适合于我国特高压输电的导线截面及分裂形式,对保证输电系统经济运行和节约工程投资有着重要意义。

Research on Section and Split Way of Conductors for UHVAC Transmission Project

In order to control the corona loss and the interference to the environment from the UHVAC transmission line,to reduce the investment of the line,and to get the rational split way and conductor section,in the paper,the conductor surface potential gradient,conductor critical corona inception voltage,corona loss,radio interference and audible coronal noise of 1000kV AC transmission line under different phase split way and different diameter of conductor section are analyzed.The influence of high altitude on conductor critical corona inception voltage,corona loss,radio interference and audible corona noise is studied,and the adjustability of all the conductor schemes to different altitude is compared.Conductor section and phase split way with good electric performance and mechanical performance that fits UHVAC transmission of electricity in China,are put forward based on power engineering.The conclusion benefits to economical run and investment of 1000kV AC power engineering.