大开距巨型间隔棒与双柱悬索拉线塔的配合应用

Combined Application of Large Open Distance Spacer and Double Column Suspended Guyed Tower

介绍了巴西全长953 km的500 k V巴拉那伊巴输电项目(连接巴黑拉斯、母马河、路易斯安娜和皮拉波拉4个变电站)的实际配置情况。重点论证为满足该线路高输送容量的系统要求,采用大开距巨型间隔棒的分裂组合导线与双柱悬索拉线塔配合应用的技术,即利用各相间压缩距离和组合导线大开距分裂的平衡布置,以使导体表面电场均匀分布。并通过两个组合降低线路阻抗,最终满足500 k V单回线路长期输送1 670 MW以上容量的要求。

The actual configuration of 500 k V Paranaiba transmission project in Brazil（953 km,which connects Baheilasi,Mama River,Louisiana and Piraora substations） is introduced in this paper.It is mainly demonstrated that in order to meet the system requirements of the high transmission capacity of the line,the technology of combined application of split combined conductor with large open spacer and double column suspended guyed tower is applied.The balanced arrangement of the compression distance for each phase and the large open distance splitting of composite wire is used to provide a uniform distribution of the electric field on the surface of a conductor and reduce line resistance.By this balanced arrangement,a 500 k V transmission line is able to have a long-term surge impedance loading（SIL） of 1 670 MW which remarkable technical and economic benefits can be achieved.