基于GIM的高压架空输电线路杆塔等效模型构建

Construction of Equivalent Model of High Voltage Overhead Transmission Line Tower Based on GIM

为确保构建的杆塔等效模型与输电工程实际具有较高的适配度,引进GIM技术,设计一种针对高压架空输电线路塔杆等效模型的全新构建方法。结合高压输电所在区域的实际条件,获取场地多源渠道数据,设计三维建模场景;利用GIM技术建立针对高压架空输电线路杆塔的空间结构模型,以此为依据对等效模型中的各个节点进行拼接设计;根据输电线路塔杆平行导体理论,明确导体之间存在互感效应,补偿并修正杆塔等效模型波阻抗系数,完成杆塔等效模型的构建。通过实践证明,设计的模型在实际应用中具有可行性,可实现对电网不同作业条件与作业环境的模拟,从而掌握雷击条件下杆塔不同接地段的过电压变化趋势。

In order to ensure that the tower equivalent model built has a high degree of adaptation to the actual power transmission project,GIM technology is introduced to design a new construction method for the tower equivalent model of high-voltage overhead transmission lines.Combined with the actual conditions of the high-voltage transmission area,the multi-source channel data of the site was obtained,and the three-dimensional modeling scene was designed.The spatial structure model of the pole tower of the high-voltage overhead transmission line is established by GIM technology,and the splicing design of each node in the equivalent model is carried out on this basis.According to the theory of parallel conductors of transmission line towers,it is clear that there is a mutual inductance effect between conductors,compensates and corrects the wave impedance coefficient of the equivalent model of the tower,and completes the construction of the equivalent model of the tower.Through practice,it is proved that the designed model is feasible in practical application,which can simulate different operating conditions and operating environments of the power grid,so as to grasp the overvoltage change trend of different grounding sections of the pole tower under lightning strike conditions.