750kV变电站导线场强及电晕噪声分布

为了研究电晕噪声与导线电场强度的关系,对变电站导体电晕控制场强进行了海拔修正,获得了高海拔750kV变电站内导线表面场强限值,建立了750kV变电站四分裂导线模型,使用有限元分析软件计算了导线表面电场分布,进而预测了导线电晕噪声,获得了电晕噪声与距离的分布曲线。与使用噪声频谱测试仪测量的B相中心线—C相直线路径噪声分布的对比结果表明,实测数据与计算数据具有较好的一致性。

Electric Field Strength of Conductor and Distribution of Corona Noise in 750 kV Substation

In order to research the relationship between corona noise and electric field strength of conductor, this paper first performed altitude correction and obtained the threshold of field strength of the conductor surface in 750 kV substation of high altitude area. And then the model of four split conductor was established. The electric field distribution of conductor surface was calculated by using finite element analysis software. Finally, the corona noise of the conductor was predicted, and the distribution curve of corona noise with the change of distance was obtained. The phase B centerline-C phase straight path noise distribution was measured by noise frequency spectrum tester. It shows that the measured data and calculated data has good consistency.