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在不同电压等级同塔多回线路中,可能出现分裂数不同的导体同时存在的情况,为此在线路无线电干扰的计算中,提出了混合法,即在同塔多回线路中,混合应用经验公式法和激发函数法,分别计算导体分裂数小于4和大于等于4线路的干扰场强,再将80%值进行叠加,从而得到合成场强。将混合法应用于南雁220 kV/500 kV同塔四回线路无线电干扰特性分析中,结果表明:混合法能够准确反映线路几何参数、电气参数和排列方式变化所导致的无线电干扰场强值变化的趋势;导体距地最小高度等距离增加,混合法计算结果均匀减小;测量点与杆塔中心线的距离变化时,混合法计算结果的波动比较大。
In the same voltage tower with more than one circuit, there may be split the number of different conductors exist at the same time, for the calculation of line radio interference, hybrid method, that is, in the same tower with multiple circuits, the application of mixed experience The formula method and the excitation function method, respectively calculate the interference field strength of the conductor split number is less than 4 and greater than or equal to 4 lines, and then superimposed 80% value to obtain the resultant field strength. The hybrid method was applied to the analysis of the radio interference characteristics of the four-circuit line in the same tower of Nan Yan 220 kV / 500 kV. The results show that the hybrid method can accurately reflect the variation of the radio disturbance field strength caused by the changes of the line geometrical parameters, electrical parameters and arrangement patterns The trend is that the conductor distance increases equidistantly from the minimum height, and the result of the hybrid method decreases uniformly. When the distance between the measurement point and the centerline of the tower changes, the result of the hybrid method fluctuates more.