母线跨线间感应电压的计算与分析

Calculation and Analysis of Induction Voltage Between Bus and Line

母线跨线平行安装时,如果母线带电运行,跨线停电检修,由于电磁耦合效应,跨线上将产生一定幅值的感应电压,可能危及检修人员的人身安全。因此,有必要对感应电压的幅值进行计算与分析。研究了不考虑大地影响时,跨线感应电压的分布情况,根据Carson公式及Dubanton公式,考虑大地影响,对跨线感应电压进行了计算分析。结果表明,大地土壤电阻率越大,跨线感应电压幅值越高,大地的影响不应忽略。

Sometimes the bus is installed parallel to the line.When the line is under maintenance while the bus is charged,due to the electromagnetic coupling effect,the line will generate the induced voltage.In this situation the maintenance personnel would be endangered.Therefore,it is necessary to calculate and to analyze the amplitude of the induced voltage.Firstly,the distribution of the induced voltage without considering the influence of the earth is studied.Then,based on the Carson formula and the Dubanton formula,considering the influence of the earth,the induced voltage is calculated and analyzed.The results show that the greater the soil resistivity,the higher the induced voltage.So the influence of the earth should not be ignored.