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中文摘要：
将供电臂划分为3个自耦变压器（AT）区段,建立了全并联AT供电系统的仿真模型,从而得到不同故障下的电流分布,再利用得到的电流计算相应故障下的磁感应强度.计算结果表明：故障点两侧的磁感应强度幅值受故障区段、过渡电阻、故障距离和机车位置的影响较大,有明显区别,而磁感应强度的相角几乎不受影响,差别不大;噪声强度对磁场环境的影响较复杂,当噪声强度大于45 dB时,在不同类型故障发生的情况下,故障点两侧的磁感应强度相角均发生了明显的偏转.
英文摘要：
With the power supply section divided into three AT（AutoTransformer） parts,the simulation model of all-parallel AT power-supply system is built and its current distribution is simulated for different faults,based on which,the corresponding magnetic induction intensity is calculated.Calculated results demonstrate that,the amplitude of magnetic induction intensity at both sides of fault point is obviously affected by the faulty section,transition resistance,fault location and train position,while its angle is hardly affected by these factors;the influence of noise intensity on the magnetic environment is quite complicated,when noise intensity is larger than 45 dB,the angle of magnetic induction intensity at both sides of fault point deflects obviously during different faults.
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