基于扩展解耦法的AT牵引网钢轨电位分析

Analysis on Rail Potential in AT-fed Traction Power Networks Based on Extended Decoupled Method

为解决AT牵引网的钢轨电位分析问题,本文使用导体合并算法对牵引网进行合并、简化,基于扩展解耦法计算出其他导体对接地回流网络的感应电流,并使用多导体传输线理论计算钢轨电位的分布。该算法可对任意复杂的接地网络进行分析,且存储容量、计算量均较牵引网链式电路模型少。仿真结果表明:该算法与牵引网链式电路模型计算结果相吻合。根据IEC标准62128-1对钢轨电位的安全性进行了评估。

In order to analyze rail potential distribution in AT-fed traction power networks , the system reduc-tion method was used to reduce the system size .Currents induced by Conductors T and F in the grounding re-turn network were calculated with the extended decoupled method . On the basis of the multi-conductor trans-mission line theory , rail potential distribution was derived . The proposed method could be used to any com-plex grounding networks ,and its storage capacity and calculation burden were less than chain circuit model . Simulation shows that the results of the proposed method are consistent with the results of the chain circuit model . Finally , safety of rail potentials was evaluated according to IEC Standard 62128-1 .