接触网交流在线防冰与离线融冰原理研究

建立了牵引供电网络交流防冰与融冰回路的简化模型,依据该模型分析了接触网交流防冰与融冰的原理理论,比较研究了电阻器限流模式与电抗器限流模式的防冰与融冰方案,提出通过控制限流电阻器的阻值,促使整个防冰与融冰回路的阻抗发生变化,改变防冰与融冰电流的大小,产生焦耳热防止接触网覆冰或融化覆冰,实现在线防冰与离线融冰功能。

The simplified model of traction supply network is built to analyze AC anti-icing and de-icing principle of overhead contact line.After that,two anti-icing and de-icing schemes are compared and studied,which respectively use resistor and reactor to limit loop current.By adjusting the resistance of current-limiting resistor,the total impedance of whole anti-icing and de-icing loop changes and the related loop current changes.The loop current produces wanted Joule heat to anti-ice or de-ice the overhead contact line.