• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Down to Earth Conference >Earthing and Negative Return Systems in the Melbourne DC Railway
【24h】

Earthing and Negative Return Systems in the Melbourne DC Railway

机译：墨尔本特区铁路的接地和负返回系统

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Melbourne metropolitan passenger railway system uses a 1,500 V DC overhead contact line traction power system to power the rolling stock. The running rails are used as conductors for the return current path. As there is a finite resistance between the running rails and the earth, a portion of the current will flow through earth and metallic buried structures back to the substation source. The rails are intentionally insulated from earth to mitigate return current leaving the rails as stray currents and causing stray current corrosion of underground metallic services. The adverse effect of increasing rail to earth resistance is elevation of rail potentials which may exceed allowable levels, thus creating a hazard to passengers, persons working on the railway and the general public. Therefore the design objectives for the negative system are to meet the conflicting requirements of stray current mitigation and reduction of rail to earth voltages. This paper details the negative return system employed in the Melbourne railway system and the parameters which need to be considered in its design, construction and maintenance.
机译：墨尔本都市客运铁路系统使用1,500 V DC架空接触线牵引电力系统为机车车辆供电。滑轨用作返回电流路径的导体。由于滑轨和地面之间存在有限的电阻，因此一部分电流将流过地面和金属掩埋结构，回到变电站电源。故意将铁轨与大地绝缘，以减轻作为杂散电流离开铁轨的回流电流，并引起地下金属服务的杂散电流腐蚀。增大铁路接地电阻的不利影响是可能会超出允许的水平，从而对乘客，在铁路上工作的人员和公众造成危害。因此，负极系统的设计目标是要满足减少杂散电流和降低轨对地电压的矛盾要求。本文详细介绍了墨尔本铁路系统中使用的负收益系统以及在其设计，建造和维护中需要考虑的参数。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号