2) DC electric traction system
直流电力牵引系统
1.
For the DC electric traction system of the electrified railway in Hongkong,the power system simulation program EMTP was used to study the lightning overvoltage in the power cables of the DC electric traction system.
针对香港地区的电气化铁路直流电力牵引系统,采用电力系统仿真计算软件EMTP研究直流电力牵引系统中电力电缆上的雷电过电压。
3) DC traction power supply system
直流牵引供电系统
1.
Coordination of line detection with automatic re-closing in DC traction power supply systems
直流牵引供电系统线路检测与自动重合闸的配合
2.
After analyzing several kinds of protection for feeder line in subway DC traction power supply system,it is pointed out in the paper that the phenomena of refusing action and error action can not be avoided with existing protection which can not protect the whole feeder line.
分析了地铁直流牵引供电系统中几种常用的馈线保护类型,发现现有的保护方法很难避免跳闸保护拒动或误动现象的发生,并且不能保护馈线的全长。
3.
The paper gives the examples of failures caused by rail potential and negative return current occurred in operation of Guangzhou subway, illustrates the specialty and importance of rail potential and negative return current in DC traction power supply system after the analysis of causes in detail and proposes some inspection and handling measures to typical failures in operation.
列举了广州地铁在运行中发生的几起与钢轨电位及负回流相关的故障,通过详细的原因分析,说明在直流牵引供电系统中钢轨电位和负回流的特殊性和重要性,并提出了在运行中针对几起典型故障的检查和处理措施。
4) high-voltage DC traction power supply system
高压直流牵引供电系统
1.
After simple introduction of All-Parallel AT Power Supply system, 3 schemes about how to determine the voltage of high-voltage DC traction power supply system were put forward, then the structure of the form of trolley line at different levels of DC voltage was established.
高压直流牵引供电系统可以有效地解决这些问题,成为未来我国铁路发展的研究方向之一。
2.
The paper introduced to the composition of the traction power supply system,and detail how to choose the voltage level from two aspects of the stray current and the isolation switch,preliminary draw a conclusion that the voltage of high-voltage DC traction power supply system was 35 kV.
详细分析了我国直流牵引制和单相工频交流牵引制目前存在的主要问题,提出了用高压直流牵引供电系统集中解决这些问题的构想。
5) DC traction power supply system
直流牵引系统
1.
DC traction power supply system is a special and important part in urban rail transit.
阐述直流牵引供电系统是城市轨道交通供电系统中一个特殊重要的部分,直流牵引系统监控自动化是整个供电系统自动化工程实施的核心。
2.
Safe and reliable operation of DC traction power supply system are the basis of whole urban railway transit system, it is very important to do research work on DC traction power supply system fault analysis, protection and relative problems.
随着我国经济的发展,城市建设规模的不断扩大,许多大中城市轨道交通的规划和建设已提上日程,直流牵引系统的安全可靠运行是整个城市轨道交通安全畅通运行的基础。
补充资料：直流
直流
Direct current
直流(direet。urrent) ，仅按一个方向流过电路或设备的电流称为直流。与交流电压相比，直流电压的极性是不变的。直流电流相当于电荷沿着闭合的电路以不变的方向流动或位移。直流电流和电压的幅值可以恒定，也可以随时间变化。 蓄电池和旋转发电机产生幅值恒定的额定直流电压，整流器产生幅值随时间而变的直流电压。整流器把交流电压变换为脉动的直流电压。 通常电站不是广泛地将直流电输配给一般用户，相反，在需要直流电(d。)能的场所，是把商业上合用的交流电(ac)能整流为直流电能。 「罗布(D.D.Robb)撰]
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条