1) DC traction power supply
直流牵引供电
1.
The significance of electrical protection and definite value of DC traction power supply system for metro is illustrated.
阐明地铁直流牵引供电系统电气保护设置与定值的重要性,着重论述地铁电气保护设置的主要原则。
2.
So it is significant to bring it to the DC traction power supply system for urban mass transit.
由于中大功率的电力电子设备在电网中占有很大的比重，因此对高功率因数的三相PWM整流器的研究己成为当今国内外研究的一大热点，如能将之应用在城市轨道交通直流牵引供电电源系统中将有着重大的现实意义。
3.
DC traction power supply system is an important part of the urban rail transit power supply system, the multi-pulse rectifier currently as the core technology of which has drawn greater attention, while the three-phase PWM rectifier with its superior performance, its application in DC traction power supply system newly become the hotspot for study of the scholars at home and abroad.
直流牵引供电系统是城市轨道交通供电系统的重要组成部分,多脉波整流作为目前直流牵引供电系统的核心技术倍受关注,而三相电压型PWM整流器以其优越的性能,在城市轨道交通直流牵引供电中的应用也成为新近国内外广大学者研究的热点。
2) D.C. traction power supply network
直流牵引供电网
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) traction DC cable
牵引直流电缆
6) direct current traction substation
直流牵引变电所
1.
The reasons why reverse current protection is not necessary in rectifiers of direct current traction substation are described.
通过分析,阐述了直流牵引变电所内的整流器不必设置逆流保护的理由。
补充资料：电力牵引CC供电方式
电力牵引CC供电方式
coaxial cable supply system for electric traction
d一anl.q一anytn CC gongd一an fongsh-电力牵引CC供电方式(eoaxial。able supplysystem for eleetrie traetion)电力牵引的一种供电方式，又称同轴电缆供电方式.同轴电缆是一种具有同轴心的内、外两层导体，内、外导体之间和外导体外部均包有绝缘层的特殊电缆(见图1).同轴电缆可沿铁路埋设，也可架空悬挂在接触网支柱上，每隔5~10 km为一个分区，其内导体作为馈电线，与接触导线相连接，外导体作为回流线与钢轨相连接(见图2)，在有机车运行的分区内，电流从接触导线两端流人机车，而在电派侧的其他分区内，绝大部分负荷电流将流经同轴电缆.当同轴电缆内外导体电流相等、方向相反时，其外部磁场几乎等于零，对通信线路的感应影响很小.此外，CC供电方式的牵引网电压损失和电能损耗很小，供电质全优良.但电缆的单位截面允许载流量远低于架空裸导线，加之接触导线的载流能力又得不到内部导体(多股栩纹线)内脱，交联.命》外部导体(钥线)外部绝缘‘狡乙场下防护层图1同轴电缆结构示意图┌──┬──┬───┐│ │_点 │ │├──┼──┼───┤│l了 │Ll一│〔下一│└──┴──┴───┘接触导线钢勒同轴电绳 图2同轴电缆供电系统原理接线图充分利用，致使CC供电方式对铜材的消耗量很大，造价很高。因此，该供电方式一般只用于局部特别困难地区.日本东海道新干线的洪松盯一大畸间(6 km)和东北新干线的上野一新田端间(2 .4 km)，以及中国神头电厂的电气化专用线上(4 km)都曾采用过这种方式。
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