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1)  DC power system
直流供电系统
1.
Analysis of leak current DC power system of opencast mine;
露天矿直流供电系统杂散电流分析
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2)  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。
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3)  DC auxiliary power system
直流辅助供电系统
4)  hybrid AC/ DC power supply system
交直流混合供电系统
1.
The short circuit currents and electromagnetic torque of a hybrid AC/ DC power supply system are analyzed when sudden short circuits occur sim ultaneously at AC and DC sides,and their analytical expressions and calculation results are presented.
重点分析了交直流混合供电系统交流、直流同时发生突然短路时的短路电流及电磁转矩 ,给出了它们的解析表达式和计算结果。
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5)  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。
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6)  DC supplied railway
地铁直流供电系统
补充资料：城市供电系统 power supply system
由城市供电电源，输配电网和电能用户组成的总体。
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