High running speed, strong traction load current, high running density, high rail leakage resistance lead to steep rail electric potential rise in HSR.
0引言近两年，我国开始大力修建高速客运专线，由于无砟轨道的钢筋混凝土结构取代了由道砟铺垫的道床，钢轨对大地的泄漏电阻大大提高，客运专线列车运行速度高、牵引电流大、短路电流大、行车密度高，从而造成钢轨电位要比既有的电气化铁道高得多，并对旅客及某些电气设备的安全构成威胁。
G sets are useful for producing DC for railway traction motor s, industrial motors and other high-current applications, and were common in many high power D. C. uses (for example, carbon-arc lamp projectors for outdoor theaters) before high-power semiconductors became widely available.
G 集可用於生产区的铁路牵引电机、工业电动机和其他高电流应用程式以及大功率半导体成为广泛可用之前常见於许多高功率特区用途（例如室外剧院的碳弧灯投影仪）。
With many years'development, we have established advanced production and detection lines for direct-current traction electric motors, magnetic segregator and mining electric locomotives.
经过三十多年的发展，我厂现已拥有一条较先进的直流牵引电机，磁力分离器，工矿电机车的生产、检测流水线。
In accordance with equivalent circuit of AT traction power network it obtains the single line double differential equation for test of fault location, proves that that the fault location accuracy on basis of current ratio of up/down line has no relation with AT leakage impedance, up/down line mutual inductance, rail/ground leakage admittance.
根据AT牵引网当量等值电路导出了计入各种因素影响的单线双差比测距式，证明了复线上下行电流比测距原理的测距精度与AT漏抗、上下行互感、轨地泄漏导纳等因素无关。
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。
In order to developing fault testing system in vehicle, the city railcars electromotor parameters should be tested, collected and disposed in real time, so traction/brake power and electromotor moment can be calculated by electrical current, voltage and rotate speed, and so traction/brake trait curve can be protracted.
为了实现城市轨道车辆的随车故障诊断，必须对轨道车辆电机运行时的各项参数进行实时检测，并对检测到的参数数据进行处理，根据牵引电机的电流、电压和转速等参数值计算出在牵引／制动工况下整车的牵引力／制动力及电机力矩的大小，并绘制出各手柄位下的牵引／制动特性曲线。
The welding of end ring of alternating current machine and the conducting bar is the key technology for manufacturing of asynchronous traction motor with high power. China South Locomotive and Rolling Stock Industry Corporation had taken this significative study as a key project for the manufacturing of alternating current machine. According to the welding of end ring of alternating current machine, the welding of copper and copper alloy is described in this paper. Results obtained in this study are as follows. 1.By the comparison of oxyacetylene gas brazing, induction brazing and resistance brazing, it was found that high-quality welding joint could be obtained by induction brazing, which also had the highest efficiency.
交流电机端环与导条的焊接是大功率异步牵引电动机制造的一项关键技术，开展其焊接工艺研究具有重要的意义，中国南车电机公司将此课题作为解决交流电机制造的一个重点项目，本文结合交流电机转子端环焊接的课题，对铜及其合金的焊接进行了研究，主要研究结论如下：1、通过氧乙炔火焰钎焊、感应钎焊、电阻钎焊等焊接方法的对比试验发现感应钎焊可获得优质的焊接接头，且感应钎焊的焊接效率也是最高的。
The interference of the traction current is one of the important subject in the major of railway signal. The use of ballastless track will influence it's condition.
牵引电流干扰是铁路信号专业的一个重要课题，采用无砟轨道之后会给轨道电路抗牵引电流干扰带来一定的影响。
The operating performance of traction transformer station supply is analyzed in detail. Based on the condition of three-phase balance and by using rule sampling computational method, the harmonic sequence current and line current of the high-tension side injected current into power supply system are obtained. By the method of harmonic analysis in the three-phase, nonsymmetrical condition, the transmission efficiency of traction tansformer harmon...
基于三相平衡条件，采用对称分量法计算，得出高压侧输入电力电网系统的谐波分量电流及线电流；论述了在三相不对称情况下的谐波分析方法，分别导出了不装滤波器和装滤波器时，牵引变压器的谐波电流与电力电网系统各相谐波电流的传输关系，得出牵引变电站注入电力电网系统的三相谐波电流计算方法，用以确定在牵引站内是否需要装设滤波器及需要抑制的谐波序次。
Numerous methods of vaginoplasty have been proposed and many are in current use, including peritoneal vaginoplasty, bowel vaginoplasty, amniotic vaginoplasty, vaginoplasty with skin or mucosal tissue graft, and vaginoplasty with a traction wire or device (the Vecchietti's technique).
目前常用的人工阴道成形术有腹膜代阴道成形术、肠管代阴道成形术、羊膜代阴道成形术、皮瓣或黏膜组织移植术、前庭黏膜上提术等。
The ELR of cattle traction is only 24% of the tractor system, and its ESI is 4.25 times that of tractor system, while the Current energy efficiency of cattle traction in plough production is only 3%0 that of tractor impetus, and 1.98% that of horse system in Swedish agricultural system.
相对于拖拉机动力，耕牛产出动力处于较低的能量等级，其环境负载率仅是拖拉机系统的24％，可持续能值指标是拖拉机系统的4.25倍，但有巨大的优化空间和可能。
Based on the wye-delta connection transformer, NPS current caused by traction substation and reactive-power compensation capacity are analyzed when reactive-power compensating devices are implemented in the primary or secondary side of the traction transformer respectively to correct power factor, which provides the theories leading for devising the compensation mode.
以Yd11接线型式的牵引变压器为例，分析比较了分别在牵引变电所一次、二次侧装设无功功率补偿装置校正功率因数时，负序电流及所需无功补偿容量的大小，为补偿方式的改进和优化等提供了理论依据。
The general expressions of negative phase-sequence current in the traction transformer with arbitrary connection are presented. The characteristics of negative phase-sequence in the impedance-matched balance transformer are analyzed. The unbalanced degree of current in primary winding under different load conditions is discussed. The impedance-matched balance transformer is analyzed and compared with the traction transformer with YNd11 connection using the testing data of a traction substation.
三相电压到二相电压间的对称变换可有效减弱负序对电力系统的影响，为此，给出了适用於任意接线牵引变压器的通用负序电流表达式，分析了阻抗匹配平衡变压器的负序特性，讨论了其不同负荷条件下一次侧电流不平衡度，并结合某牵引变电所的一组实测数据将其与YNd11接线牵引变压器进行分析比较，结果表明，阻抗匹配平衡变压器能有效减弱负序电流。
We reached at the international first class at the ultra-high voltage electricity transmission and transformation, direct current transmission and power station projects. TBEA is the first company in China which possessed the 220kV-500kv DC Converter manufacturing technology patent rights, we have the production capability of electric power transformer up to 10000KV, reactor up to 750KV, DC converter up to 500KV, railway traction transformer up to 220KV, rectiformer and other transformers for special usage. The production technologies of 110KV-500KV high voltage cable and 750KV ultra-high voltage large section conduction are in the leading position in china. Our products are wisely used in much national important power transmission, covering in 31provinces, The Three Gorges Project, the West-east Electricity Transportation Project, the West-east Gas Transportation Project, Electrization Railway Project, Guizhou-Guangzhou Double Circle, and The Launch of Divine State 5 Project.
围绕国家中长期发展规划，公司承担了我国十五、十一五一大批代表世界输变电设备最高水平的1000kV特高压交流变压器及电抗器、±500—±800kV直流变压器、750kV变压器及电抗器、750kV-1000kV扩径导线等科研攻关计划，掌握了百万千瓦发电机主变压器，大型水电、火电、核电主机变压器等自主知识产权的核心技术，负责完成了多项国家行业标准的制订，填补了诸多世界领域的空白，为我国的三峡工程、西电东送、1000kV、±800 kV特高压示范工程等国家重大项目工程提供了国产首台产品技术和服务。750kV特高压电抗器、750kV扩径导线及母线荣获中国机械工业特等奖、国家科技进步一等奖。
From Qujing grid electrified railway traction substation transformer structure analysis, and analysis of current and voltage harmonic Railway Traction Power Substation hazards, as well as harmonic suppression measures
本文从 曲靖电网内电气化铁路牵引变电所变压器的结构分析入手，分析铁路牵引变电所谐波电流电压对电网的危害，以及谐波的抑制措施
Precambrian Madiyi Formation in Banbianshan, Taojiang of Hunan Province is consisted of deep-water gravity flow deposits, deep-water traction current deposits and deep-water in situ deposits.
湖南桃江半边山前寒武纪马底驿组为一深水重力流沉积、深水牵引流沉积与深水原地沉积共生组合。
This diagram shows a DC 3-Rail Traction System with the location of current rail in relation to the running rails.
这是一幅供电轨相对于走行轨位置的直流第三轨牵引供电系统图。
Fault locator of all-paralleling AT traction power supply based on the theory of the current ratio of paralleling lines
基于横联线电流比原理的全并联AT牵引网故障测距装置
Discussion on the Protection Mode of Direct Current Traction System with Positive Pole Set Earthed
直流牵引系统正极接地保护方式的探讨
It is a new subject faced to the locomotive overhaul companies that the currently test equipments on traction power rectifier uniform current intensity can't meet the needs of railway developing and it also lack of required compatibility.
目前所采用的牵引整流柜均流试验设备缺乏必要的兼容性，无法满足铁路跨越式发展的需要，给机车检修企业提出了新的课题。