随着电力电子技术的飞速发展，非线性装置被广泛应用于电力牵引系统，这就不可避免地引发了谐波危害问题。
With rapid development of electric power and electron technique, nonlinear equipments are applied in power drawing system widely, which will cause harmonic harm question inevitably.
本文依据矢量控制的基本原理，针对电力牵引系统对电机控制性能的要求，设计了基于转子磁场定向的矢量控制交流调速系统。
In this paper a vector controlled ac speed-regulating system is developed, which adopts the rotor flux field-orientated theory to meet the requirements for an electric traction system.
通过无线感应，该系统还为电梯内部的照明以及电子产品提供电力，无需再使用物理牵引缆线。
This system can also deliver power to the car's internal lighting and electronics through wireless induction, so no physical tether is needed.
研究了无速度传感器控制技术在大功率电力牵引传动系统中应用问题。
The problems concerning speed sensorless control in high-power electric traction drives was studied.
给出了该变压器在相坐标下的节点导纳矩阵，以便同电力系统和牵引网接口进行有关分析。
The nodal admittance matrix in phase coordinates of the transformer is obtained, which can be conveniently used to interface with power systems and traction networks in related analyses.
大功率GTO逆变器用于铁路电力牵引，其PW M控制与一般工业领域中的变频调速系统的PWM控制有很大不同。
High power GTO inverter is used for railway electric traction. Its PWM control is significantly different from variable frequency drive system in conventional industrial area.
通过分析发现电力机车空载启动和牵引变空载合闸都会在系统变压器中造成和应涌流。
The sympathetic inrush may occur in the system transformer when no-load electric locomotive or traction transformer is switched, so the protection may be affected.
电气化铁道牵引负荷是大宗的工业用电部门，因此它是电力系统重要的电能污染源。
Electrified railway's traction load is usually the big consumer for the electric power system, so electrified railway's traction load is the main power quality pollution source.
电力牵引负荷在电力系统中的分布计算宜采用三相分析法。
The three-phase analysis method should be applied for the distribution calculation of electrical traction load in the electrical system.
电力牵引供电系统担负着向电力机车不间断供电任务，乃是电力系统与用户间的桥梁。
The electric traction power supply system is shouldering the duty of uninterrupted power supply to the electric locomotive, it is the bridge between the electrical power system and users.
最后，通过对牵引供电系统异相电弧短路和电力机车运行过程的仿真，验证了保护方案的正确性，有效性和可行性。
At last, the accuracy, efficiency and feasibility are indicated by analyzing the simulation datum of the arc wrong-phase short circuit and the running of the electric locomotive.
无功、负序和谐波的不良影响需要在电力系统进行评估，在牵引供电系统中采取技术措施以期综合解决。
The harmful effects brought by reactive power, harmonics and negative sequence usually be evaluated on some sensitive power system nodes and be comprehensive solved in the traction power system.
介绍HXD1型大功率交流电力机车用SIBAS32控制系统、TCN列车通讯网络及其CCU控制软件的结构，分析机车网侧部件控制、自动过分相控制、操作逻辑控制、牵引/制动控制等功能，给出了机车故障诊断和调试的方法。
Presented in this paper are the structure of SIBAS32 control system, TCN train communication network and its CCU control soft of type HXD1 high-power AC electric locomotive.
阐述了电力线路张力放线自制牵引机设计中与进口设备完全不同的一种新型液压驱动设计方案，该方案使电力线路张力放线液压系统元件国产化得以实现。
The design of a new type of hydraulic system was introduced, which was totally different from the imports. And the localization of this system has been realized.
针对以电机牵引以及驱动系统的调速问题，长久以来一直是电力电子学科中的重要课题。
How to change the motor speed according to different load is a very important study subject in power electronics.
牵引变压器是连接牵引供电系统和电力系统的核心设备。
The traction transformer is the core equipment that was connected traction power supply system and power system.
牵引变压器是连接牵引供电系统和电力系统的核心设备。
The traction transformer is the core equipment that was connected traction power supply system and power system.
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