But there are few theories and methods for the analysis of the transient characteristics of DC line fault.
然而，目前对直流线路故障暂态特性仍缺乏系统、深入的理论研究。
The circuits of dc-side ripple reduction are based on direct reinjection of the ripple in series with the dc line.
直流侧纹波消除电路是基于直流线路中纹波的直接再注入原理而设计。
The LDC filter is introduced into a rc welding inverter power source and the voltage ripple of the DC line is decreased.
在弧焊逆变电源中采用LD C滤波电路，可以降低直流线上的电压纹波。
The formula of the rectifier's overshoot current of bidirectional 12-pluse DC system when DC line short-circuit fault occurs is derived.
针对双桥十二脉动直流系统，推导了直流线路发生短路故障时的整流器过冲电流公式。
The current controller on the HVDC line can do AC/DC parallel tie-line local control or improve the stability of AC/DC hybrid power systems.
直流功率调制器可以对交直流联络线进行局部控制或改善交直流混合系统的运行特性。
The result indicates the nonlinear variable structure control can adjust the transmission power of DC line effectively, and assure the stability of the AC-DC system.
仿真结果表明，非线性变结构控制可以有效地调节直流线路的传输功率，保证交直流系统的稳定性。
Short-circuit fault model simulation results show that the locomotive starting current is similar to the remote short-circuit current will affect the DC line protection.
短路故障模型的仿真结果表明机车起动电流和远端短路电流的相似会对直流馈线保护造成影响。
The United States currently has just one high-speed line — a 735-kilometer system serving Boston, New York City, and Washington, DC.
美国现在仅有一条高速铁路线——一条服务于波士顿、纽约和华盛顿特区之间的全长735公里的铁路系统。
Renting, particularly along the red line in northwest DC, is expensive.
租金比较昂贵，特别是在特区西北部沿红线地区。
B.R., a reader in Washington, DC who has just returned from a trip to Vietnam, sent us an image with a single line of explanation: "an unregulated telecoms infrastructure".
一位住在华盛顿特区的读者B.R.，最近刚去了一趟越南，他告诉我们有关越南的一个简单直白的印象：杂乱的电信设施。
Both BC and dc are command-line calculators.
bc和dc都是命令行计算器。
The cable monitoring module is connected to the central unit via the sitras pro baplus dc buffer amplifier and is powered by the contact line voltage .
另一个可选控制功能是对基于测得电压接触线电压及测试电流的剩余区间电阻进行计算。
Hope you are now understand why there are two different types of capacitors in the DC supply line.
希望你现在明白为什么有两种不同类型的电容器在直流供电线路。
Therefore, it has great significance to research DC icing test methods on disk-shaped suspension insulator for study of DC transmission line characteristics of external insulation.
因此，对盘形悬式绝缘子直流覆冰试验方法进行研究，对直流覆冰输电线路外绝缘特性的研究具有重大的意义。
The former's major design basis is the parameter of soil resistivity along the pipeline, the crossings of high-voltage DC transmission line with the pipeline etc.
前者的设计依据是沿线土壤的电阻率及输电线路与管道交叉等参数，后者主要是加压站内深井阳极地床。
In DC transmission line construction design, current national standard of economical current density will under predictcd conductor section, resulting in large loss.
在直流输电线路工程设计中，如果按我国现行标准规定的经济电流密度选择导线截面，将导致截面偏小，损耗增大。
A novel new strategy is proposed, in which the filter of the DC fault line at converter station is reserved to enhance the system transient voltage stability under this fault.
提出了一种新的保留故障直流线路处的电容器组的策略，以提高故障下的暂态稳定性。
The detecting circuit of power line touching of the suspension system of DC long-distance reserve power supply of PHS Cell Station was designed by the characteristic of gaseous discharge tube.
利用气体放电管的特性，实现了小灵通基站后备直流远供电源悬浮系统动力线碰触的检测；电路结构简单，实用性强。
The insulation methods of several DC systems are compared and analysed. A ping-pang variable bridge measurement is adopted. The ex - act on line detection of grounding resistance is realized.
比较分析了几种直流系统常用的绝缘检测方法，采用乒乓式变电桥测量法，实现了接地电阻的准确在线测量。
The new line of solenoid valves accepts both ac and DC voltages while improving performance.
电磁阀的新生产线，可同时交流和直流电压，同时提高性能。
Valves available in in-line, sub-base mount, and manifold mount constructions. Available in either AC or DC operated with aluminum bodies. Operating pressures 0-150 psi.
阀门可在网上，子山，和多方面的安装结构。可在任何交流或直流操作与铝体。经营压力0- 150磅。
When the DC waveform tries to drop back toward zero, the line voltage becomes less than the 20 volts the capacitor has been charged to.
当直流波形试图回落到零，线电压小于20伏的电容被充电到。
This paper introduces the working process and control features of the automatic production line of DC battery discharge, and designs an automatic control system of DC battery discharge based on PLC.
介绍了直流电池放电自动化生产线的工作过程与控制特点，设计了一种基于PLC的直流电池放电自动化控制系统。
The objective of this work is to design and realize a monolithic off-line AC/DC SMPS switcher.
本课题任务就是设计一款小功率单片集成的离线式AC/DC转换开关电源。
A kind of PID controller with fuzzy algorithm setting on-line PID parameters automatically was designed and applied in brushless DC motor speed control system.
通过设计一种模糊pid控制器，应用模糊算法在线自动整定PID参数的方法，将其应用于无刷直流电动机调速控制系统。
The DC superposition method was mainly utilized because it was ripe theory about On-line Insulation Monitoring on the XLPE power cable, in addition of the DC partial current method.
本系统电缆绝缘在线监测理论，以比较成熟的直流叠加法为主，加上直流分量法作为理论基础。
The protection of feeder line in DC traction supply system is based on microcomputer, which is used to control and protect the high-speed circuit breakers.
直流牵引供电系统的馈线保护以微处理器为基础，用来完成对直流快速断路器的控制和保护。
The dc voltage is obtained by rectifying and filtering the line voltage, most often by the diode-rectifier circuit.
直流电压通过对工频电压整流和滤波得到。通常是使用二极管整流电路。
The dc voltage is obtained by rectifying and filtering the line voltage, most often by the diode-rectifier circuit.
直流电压通过对工频电压整流和滤波得到。通常是使用二极管整流电路。
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