The problems of frequency modulation were studied,including over modulation and long transition time after line faults.
对某电网两起线路故障后引起电网频率的超调量明显偏大、过渡时间过长而暴露的机组调频方面的问题进行了全面分析,说明了完善DEH机组调频控制功能、改善调节特性对保证供电质量、提高电网调频品质有很大的作用。
Based on the characteristics of line protection of HVDC power transmission, the paper describes the characteristics and disposition principles of DC line fault as well as the action sequence of DC line protection.
针对高压直流输电线路保护的特点,较全面的概述了直流线路故障特征以及直流线路故障的配置原理和直流线路保护动作顺序,比较分析了ABB公司和Siemens公司的行波保护判据,结合天广直流输电工程,采用MATLAB对天广直流输电工程中Siemens公司的行波保护进行仿真分析。
In this paper,the characteristic of the main parameters during the process of the line fault in metallic return operation is discussed and confirmed on RTDS first;then,based on the DC protection system of Tian-Guang,Gao-Zhao and Xing-An HVDC transmission projects,the correlative protection is introduced.
首先从理论上分析了直流输电系统单极金属回线运行方式下发生线路接地故障时各特征量的变化情况,并借助RTDS实时仿真系统进行了验证;接着以此为依据,以天广、高肇、兴安等由德国Siemens公司设计的直流保护系统为例,介绍了针对这一故障设置的相关保护;然后结合运行实例和仿真,分析了这些保护存在的缺陷如线路后备保护配合不当和无法快速、准确地检测金属回线线路故障等,最后还提出了一些改进建议,并讨论了各种方案的优缺点。
Analyzes 35kV line failure in Hanqiao power transformer substation and the cause of 10kV capacitor protecting action.
分析了韩桥变电站由于35kV线路故障,导致10kV电容器保护动作的原因,并根据分析的结果提出了相应的解决办法。
Based on the arithmetic of wave front protection which is used as the main protection of DC line fault in Tian-Guang HVDC transmission system,and combined with the transient recorder and data in DC line fault,the action process of wave front protection is discussed in this paper.
行波保护是天广直流输电系统的线路主保护,首先介绍了行波保护的算法以及根据运行实际情况对其所做的改进,然后根据故障暂态录波和数据分析了行波保护的动作过程,计算结果表明,天广直流保护系统采用的行波保护能够快速准确地检测直流线路故障。
Based on the operation of HVDC projects in China Southern Grid and State Power Grid, DC line fault recovery (forced retard) is analyzed.
结合南方电网公司和国家电网公司直流工程的运行情况,分析了目前直流线路故障再启动功能现状,发现存在正常双极运行时负极再启动功能退出、可重启的故障范围小等问题。
Line is being checked for trouble.
线路故障,正在检修
line fault pulsing telemeter
线路故障脉冲遥测仪
The major work is to check out fault points ASAP when the transmission line is tripped off,so as to less the loss and shorten the trip-off duration.
针对线路发生故障后,降低故障损失、缩短线路故障停运时间的关键是尽快查出故障点。
Analysis and Prevention of the Transformer Fault Caused by the Line Fault
线路故障引起变压器故障的分析及防范
Installing the Wireless Alarm to Find the Line Faults Quickly
加装无线报警器以快速查找线路故障
Faulty line detection by relative energy method for hybrid transmission lines
配网缆-线混合线路故障选线相对能量法
Faulty line selection based on HHT detection for hybrid distribution network
配电网缆-线混合线路故障选线的HHT检测方法
Synthesis Method Research on Fault Locating in High-tension Transmission Line;
高压输电线路故障定位方法综合研究
Research on Fault Location Algorithm for EHV Transmission Lines;
超高压输电线路故障定位算法的研究
RESEARCH AND DEVELOPMENT OF FAULT IN DISTRIBUTE TRANSMIT LINE;
配电网架空线路故障隔离装置的研制
IEEE COMTRADE BASED FAULT LOCATION SYSTEM WITH MULTI-ALGORITHMS FOR TRANSMISSION LINE;
基于多算法的输电线路故障测距系统
The Application of Electronics WorkBench in The Electronic Circuit Breakdown Analysis;
Electronics Workbench在电子线路故障分析中的应用
A Research of Power Line Fault Phase Selection Based on the Morphological Spectrum
基于形态谱的电力线路故障选相研究
There may be a fault on the line.
可能是线路出现了故障。
Starting circuit wiring faulty.
启动电路电线故障。
Railway Power Line Cable Fault Location of High Impedance Instrument for Insulation Parameter
铁路供电线路电缆高阻故障测距研究
A defect in a circuit or wiring caused by imperfect connections, poor insulation, grounding, or shorting.
电路故障由于电线交叉、接地、断路或绝缘失效而造成的电路故障点
Tanner：I think we're having a little trouble with the line, madam.
泰纳：我想我们的线路有点小故障，夫人。