1) one false Over-voltage of Arc Light Earthing
单相弧光接地
2) arc grounding
弧光接地
1.
Based on the simulation analysis of arc grounding test at kaifeng east substation and recording data of arc over-voltage on site from Hebei Sinewave Electrical Co.
通过对河南开封东郊变电站模拟弧光接地试验的分析及对河北正弦波电气公司弧光过电压记录数据的分析,认为变电站频繁发生一次设备爆炸的原因是由于暂态过程中避雷器和消弧线圈没有起到抑制弧光过电压的作用。
2.
It has high accuracy of line selection and can effectively restrict the arc grounding overvoltage and improve the reliability and continuity of enterprise s power supply systems.
提出了在大型铜冶炼厂中压系统采用一种新型的接地方式——与专用选线技术相配合的消弧及过电压保护装置接地系统,它可有效限制弧光接地过电压,选线准确率高,可提高企业供电系统的可靠性和连续性。
3.
With the increase of solid insulation power cables in electric-network year after year, the accidents such as exploding of power cable and arrester caused by arc grounding overvoltage often happen.
随着矿区电网中固体绝缘电缆逐年增多,由弧光接地过电压引起的电缆放炮、避雷器爆炸事故不断发生,消弧及过电压保护装置的使用有效地防止了弧光接地过电压及其对固体绝缘设备的危害。
3) single phase intermittent electric arc grounding
单相间歇性电弧接地
1.
In the electric power system with the neutral point ungrounded or grounded through the arc suppression coil,the single phase intermittent electric arc grounding can sometimes induce short circuit between the phases.
在中性点不接地(绝缘)和消弧线圈接地电力系统中,单相间歇性电弧接地有时会引发相间短路,过去将这类事故原因大多归结为绝缘弱或单相间歇性电弧接地过电压高。
4) Single-phase grounding
单相接地
1.
The treatment method of single-phase grounding failure in small current grounding system;
小电流接地系统单相接地故障的处理
2.
Research on the effect of single-phase grounding fault on line losses;
电力系统单相接地故障对线损影响的研究
3.
Analysis of single-phase grounding mechanism in small current grounding system;
小电流接地系统单相接地机理分析
5) single phase grounding
单相接地
1.
Combining particularity of production and its power system in mine, all kinds of single phase grounding over voltage were analyzed specially, and their harmfulness was discussed, so that the precautionary measures and the protective measures were taken, and safety in operation of mine power system was ensured.
结合矿井生产及其供电系统的特殊性 ,对矿井电网单相接地时可能发生的各种过电压进行了专门的分析 ,并对其产生的危害性进行了讨论 ,以便采取预防和保护措施 ,确保矿井供电系统的安全运
2.
After calculation,neutral grounding through 35 Ω resistance with single phase grounding protection was chosen for the 6 kV HV auxiliary power system.
蒲圻电厂规划容量1200MW,在选择高压厂用电系统接地方式时,计算容量最大的厂用变所连接供电网络的单相接地电容电流,电流偏高,不能采取不接地方式。
3.
In order to solve the problem ot single phase grounding fault locating in non-effectively grounding networks, a zero-sequence voltage based practical method of locating and isolating for single phase grounding fault section is proposed in this paper, which operates on the feeder automation system of voltage-time type.
为解决小电流接地系统单相接地故障定位困难的问题,介绍了一种在电压时间型馈线自动化系统中基于零序电压检测的馈线单相接地故障区段定位与隔离方法,阐述了该方法的工作原理和馈线终端单元(FTU)的运行方式。
6) single-phase earth
单相接地
1.
Research on Dealing with Single-phase Earth Fault Based on Feeder Automation;
基于馈线自动化的单相接地故障处理研究
2.
This article in analyzes the coal mine 6kV system single-phase earth(leakage) to protect the principle in the foundation,introduced when with emphasis the coal mine 6kV power supply system earth experiment zero foreword electric current and zero foreword power resemble-angle survey and survey conclusion.
在分析煤矿6 kV系统单相接地(漏电)保护原理的基础上,重点介绍了煤矿6 kV供电系统单相接地试验时零序电流及零序功率相位角的测量和测量结论。
3.
This paper analyses the fault characteristics when a single-phase earth fault happened in distribution system.
分析了配电系统发生单相接地时的故障特征,在研究了现有选线方法的基础上,提出了利用小波变换的奇异性检测理论进行故障选线的新方法。
补充资料：电力系统弧光接地过电压
电力系统弧光接地过电压
arcing ground overvolt-age in electrical power system
d一onll xl士ong huguong}led一guod一onya电力系统弧光接地过电压(arcing groundovervoltage in eleetrieal power system)中性点不直接接地系统中一相接地将使另两相对地电容通过电源电感再充电而产生的过电压。接地电弧熄灭后，它们多余的电荷将通过电源电感对原故障相对地电容释放、再加上该相的电源电压，在其上产生恢复电压。上述过程如在不利条件下多次重复，三相对地及中性点位移电压均可能较高。由于随机的影响因素多，即使按简化的集中参数等值回路，一些重要参t的计算仍过于繁难，过去的一些理论分析，在电弧嫩、熄灭时刻的选择，中性点位移与恢复电压的关系诸方面.均有一些牵强的假定，其实用意义较小.根据实测及近来的研究，有关的结论是:①如原故障相绝缘强度只是瞬刻下降，其恢复电压与两正常相对地过电压相近;②以10kV系统为例，实测到的最大过电压为4.3倍相电压，对非弱绝缘无危险，③如熄弧时无截流，则相间与相对地过电压基本持平。 以往的研究工作对接地电流重视不够，原则上它应有:中性点电压突变及两正常相对地电容再充电的过渡过程所决定的电流;故障相对地电容原有电荷的释放及稳态的工频接地电流等分量。在中性点绝缘以及经消弧线圈接地的系统第一次接地时.实测到的短路电流脉冲的峰值均有数百安之多(可以想见，如电弧重燃、则电流值将更大)，如接地点靠近变电所母线，则此持续时间虽短，但较强烈的电弧即可能波及到邻相，造成烧母线间隔的重大事故。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条