零序电压保护,zero sequence voltage protection
1)zero sequence voltage protection零序电压保护
英文短句/例句
1.Analyze of Zero Sequence Voltage Protection Scheme for Shunt Capacitor Bank并联电容器零序电压保护的改进方法分析
2.Zero-Sequence Current Protection Setting Caculation of Line for High-Voltage Power System;高压输电线路零序电流保护的整定计算研究
3.Improvement on Stator Ground Protection Based on Zero-sequence Overvoltage for Large Generator大型发电机零序过电压定子接地保护的改进
4.o8L6UifK}[email protected] K8N/QD?t~N/GD5F_w[[email protected]零序电哩向保护装置
5.Probe into Proofreading Method of Polarity of Transformer Zero-sequence Differential Protection Current Transformer变压器零序差动保护电流互感器极性校对方法探讨
6.Cause of Malfunction of Grounding Transformer Zero-sequence Current Protection in 10kV Low Resistance Grounding System10kV小电阻接地系统接地变压器零序保护误动原因分析
7.Research on inverse time current relay based on the absolute value of zero-sequence power采用零序功率绝对值构成反时限零序电流保护的方案探讨
8.Analysis of A Water Feeding Pump Motor Zero Sequence Protection Malfunctioning Accident一起电厂给水泵电机零序保护事故的分析
9.Adaptive Zero-Sequence Trip Protection in Ground Neutral System大电流接地系统中自适应零序速断保护
10.Analysis and disposal of an incident of primary transformer zero-sequence overvoltage protection misoperation一次主变间隙零序过压保护误动原因分析及处理
11.The Influence of Temperature Characteristic of Zero-phase Current Transformer on Capability of Leakage Protective Plugs;零序电流互感器温度特性对漏电保护插头性能的影响
12.overvoltage protection varistor过电压保护压敏电阻器
13.Abstract: Zero sequence directional power protection is widely used in neutral directly grounded system.文摘:在大电流接地系统中广泛采用着零序功率方向保护。
14.The Improvement And Application of Medium And Small Size Generator Neutral-differential Current Stator Ground Fault Protection中小型发电机零序差流定子接地保护的改进及应用
15.Research of Effects on Transformer Protection by Harmonics and Negative Sequence of Electric Railway电铁谐波和负序对变压器保护影响的研究
16.Protective system for ground connection wire industrial and civil buildings;工业与民用建筑低压用电工程的接地、接零保护系统
17.With Generators,Boost Inter-turn from the Protection of the Reasons for Analysis and Action一起发电机零起升压匝间保护动作原因分析及处理
18.Analysis of zero-sequence protection resist-operation in 110kV line一起110kV线路零序保护拒动分析
相关短句/例句
Adaptive zero-sequence overvoltage自适应零序过电压保护
3)zero-sequence over-voltage protection零序过压保护
4)zero sequence current protection零序电流保护
1.Calculating coverage ofzero sequence current protection based on node impedance matrix;一种基于节点阻抗矩阵快速求取零序电流保护高段保护范围的新方法
2.The grounding current value,fault current feature of the small resistance grounding system and ranges ofzero sequence current protection when grounding transformer is connected to different position are analyzed.介绍了小电阻接地系统的接地变压器接于不同位置时的接地电流值和故障电流的特征,分析了零序电流保护范围的不同。
3.If the constant zero sequence impedance is used to set the current, thezero sequence current protection can not operate correctly.电力电缆的零序阻抗随零序电流的大小而改变,如果采用恒定值的零序阻抗来进行零序电流保护的整定,容易导致保护的不正确动作。
5)zero sequence protection零序电流保护
6)zero-sequence current protection零序电流保护
1.Analysis of malfunction of grounding transformer szero-sequence current protection in 10 kV low resistance grounding system;10kV小电阻接地系统接地变压器零序电流保护误动分析
2.Thezero-sequence current protection is an important means of power system ground protection.零序电流保护是一种重要的接地保护方法。
3.The line protection scheme withzero-sequence current protection and distance protection as the main protection is proposed for the radial system with a single power source during the initial stage of black-start.针对电力系统黑启动过程的特殊要求,提出了其继电保护配置的基本原则;研究了适用于黑启动初期单电源运行方式下以零序电流保护和距离保护为主的线路保护配置方案;在分析不同运行方式下零序故障电流特点的基础上,研究并提出了零序电流保护的整定方法。
延伸阅读
交流电气化铁路的负序电流和负序电压交流电气化铁路的负序电流和负序电压the negative sequence current and voltage produced by AC elec-tric railway处为最大，随着负序电流逐渐分散进人电力系统，系统各处的负序电压水平将逐渐下降。YN，d一l:v.v:单相平衡接线11:重臂负荷I]l=轻价负荷月=111/11两，负荷功率因教相同0。250。5751。0图2不同接线牵引变电所的负序电流系数允许标准不同类型发电机的负序承受能力不同，为此，首先应根据有关电机制造标准，选择允许的负序标准。在缺少电机制造标准规定时，可参照以下规定:当汽轮发电机在额定工况连续运行时，三相电流差不应超过10%，水轮发电机三相电流差不应超过20%;有关电力系统公共连接点的三相电压不平衡度，中国国家标准规定:“正常的电压不平衡度允许值为2%，短时不得超过4%”。改善措施主要有:(1)对电气化铁路各牵引变电所实行进线相序轮换，减少电气化区段的综合负序。(2)采用平衡接线变压器，常用的接线型式有斯科特、列布兰、变形伍德布里奇等方式。(3)在受负序电流影响最大的电力系统分支回路中加装电抗器，以限制进人该支路的负序电流。i旧01一u dlanqihua tielu de fuxud一anl旧he fuxud一onya交流电气化铁路的负序电流和负序电压(thenegative Sequenee eurrent and voltage produeedby AC eleetrie railway)交流电气化铁路的单相牵引负荷会造成电力牵引变电所一次侧三相负荷电流不平衡，任一三相不平衡系统均可用对称分量法分解成正序、负序和零序三组对称分t的盈加，从而在电力系统中产生负序电流和负序电压.接人电力系统线电压间的单相负荷不产生零序分量，只有正序和负序分t。负序电流、负序电压的有害影响有:(l)可在同步发电机转子中产生附加损耗和局部发热，造成系统出力下降，(2)负序电流产生的负序转矩，使发电机振动，影响安全运行;(3)增大系统中各翰电环节的损耗;(4)负序电压的存在对系统中三相电动机用户产生不利影响，造成电动机三相电流不对称和附加损耗，使出力下降并危及电动机安全。牵引变电所的负序电流电力牵引变电所负序电流取决于两供电臂负荷的相位和幅值，因此可以把牵引变电所看作是一个负序电流源.图1示出变压器为YN，dll接线的三相牵引变电所在两份用电功率因数相同时的负序电流相盆图.图1的上方为臂电流和变压器二次绕组的三相电流相量;中间为正序电流相量;下方为负序电流相t.不同供电臂产生的负序电流有1200相位差。
