1)grounding distance protection接地距离保护
1.The schemes of adaptive grounding distance protection and zero sequence current protection were proposed,which are suitable to all kinds of operation modes of power grid and have better protection function in all kinds of grounded faults.首先从电力电缆的正序、负序、零序阻抗特性及零序阻抗与零序电流的关系,分析了电力电缆同架空线的不同之处;然后在传统保护的基础上提出了自适应接地距离保护和零序电流保护方案。
2.Zero sequence compensation of grounding distance protection and its different manifestations are discussed.讨论了接地距离保护零序补偿及其不同表现形式。
英文短句/例句
1.Setting Calculation of Ground Distance Protection for 750 kV Double Circuit Lines on the Same Tower750kV同塔双回线接地距离保护整定计算
2.Zero-sequence mutual inductance on the ground distance elements impact analysis零序互感对线路接地距离保护的影响分析
3.Selection of Zero-sequence Compensation Coefficient for Grounding-fault Distance Protection of 220 kV Feeders220kV馈供线路接地距离保护零序补偿系数选择
4.Adaptive Ground Distance Protection and Its Application on the Lines Connecting Wind Farms自适应接地距离保护及其在风电场联络线上的应用
5.Ground-fault Distance Protection Adopting Adaptive Control to Eliminate the Affection of Transition Resistance接地距离保护采用自适应控制消除过渡电阻的影响
6.Influence of mutual inductance to the distance protection of quadruple-lines on the single tower and the solution同塔四回线线间互感对接地距离保护的影响及对策
7.Compensation algorithm of grounding distance protection considering FCL and fault resistance计及故障限流器和故障过渡电阻的接地距离保护补偿算法
8.In order to improve measuring accuracy of the earth-fault distance protection of series compensated line a new method which employs the reactive compensation factor is presented in this paper.本文针对串联补偿线路接地距离保护,提出了一种新的电抗补偿系数方法。
9.protection in remote control system远距离控制系统保护
10.overreach distance protection equipment过范围距离保护装置
11.blocking distance protection equipment闭锁式距离保护装置
12.integrated circuit distance relay device集成电路距离保护装置
13.Study on Power Line Fault Location and Protection Based on Single-end Transient Traveling Wave;基于单端暂态行波的接地故障测距与保护研究
14.Research of the Microcomputer Distance Protection in Single Source and Short Distance Transmission Line;单电源短距离输电线微机距离保护装置的研制
15.Transmission Line Fault Location and Protection Based on the Gap Between Zero Mode and Aerial Mode Traveling Wave Propagation Time基于模量行波传输时间差的线路接地故障测距与保护
16.The Research on Reliable Coefficient and the Least Protection Zone of Distance Protection Ⅰ;距离保护可靠系数及Ⅰ段最小保护范围的研究
17.Research on Non-linear Distance Protection Principle Based on Traveling Wave Fault Location行波测距式非线性距离保护原理的研究
18.continuous curve distance time protection平滑时限特性距离保护装置
相关短句/例句
ground distance protection接地距离保护
1.Influence on ground distance protection due to the composite impedances;复合阻抗对接地距离保护的影响
2.It’s evident that the fixed ZSCC adopted in the conventional setting method is unable to guarantee ground distance protection obtain higher sensitivity under double lines normal operation mode and better selectivity under single line operation mode.分析了同塔双回线运行方式与零序补偿系数的关系,指出目前整定计算中采用固定零序补偿系数难以兼顾接地距离保护在750kV同塔双回线正常运行方式下具有较高的灵敏性,同时在单回线挂检方式下又具有较好的选择性。
3)earth fault distance protection接地距离保护
1.This paper analysis theoretically the influence of the gap disruptive flashover of insulated groundwire on distance relay, and performance of several usual earth fault distance protections have been extensively tested by using ATP.首先从理论上分析了绝缘地线间隙放电对距离保护的影响 ,并且用ATP对几种常见的接地距离保护进行了充分的数字仿真 ,最后得出接地距离保护在地线分段带间隙的线路上宜按所有间隙都击穿情况下的阻抗参数进行整
4)ground distance relays接地距离继电保护装置
5)three zone, phase and ground relay三段式相间和接地距离保护
6)Protective distance保护距离
1.This article analyses the imagery theory of barrage jamming on SAR,introduces the concept of protective distance and builds an arithm.分析了SAR雷达压制干扰的成像原理,引用了保护距离的概念,建立压制干扰的数学模型,进行了参数的选择,并对SAR的干扰效果进行了计算机仿真,通过结果的输出,验证了通过保护距离进行压制干扰效果定量评估方法的正确性和可行性。
延伸阅读
电力系统中性点接地变压器接地电力系统中性点接地变压器接地earthing transformer for neutral grounding d旧n]一x .tong之hongx旧gd一onj旧d一b旧nyoq一j旧d-电力系统中性点接地变压器接地(earthingtransformer for neutral grounding)电力系统中利用接地变压器获得中性点与大地连接,也称中性点辅助变压器接地。当系统中的变压器不具备接人电阻器或接地故障消除器的条件(例如变压器三相绕组为△接线或虽为Y接线但容量不符合要求)时,要利用辅助的变压器提供一个用于接地的中性点。这种变压器应具备零序阻抗低、激磁阻抗大、功率损耗小的特性。绕组为曲折(Z)接线的变压器符合要求,如图1(a)所示。它可以带二次侧绕组,也可以只有一次侧绕组。 这种变压器每相由匝数相等的两个串联分绕组组成,每个磁芯上的两个分绕组间以及它们对二次侧绕组的零序互磁为零。很明显,这种变压器的零序电抗XTo只为变压器一次侧绕组的漏电抗Xs,,即XTo-Xs;,而系统中性点与地之间的计算阻抗Z。为Z。一25,+Z。,其中Z。为中性点电阻器或电抗器的阻抗。见图1(b)。2.为激磁阻抗。见图2,YN,d接线的变压器二次侧绕组可以带一定负荷。从过负荷能力考虑已经知道.接YN,d接线的双绕组变压器中性点的接地设备的容t不应超过变压器额定容t的50%.由此可认为,当变压器额定容t按中性点接地设备的容t设计时,允许二次侧绕组带50%额定容t的负荷. 还有一种特殊接线的接地变压器和接地设备的组合,是1918年鲍赫(R.Bauch)发明的,故也称饱鹅变压器,见图3。变压器一次侧中性点直接接地,开口三角形接线的二次侧连接接地设备,这与一次侧中性点接有接地设备是等效的。单相接地时,不对称的电压可分解为对称的正序和零序,磁通也可分解为对应的分量。磁通人m、人。、人.需要极小的激磁电流,并对应于正序电压U.。、U、。、U。。,零序电压UO.对各相是一样的,故三个磁柱中有相同的磁通式,对零序磁通来说,变压器相当一个单相变压器,只不过分裂为3个磁柱和3个绕组,见图3(c)。单相接地时,这种变压器每个分绕组上的电压为少尹z‘一.哟.!|||一下咖l!补丰气l一!{屯犷!{屯享!孟=zl息)一刃川l|拍--l--﹄·图1绕组为曲折(Z)接线的变压器 (a)接线图.(b)零序阻抗图会‘价“相“压,·““”的““是中”点接地“备电流的1/3,即夸。因而变压器的额定功率为3x2‘会‘争即中性点接地设备“率”1.15倍。