1) sequence component
序分量
1.
Based on the definition of three-phase imbalance degree,it calculates the positive and negative sequence components from AC sampling values and the ratio of their root mean squares to obtain the three-phase imbalance degree tested.
系统的算法实现主要采用三相不平衡度的定义,通过交流采样值分别求出正序分量和负序分量的采样值,正序分量和负序分量的均方根值的比值便是三相不平衡度。
2.
With this algorithm, the three-phase load is resolved into positive/negative sequence power and coupling power, thus, decoupling three phase power flow into sequence component power flow.
针对中性点不接地系统无零序通路的特点,推导出一种新的适用于负荷不对称配网的序分量潮流算法。
3.
Based on the detailed analysis of various fault characteristics of asynchronous motor,this paper brings forward an integrated microcomputer protection scheme which has sequence components as the basic protection criteria,and integrates heat accumulation and diffusion model.
通过对异步电动机各类故障特征的详细分析 ,提出了以序分量为基本保护判据、结合热积累和热发散模型 ,构成微机型电动机综合保护的方案。
2) Sequence components
序分量
1.
This paper proposes a new phase selector based on fault sequence components and fuzzy logic theory by the deep analysis upon the operating characteristics of traditional phase selector.
在对两种传统的序分量比相选相元件的动作特性进行深入分析的基础上 ,提出了一种基于模糊逻辑的新型故障序分量选相元件。
2.
this paper proposes a new theory that can improve the sensitivity of current protection by sequence components andovercome the influence of fault type on the sensitivity of current protection.
为了避免小电流接地系统中 ,电流保护的灵敏度受故障类型和相别的影响 ,提出了一种利用序分量提高电流保护灵敏度的新原理。
3) positive sequence component
正序分量
1.
Design of integrated circuit positive sequence component and negative sequence component filter;
集成电路型正序分量和负序分量过滤器的设计
2.
A new method for detecting the fundamental negative and positive sequence components as well as the harmonic components is developed in this paper.
提出了一种新的实时检测基波正序分量、基波负序分量和谐波分量的方法 ,该方法首先将三相瞬时值合成一个空间矢量 ,然后对所得矢量的实部和虚部分别进行滤波以滤去谐波分量。
3.
By using the positive sequence component of voltage and current synchronously sampled at both terminals,the positive-sequence voltage of fault point can be deduced from both terminal based on uniform transmission line equations,then the fault location equation can be got.
基于分布参数模型,提出了一种不同电压等级的同杆并架多回线路故障测距方法:利用两端同步的电压和电流的正序分量,根据均匀传输线方程从线路两端分别推导出故障点处的正序电压,进而得出故障测距公式。
4) negative sequence component
负序分量
1.
Design of integrated circuit positive sequence component and negative sequence component filter;
集成电路型正序分量和负序分量过滤器的设计
2.
Principle investigation and simulation research on pilot zero sequence directional protection with compensation of negative sequence component;
基于负序分量补偿的纵联零序方向保护判据与仿真研究
3.
The new scheme uses zero sequence components as operation component and negative sequence components as restraint component to discriminate whether the fault is in the internal or external zone.
提出一种用零序分量做动作量,负序分量做制动量的综合序分量接地距离继电器。
5) zero-sequence component
零序分量
1.
A zero-sequence component imposed vector control system of induction machine based on three-level NPC(Neutral Point Clamped) inverter is proposed,which adopts direct rotor-flux-oriented vector control mode.
提出一种基于三电平中点箝位(NPC)逆变器的零序分量注入型感应电动机矢量控制方案。
2.
Because there is no need for acquiring the zero-sequence component,this principle can eliminate the effect of zero-sequence mutual inductance between coupling lines.
由于该方法中没有用到线路两端的零序分量,消除掉耦合线路之间零序互感对测距的影响。
6) zero sequence component
零序分量
1.
The new scheme uses zero sequence components as operation component and negative sequence components as restraint component to discriminate whether the fault is in the internal or external zone.
提出一种用零序分量做动作量,负序分量做制动量的综合序分量接地距离继电器。
补充资料：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。
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