1) node impedance matrix
节点阻抗矩阵
1.
The authors propose a method to estimate operational variables of power system by use of higher order Taylor series after transmission line is out of operation, the advantage of this method lies in that the admittance matrix is not to be re-factorized after one branch is out of operation and the node impedance matrix is also not to be used during the calculation.
提出用高阶泰勒级数来估计线路开断以后系统的各个运行变量的方法,其优点是在线路开断时不必对系统导纳矩阵因子表进行修正,运算中也不必用到节点阻抗矩阵这一满秩矩阵。
2.
On the basis of this model the calculation method for each element in node impedance matrix is derived, and a simple and accurate algorithm of distribution network short circuit fault is put forward.
通过分析配电网的有向拓扑图，建立了配电网的数学模型——节点线段关联矩阵，并在该数学模型的基础上，分析归纳出节点阻抗矩阵各元素的计算方法。
3.
It first finds out the faulted section, then using synchronized phase measurements and node impedance matrix t
在故障测距部分,本文对于原本只适用于中性点直接接地系统的节点阻抗矩阵迭代逼近法进行改造,发生单相接地故障时,在中性点对地间短时投入一个中电阻,同时修改节点导纳阵,提出基于二分法的迭代逼近算法,使得该方法能适用于中性点不接地系统,以及中性点经消弧线圈接地系统。
2) nodal impedance matrix
节点阻抗矩阵
1.
Recursive algorithm for modifying nodal impedance matrix;
修正节点阻抗矩阵元素的递归算法
2.
It is concluded that the uniform algorithm of only forming nodal impedance matrix of distribution network and forming nodal impedance matrix of distribution network when the topology of distribution network is changed based on that distribution network has less circles or weak-related circles,using the branch superaddition method to form nodal impedance matrix.
利用支路追加法生成节点阻抗矩阵的原理,根据配电网为少环状或弱环状的结构特点,归纳出单独形成配电网节点阻抗矩阵和计及配电网网络拓扑结构变化时配电网节点阻抗矩阵的统一算法。
3.
The aim of the paper is to receive nodal impedance matrix by adding- branch line algorithm and admittance matrix algorithm, to analyze the effect of them, and to provide the models.
使用了支路追加法和导纳矩阵求逆法来形成节点阻抗矩阵,给出了两种算法的数学模型,分析了算法各自的特点和优势。
3) Node impedances matrix
节点阻抗矩阵
1.
The current of current-controlled current source (CCCS) branch is controlled by the current of another branch, which makes it difficult to build the node impedances matrix (Z-matrix).
电流控制电流源(CCCS)存在不同支路电流之间的控制行为,给该类网络节点阻抗矩阵的形成带来困难。
4) bus impedance matrix
母线阻抗矩阵，节点阻抗矩阵
5) nodal impedance matrix
节点阻抗阵
1.
According to the feature of network configuration and based on multi-port compensation technique,the approach uses the network branch equation to directly constitute the nodal impedance matrix.
提出了一种形成配电网节点阻抗阵的新方法。
6) impedance matrix
阻抗矩阵
1.
The theory of second generation wavelet interpolation and a method of separating the relationship between close distance and far distance are adopted in this algorithm,through which elements of impedance matrix can be filled efficiently.
该算法采用二代小波插值理论,通过近相关和远相关分离的办法,实现了阻抗矩阵元素的快速填充,从而实现目标雷达散射截面(RCS)的快速计算。
2.
Numerical examples demonstrate that the presented method can greatly increase the accuracy of calculation of the self-interaction and near-interaction impedance matrix elements.
数值实验表明该方法能够大幅提高自作用和近作用阻抗矩阵元素的计算精度。
3.
Adopting fault calculation model based on nodal impedance matrix and by means of preforming equivalent netw.
为此文章提出了一种计及厂站方式切换的快速故障计算方法,采用基于节点阻抗矩阵的故障计算模型,通过预先形成不同方式下的厂站单点或两点Π型等值网络参数,将厂站方式的切换转变为等效的简单网络操作。
补充资料：节点阻抗矩阵
节点阻抗矩阵
node impedance matrix
由此节点阻抗矩阵元素的物理意义可表述为:网络中节点i注人单位电流时，网络各节点电压即为节点阻抗矩阵第i列值。 节点阻抗矩阵特点通常电力网节点阻抗矩阵有如下特点。 (l)节点阻抗矩阵是一个对称的方阵。矩阵的非对角元素z。一Z，。 (2)节点阻抗矩阵是一个没有零元素的满矩阵。 节点阻抗矩阵应用电力系统分析计算曾广泛应用节点阻抗矩阵方程求解网络。对于已知节点注人电流求解节点电压的计算，用节点阻抗矩阵方程可迅速求出结果;用节点阻抗矩阵方程迭代求解潮流问题，收敛性好。然而由于节点阻抗矩阵是对称的满矩阵，对计算机的存储量需求大，已逐渐为以节点导纳矩阵为基础的稀疏矩阵算法中的稀疏矩阵替代。尽管如此，用式(3)所示的稀疏矩阵算法求取节点阻抗矩阵某列元素.用以进行有关计算，仍然是电力系统短路电流计算、复杂故障计算、暂态稳定计算和静态德定计算经常采用的方法。iled~ar、zL．Lk,or、g Juzhen节点阻抗矩阵 (node impeclance mat“x)以系统元件的等值阻抗为基础所建立的、描述电力网络各节点电压和注入电流之间关系的线性方程组的系数矩阵。因矩阵元素由网络节点自阻抗和节点间互阻抗组成而得名。它是节点导纳矩阵的逆矩阵。 节点阻抗矩阵的基本形式用数学方法描述电力网络各节点电压和各节点注入电流之间关系的方程式，称为电力系统网络方程，其最常见的形式之一是阻抗矩阵方程，n个节点网络的方程形式如下
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