同调机组群的不对称Y阵动态等值法

根据电力系统分析中网络计算数学模型（节点电压方程）同调的特点,利用节点电压方程降维的待定系数法,在尽可能保持节点导纳矩阵对称性下,提出了仅个性一列或部分列元素的不对称Ｙ阵动态等值法。该方法原理简明,应用灵活方便,算例表明,即使在不严格同调的情况下,也能得到较高的精度。

UNSYMMETRIC Y MATRIX DYNAMIC EQUIVALENCE FOR COHERENCE GENERATOR GROUPS

On the basis of the coherent feature of the network calculation (the bus voltage equation) in power system analysis, an undetermined coefficient method for reducing the dimensions of the bus voltage equation is presented. In order to keep the symmetry of the bus admittance matrix, an unsymmetric Y matrix dynamic equivalence is made up, in which only one column or partial column of the matrix are modified. The principle of this method is simple and its application is flexible and easy. The calculation result shows that a quite good computation precision can be obtained even though the coherence is not strict.