电力系统的动态分割

DYNAMIC PARTITION OF POWER SYSTEM

电力网络的分割方法以往主要有“点分割”和“边分割”。其实质是将网络矩阵Z或Y按节点或按支路 (联络线 )分割成块 ,这是一种结构分割。网络的参数决定了系统的动态行为 ,根据网络参数进行的分割可名之为动态分割。动态分割应使分割后各子块的动态特性基本不变。该文提出了满足此要求的电力网络的动态分割方法 ,并用于一个大型电力系统状态方程的状态矩阵A的分割 ,及发电机组间的Y阵的分割 (此Y阵可包含机组的dq轴电源参数 ,也可不包含电源参数 )。

The partition of a power network is usually by the method of 'node partition' or 'edge partition',that is: the network matrix Z or Y is partitioned by the node or by the edge into a block bordered matrix.This is a kind of constructional partition. The dynamic behavior of a system is determined by the parameters of the network. Partition based upon parameters of the network might be called dynamic partition. The dynamic behavior of the partitioned parts should be maintained nearly the same after the partition.A method of dynamic partition satisfying this requirement is proposed in the paper. It is applied to the partition of the state matrix A of a large power system in China as well as the Y matrix between the generators, whether the dq parameters of the power source are contained in the Y matrix or not. The consistence between the results of the different partitions is pointed out too.