Dynamic Simulation of Large-Scale Power Systems Using a Two-Level Computation Tree Model

A new tree structure called the two-level computation tree model is proposed for real time dynamic simulation of large-scale power systems. The features of the computation tree method are that the root node of the tree corresponds to a disconnected linear network, which is easy to be dealt with, and the tree leaf-nodes represent the partitioned subsystems. In the process of trajectory simulation, the correction factors of Newton type iteration are computed through a tree traversal procedure. One advantage of the new method is that the computation tasks for all subsystems can be carried out simultaneously using any parallel computation facilities. Case studies on the 10-generator New England test power system and on a representation of Northeast China power system verify the accuracy and validate the potential application of the proposed method in the real time contingency simulation for realistic large-scale power system.