Study On Power System Transient Stability Simulation Using Object-Oriented Technique

With the fact that power system software has evolved to be so complicated that it is becoming increasingly difficult to maintain and enhance the software, this thesis has made an important attempt concerning the application of Object-Oriented Technique (OOT) in the development of power system software. The main subject is focused on the transient stability simulation of power system using OOT.The thesis has mainly finished the following work:An Object-Oriented model of power system is presented, including the detailed dynamic modeling of the components in power system. The model is pertinent to the real condition of power system and has the characteristics of great generality and flexibility.Based on the Object-Oriented model founded, an Object-Oriented power system transient stability analysis package is developed, using VC++ program language. Both complicated and simple model of transient stability analysis are integrated in the software, applying the model of each component to different degree of precision respectively. Joined with the power system diagram editor, the transient stability analysis can be carried out in a graphical way.Some auxiliary models are introduced, such as the classes of fault information and swing curves, etc. These models turn out to be essential to make the procedure of transient stability simulation vivid and intuitionistic, with the swing curves of different variables during the transient period being showed and printed conveniently.The Object-Oriented power system transient stability simulation software provides a vivid and friendly man-machine interface (MMI). According to the test of a given system, the whole software is proved to have the characteristics of precise calculation and convenient operation, which further proves the immense potentiality of the application of OOT in the development of power system software.