An Improved Method of Electric Braking for Power System Transient Stability in Severe Emergency Disturbances

Abstract

The paper deals with the problem of maintaining the transient stability of the electric power system under severe emergency disturbances. The relevance of the study is due to the continuity of the processes of production, transmission, and consumption of electric power. The lack of energy storage technologies in the volumes necessary for the consumer causes increased requirements for power system reliability, transient stability, and survivability. The paper provides an overview of the existing and modern developed methods of increasing transient stability. An improved method of electric braking for synchronous generators is proposed, which provides transient stability under severe disturbances of any severity and duration. The method ensures successful resynchronization under generator loads up to the steady-state stability limit for the post-emergency conditions. A description of the method of electrical braking is presented, which requires precision synchronization with control of voltages, angles, and slip between synchronizing zones. The results of the developed method implementation for a two-machine system are illustrated, transient oscillograms are shown. Mathematical modeling was performed using the Mustang software package. The results of mathematical modeling prove the effectiveness of the proposed method. The developed method of electric braking makes it possible to refuse additional network construction to meet the requirements for transient stability.