Transient stability control of an area network

Design of a generator tripping system to enhance the transient stability of an area power network using a quasi-real-time method is presented. The Hunjiang power system in China is selected to implement the design scheme. The necessary hardware and software that are required to implement the control scheme, is outlined. The fast transient stability assessment, which uses the technology such as dynamic equivalence, state estimation and direct transient energy function method, is provided to form a control strategy table. According to this table, when a large disturbance occurs, the estimated amount of generation will be tripped to maintain the rest of the generators in stable state in the power system. The studies reveal that the generator tripping system can adapt to the changes of load and generation in the system as well as changes in the network topology. This paper also outlines the new features compared with the existing conventional control system and proposes the strategies in the event of failure of the generator tripping system.