Remotely cut-off electrical generators to improve the transient stability of faulty power systems

With the rapid progresses in the interconnection of national power systems in China, its scale grows fast, its dynamics becomes more and more complex, and the faults of the power grid could significantly damage the national economy. In event of electrical faults, some switches may be opened or closed to modify the configuration of the power systems and avoid the loss of synchronization among multiple electrical generators. This traditional method, however, may not be enough to handle the newly emerging severe faults. So we consider to remotely cut-off some electrical generators to improve the system´s performance. The fault information is sent through a digital information network, to say the Internet, to the power plants and a certain number of electrical generators are turned off. In such a networked system, the network transmission delay plays a critical role. We quantitatively investigate the effects of that delay and the number of electrical generators to be turned off on the power system´s transient stability. Simulations are done to verify the achieved results.