Design and Performance of a Local Gain Scheduling Power System Stabilizer for Inter-Connected System

A new 'Gain Scheduling Stabilizer' for interconnected power systems has been described in this paper. The design of the PSS is based on a priori information about readily available machine and excitation system parameters and 'Observation' for a certain duration of time of the network from the bus of the machine concerned to ascertain the electrodynamic coupling of the machine to rest of the network. The computational complexity of this PSS requires the use of relatively sophisticated computing system. Though, such computers are now available, they are not in common actual power plants. With this in view, the PSS design has been modified so that the adaptive gains are selected in real time based on the operating conditions and worst case network parameters. The modified PSS can be implemented using on-line computers having capabilities similar to those of ordinary PCs or even /spl mu/P systems with moderate memory and computational capabilities.