Design and application fuzzy PSS for power systems subject to random abrupt variations of the load

A design method and application of fuzzy power system stabilizers for electrical power systems subject to random abrupt variations of loads are considered. A new control design method that uses recently developed techniques based on linear matrix inequalities with damping and control input constraints for fuzzy logic control design is proposed. Random abrupt variations caused by fluctuations in the load patterns are described as Markovian jumps in the parameters of the electrical power system. To illustrate the effectiveness of the control design method, simulation results on a single-machine infinite-bus model are presented and compared to the results of a classical power system stabilizer.