Coordinated fuzzy logic control for series capacitor modules and PSS to enhance stability of power system

This paper presents an application of a fuzzy logic control scheme for switched series capacitor modules to enhance the overall stability of electric power systems. Through the signal conditioning of the measured real power flow at the location of the series capacitor modules, the phase/speed state of the electric power system is obtained to determine the number of capacitors energized at the state. The switching rules are quite simple so as not to give heavy computation to the microcomputer utilized for the real-time switching control of the series capacitor modules. A multimachine power system is used to demonstrate the efficiency of the proposed switching control scheme, and coordination with power system stabilizers is considered