Comparison of Input Signal Choices for a Fuzzy Logic-based Power System Stabilizer

Variability in power systems in increasing due to pushing the system to limits for economic purposes, the inclusion of new energy sources like wind turbines and photovoltaic, and the introduction of new types of loads such as electric vehicle chargers. In this new environment, system monitoring and control must keep pace to insure system stability and reliability on a wide area scale. Phasor measurement unit technology implementation is growing and can be used to provide input signals to new types of control. Fuzzy logic based controllers have also been shown effective in various studies. This paper considers several choices of input signals, composed assuming phasor measurement availability, for a common fuzzy logicbased controller. Nonlinear transient simulation results for two fault locations for a two-area system are used to compare the effects of input choice on damping of system oscillations.