Comparison of RBFN based STATCOM, SSSC and UPFC Controllers for Transient Stability improvement

Abstract

This paper presents the comparative performance of radial basis function network (RBFN) controlled voltage source converters (VSC) based flexible AC transmission system (FACTS) devices, such as static synchronous compensator (STATCOM), static synchronous series compensator (SSSC) and unified power flow controller (UPFC) in terms of increase in power handling capacity of the line, improvements in transient stability and damping of oscillations in the single machine infinite bus system (SMIB and multimachine system. The PI & radial basis function network (RBFN) based controllers are designed to coordinate local measurable control inputs to FACTS devices. The damping schemes namely, (i) power oscillation damping (POD) control, and (ii) conventional power system stabilizer (PSS) are tuned to coordinate with proposed RBFN controller. The coordinated action of POD & PSS are included in simulation. The results indicate that the proposed intelligent controllers are capable of exploring advantageous feature of FACTS devices