Assessment of Series Compensator for Ferroresonance Damping in Power System

摘要

Nowadays power quality becomes critical issue in power electrical system. Moreover the connection of three-phase transformer through underground cables is growing fast in residential, commercial, industrial and rural applications. Due to this increasing situation, the possibilities of having a series connected capacitance and a non-linear inductance, prone to ferroresonance, become more probable. In addition, Ferroresonance can occur in power transformers or reactors fed through capacitive coupling from neighbouring phases or lines. Because of that, it is necessary to have a general idea about what would be the best preventive decisions to take in order to avoid unexpected surprises. First of all it is necessary to have accurate model consist of ferroresonance then we should apply any device to smooth the sharp effect of it. In this paper series compensator which is find into one of the FACTS devise has been applied, static synchronous series compensator (SSSC) to palliate ferroresonance. Results also show that using SSSC dramatically decreases and mitigates the ferroresonance shock as well as the instabilities of the network.