Mitigation of subsynchronous resonance using UPFC with fuzzy logic control for power system stability

This paper presents the study of a very severe problem occurring in power systems, i.e. Subsynchronous Resonance (SSR). In today's time when the electricity is the life on earth and the quality of power provided has been the key point of focus, this study gives a way of improving this power quality. When the transfer of power is done from one place to another through long transmission line, there is a need for series compensators. These series compensators under certain conditions give rise a resonant currents causing a phenomenon called SSR. In this study this problem is mitigated using UPFC in the transmission line. This UPFC is further equipped with Fuzzy Logic Controller (FLC) giving the better results. The comparative results are shown in the study to prove the effectiveness of designed control scheme.