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Frontiers in Energy >> 2013, Volume 7, Issue 3 doi: 10.1007/s11708-013-0269-3

An interval type-2 fuzzy logic controller for TCSC to improve the damping of power system oscillations

1. Electronics & Computer Engineering Department, Indian Institute of Technology, Roorkee 247667, India; 2. Electrical Engineering Department, Indian Institute of Technology, Roorkee 247667, India

Available online: 2013-09-05

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Abstract

In this paper an interval type-2 fuzzy logic controller (IT2FLC) was proposed for thyristor controlled series capacitor (TCSC) to improve power system damping. For controller design, memberships of system variables were represented using interval type-2 fuzzy sets. The three-dimensional membership function of type-2 fuzzy sets provided additional degree of freedom that made it possible to directly model and handle uncertainties. Simulations conducted on a single machine infinite bus (SMIB) power system showed that the proposed controller was more effective than particle swarm optimization (PSO) tuned and type-1 fuzzy logic (T1FL) based damping controllers. Robust performance of the proposed controller was also validated at different operating conditions, various disturbances and parameter variation of the transmission line parameters.

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