Affiliations: [a] Department of Electrical Engineering, Rajasthan Technical University, Kota, Rajasthan, India
| [b] Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttaranchal, India
Abstract: In this paper the performance analysis of an interval type-2 fuzzy logic controller (IT2 FLC) as a power system stabilizer (PSS) is carried out. The input signals to the controller are considered as speed deviation and acceleration. The application of IT2 FLC as PSS (IT2 FPSS) is considered to improve small signal stability of power system. It is considered for three different benchmark systems such as single-machine infinite-bus (SMIB), two-area four-machine and IEEE ten-machine thirty nine-bus power system. The performance with IT2 FPSS is compared against the performance of the power system without PSS, with conventional PSS (CPSS) and with fuzzy PSS (FPSS). The application of IT2 FPSS is extended to two-area four-machine ten-bus and IEEE New England ten-machine thirty nine-bus power system and speed response comparison is carried out with FPSS. The superiority of performance with IT2 FPSS over type-1 FPSS is validated in terms of ITAE, IAE and ISE.
Keywords: Power system stabilizer, fuzzy logic based power system stabilizer (FPSS), interval type-2 fuzzy power system stabilizer (IT2 FPSS), conventional PSS (CPSS), single-machine infinite-bus (SMIB), two-area four-machine power system, IEEE New England ten-machine thirty nine-bus power system
