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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/7391
Title: Fuzzy Type-2 Controller Design for Small-Signal Stability Considering Time Latencies and Uncertainties in PMU Measurements
Authors: Sharma C.
Tyagi, Barjeev
Published in: IEEE Systems Journal
Abstract: Wide-area damping controllers are generally provided in a large network to prevent small-signal oscillations. These controllers utilize remote measurements provided by synchrophasors. However, these communicated measurements are delayed and uncertain. Type-2 fuzzy provides higher order approximation of uncertainty and is able to provide solutions for real-world problems in more a reliable manner. Therefore, in this paper, a wide-area damping controller based on interval type-2 fuzzy system is designed. Proposed controllers not only consider time latencies of communicated signals but also eliminate various measurement uncertainties and noise by modeling foot of uncertainty (FOU). First, eigenvalue analysis of the system is performed to identify interarea modes responsible for small-signal instability. To nullify this instability, a control scheme is proposed. In proposed control scheme, participation factors are utilized to select suitable controller location. However, feedback signals are chosen through controllability indexes. Later, type-1 and type-2 controllers are designed by changing membership functions. Performance of type-2 controllers is checked for different FOUs. Furthermore, type-1 and type-2 controllers are compared, in terms of settling time, peak overshoot, and damping factor. Effectiveness of proposed control scheme and controllers are successfully tested on two-area four-machine and five-area sixteen-machine systems. © 2007-2012 IEEE.
Citation: IEEE Systems Journal (2017), 11(2): 1149-1160
URI: https://doi.org/10.1109/JSYST.2014.2336864
http://repository.iitr.ac.in/handle/123456789/7391
Issue Date: 2017
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: Phasor measurement units (PMUs)
small-signal stability (SSS)
time latency
type-2 fuzzy systems
uncertainties
wide-area measurements
ISSN: 19328184
Author Scopus IDs: 7202115239
7005609418
Author Affiliations: Sharma, C., Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Tyagi, B., Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Appears in Collections:Journal Publications [EE]

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