Title: A novel fuzzy logic controller for STATCOM to improve power system stability

Authors: B.K. Panigrahi, M.K. Mallick, S.S. Dash

Addresses: Department of Electrical Engineering, IIT, New Delhi 110016, India. ' Department of Electrical Engineering, ITER, Jagamohan Nagar, Bhubaneswar, Orissa, India. ' Department of Electrical Engineering, SSN College of Engineering, Chennai, India

Abstract: This paper presents an application of Single-input Fuzzy Logic Controller (SFLC) to determine the control signal of a Static Compensator (STATCOM) synchronous for improvement of power system stability. This compensation scheme is relevant to Flexible AC Transmission systems (FACTSs) technology which is used worldwide to improve system dynamic performance. STATCOM improves the damping of electromechanical oscillations when used in transmission systems. The SFLC uses only one input variable which is called as signed distance. The SFLC has the advantages of reduced number of rules. Thus, generation, estimation and tuning of control rules are much easier while comparing with the existing conventional Fuzzy Logic Controllers (FLCs). The proposed control method is applied to control the AC and DC bus voltage of a STATCOM connected at a load bus in a Single Machine Infinite Bus (SMIB) System and also to improve the power system stability.

Keywords: static compensators; STATCOM; voltage source inverter; VSI; fuzzy control; transient stability; fuzzy logic; power system stability; flexible AC transmission; control rules; damping; electromechanical oscillations.

DOI: 10.1504/IJAAC.2007.013294

International Journal of Automation and Control, 2007 Vol.1 No.1, pp.4 - 15

Published online: 19 Apr 2007 *

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