Low Frequency Oscillations Damping by UPFC with a Multi Stage Fuzzy and Supplementary Controllers

D. Obulesu(1*), S. F. Kodad(2), B. V. Sankar Ram(3), M. Sankaraiah(4)

(1) Department of Electrical & Electronics Engg., VEMU.I.T.,P.Kothakota,Chittoor dist, Andhra Pradesh-517325, India
(2) Krishna Murthy Institute of Technology and Engineering, Hyderabad, India
(3) J.N.T.U.H, Hyderabad, India
(4) N.B.K.R.Institute of science and technology, India
(*) Corresponding author


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Abstract


Low frequency electromechanical oscillations are inevitable characteristics of power system which affect the transmission line transfer capability and the system stability. In this work, a new POD controller with DC-voltage regulator based on genetic algorithm is proposed for the UPFC for damping low frequency oscillations. The construction and implementation of this controller is fairly easy, which can be useful in real world power system. The effectiveness of the proposed controller has been tested on a SMIB power system in comparison with conventional UPFC controllers, GAMSF DC-voltage regulator and PSOMSF DC-voltage regulator under different operating conditions.
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Keywords


FACTS; UPFC; Multi-Stage Fuzzy Controller (MSF); GAPOD (Genetic Algorithms Based Power Oscillation Damping); PSO Based MSF (PSOMSF); GA DC-Voltage Regulator

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