American Journal of Electrical and Electronic Engineering
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American Journal of Electrical and Electronic Engineering. 2014, 2(2), 27-39
DOI: 10.12691/ajeee-2-2-1
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Reduction of Damping Oscillations of Power Systems with Combinational Operation of LFC & AVR in Single Area

Jyothilal Nayak Bharothu1, and G Venkatesh1

1Associate professor of Electrical & Electronics Engineering, Sri Vasavi Institute of Engineering & Technology, Nandamuru, India

Pub. Date: January 16, 2014

Cite this paper:
Jyothilal Nayak Bharothu and G Venkatesh. Reduction of Damping Oscillations of Power Systems with Combinational Operation of LFC & AVR in Single Area. American Journal of Electrical and Electronic Engineering. 2014; 2(2):27-39. doi: 10.12691/ajeee-2-2-1


The main aim of this paper is to reduce the damping oscillations. In this paper a new model is proposed to show the interaction between load frequency oscillations and automatic voltage regulator loops and to achieve more accuracy in dynamic and steady state response. The major problem arising from large scale electric power system interconnection is the low frequency oscillation of interconnected system. In order to maintain all the scheduled power transactions to the constant value, automatic generation control of a power system with closed loop feedback is used. By using the data acquisition system which conducts the actual operating conditions of the systems and the errors are computed. In ordered to maintain the level of voltage and frequency automatic generation control method through LFC loops is used.

damping oscillations LFC AVR MAT LAB Simulink

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[1]  Yau-NaN yu, Electric Power System Dynamics, London, AcademicPress, 1983.
[2]  S. C. Tripathy, N. D. Rao, and L. Roy, “Optimization of exciter andspeed governor control parameters in stabilizing intersystem oscillationswith voltage dependent load Characteristics,” Electric Power and EnergySystems, vol. 3, pp. 127-133, Jul. 1981.
[3]  K. Yamashita and H. Miyagi, “Multivariable self-tuning regulator forload frequency control system with interaction of voltage on loaddemand,” in Proc. 1991 IEE Control Theory and Applications Conf.,vol.138, pp. 177-183.
[4]  N. Jaleeli, L.S. VanSlyck, D.N. Ewart, L.H. Fink and A.G. Hoffmann, “Understanding automatic generation control,” IEEE Trans. on Power Systems, vol. 7, no. 3, pp. 1106-1112, Aug. 1992.
[5]  Ibraheem, P. Kumar and D.P. Kothari, “Recent Philosophies of Automatic Generation Control Strategies in Power Systems,” Power IEEE Trans. on Systems, vol. 20, no. 1, pp. 346-357, Feb. 2005.
[6]  H. Saadat, Power system analysis, USA: McGraw-Hill; 1999.
[7]  J. Sadeh and E. Rakhshani, “Multi-area load frequency control in a deregulated power system using optimal output feedback method,” 5th International Conference on European Electricity Market, May. 2008.
[8]  E. Rakhshani and J. Sadeh, “Simulation of two-area AGC system in a competitive environment using reduced-order observer method,” 5th International Conference on European Electricity Market, May. 2008.
[9]  P. Kundur, Power System Stability and Control, McGraw-Hill Inc., 199.
[10]  O.I.Elgerd and C.E.Fosha presents the development of state variable model of the megawatt frequency control problem of multi-area electric energy systems and applications of theorems of modern optimal control theory.
[11]  Ibrahim and P Kumar paper presents a comprehensive study on dynamic performance of two area power system when subjected to parameter uncertainties.
[12]  M.M. Adibi, J.N. Borkoski, R.J. Kkafka, and T.L. Volkman present the frequency response rates and reserve rates developed for typical combustion turbines, steam electric units and hydro electric units.
[13]  N.N.Benjamin and W.C.Chan presents a two level optimal control for the load frequency control of inter connected power system using optimal control and multi level system techniques
[14]  H. Shayeghi, H. A. Shayanfar, “PSO based neuro-fuzzy controller for LFC design including communication time delays”, International Journal on TPE (Technical and Physical Problems of Engineering) IJTPE, Vol. 1, No. 2, pp. 28-36, June 2010.
[15]  A. Soundarrajan, Dr. S. Sumathi, C. Sundar, “Particle swarm optimization based LFC and AVR of autonomous power generating system”, IAENG International Journal of Computer Science, Vol. 37, No. 1, 2010.
[16]  D. Karaboga, B. Basturk, “A powerful and efficient algorithm for numerical function optimization: Artificial Bee Colony (ABC) algorithm”, Journal of Global Optimization, Springer Netherlands, Vol. 39, No.3, pp.459-471, 2007.