Fuzzy Rule Based Load Frequency Control in a Parallel AC – DC Interconnected Power Systems Through Hvdc Link

In this paper, a fuzzy logic controller is proposed for an application of HVDC link to stabilize the frequency oscillation in a parallel AC – DC interconnected power systems. When an interconnected AC power system is subjected to a load disturbance, system frequency may be considerably disturbed and becomes oscillatory. By utilizing the system interconnections as the control channels of HVDC link, the tie line power modulation of HVDC link through interconnections is applicable for stabilizing the frequency oscillation of AC system. The conventional Integral controller does not yield adequate control performance. To overcome this problem Fuzzy Logic Controller (FLC) is employed with a set of control rules. The proposed control technique is studied for a two area non reheat thermal power systems. From simulation results, the performance of the FLC is better during load disturbances.

[1]  Ali Feliachi,et al.  Robust load frequency control using genetic algorithms and linear matrix inequalities , 2003 .

[2]  George Gross,et al.  Analysis of Load Frequency Control Performance Assessment Criteria , 2001 .

[3]  I. Ngamroo.  A Stabilization of Frequency Oscillations in a Parallel AC-DC Interconnected Power System via an HVDC Link , 2003 .

[4]  G. Gross,et al.  Analysis of Load Frequency Control Performance Assessment Criteria , 2001, IEEE Power Engineering Review.

[5]  S. Velusami,et al.  Decentralized Biased Controllers for Load — Frequency Control of Interconnected Power Systems Considering Governor Dead Band Non-Linearity , 2005, 2005 Annual IEEE India Conference - Indicon.

[6]  Chia-Feng Juang,et al.  Power system load frequency control by evolutionary fuzzy PI controller , 2004, 2004 IEEE International Conference on Fuzzy Systems (IEEE Cat. No.04CH37542).

[7]  Chia-Feng Juang,et al.  Power system load frequency control by genetic fuzzy gain scheduling controller , 2005 .

[8]  Ali Feliachi,et al.  PI gain scheduler for load frequency control using spline techniques , 2003, Proceedings of the 35th Southeastern Symposium on System Theory, 2003..

[9]  Ibraheem,et al.  Recent philosophies of automatic generation control strategies in power systems , 2005, IEEE Transactions on Power Systems.

[10]  Jawad Talaq,et al.  Adaptive fuzzy gain scheduling for load frequency control , 1999 .

[11]  I. Hiskens,et al.  Simulation and optimization in an AGC system after deregulation , 2001, PICA 2001. Innovative Computing for Power - Electric Energy Meets the Market. 22nd IEEE Power Engineering Society. International Conference on Power Industry Computer Applications (Cat. No.01CH37195).

[12]  M. A. Pai,et al.  Simulation and Optimization in an AGC System after Deregulation , 2001, IEEE Power Engineering Review.