Design and Simulation of Optimized Load Frequency Control in Multi-Area Electrical Interconnection Systems

Abstract

Maintaining frequency stability in modern interconnected power systems is critical for operational reliability, especially under varying load demands. Load Frequency Control (LFC) plays a pivotal role in balancing power exchanges and preserving nominal frequency across multi-area grids. This paper presents the design, modeling, and optimization of a two-area Load Frequency Control (LFC) system in interconnected power networks using MATLAB/Simulink. Each area comprises a governor, turbine, generator-load system, and a PID controller to regulate frequency deviations and maintain system stability following load disturbances. The study investigates the effects of key system parameters—including governor and turbine time constants, generator inertia, and tie-line coupling—on dynamic performance. To address mismatched responses between areas, Particle Swarm Optimization (PSO) is employed to tune system parameters and improve coordination. The optimization aims to minimize frequency deviations and tie-line power fluctuations while enhancing system response. Simulation results show that the proposed optimization approach significantly improves dynamic performance. Specifically, frequency deviations in both areas are reduced by over 55%, tie-line power fluctuation is minimized by 62.5%, and settling times for frequency responses are shortened by over 44%. These improvements demonstrate the effectiveness of the optimization strategy in enhancing inter-area coordination and system resilience. The framework also serves as a practical simulation-based educational tool for power engineering students and researchers to exploreLFC design and control strategies in multi-area systems.

Keywords

Load Frequency Control (LFC); multi-area power system; simulink; PID controller; Particle Swarm Optimization (PSO).

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References

Energy Charter Secretariat, Electricity Interconnections of Turkey, Brussels, Belgium, Mar. 2012. https://www.energycharter.org/fileadmin/DocumentsMedia/Events/20120328-ESM_Turkey.pdf

National Electric Power Company (NEPCO), “Interconnection Projects.” https://nepco.com.jo/en/Interconnection.aspx

Jordan Times, “2nd phase of Jordan Iraq electrical interconnection project in final stages – official,” Jul. 2023. https://www.jordantimes.com/news/local/2nd-phase-jordan-iraq-electrical-interconnection-project-final-stages-%E2%80%93-official

Energy & Utilities, “Saudi Arabia and Iraq sign agreement for electricity interconnection,” Sep. 2022. https://energy-utilities.com/saudi-arabia-and-iraq-sign-agreement-for-news118145.html

U.S. Energy Information Administration (EIA), Country Analysis Brief: Saudi Arabia, Feb. 2022. https://www.eia.gov/international/content/analysis/countries_long/Saudi_Arabia/pdf/Saudi-Arabia.pdf

A. S. Azad, “Automatic generation control of two area system in Simulink,” MATLAB Central File Exchange, 2023. https://www.mathworks.com/matlabcentral/fileexchange/154501-automatic-generation-control-of-two-area-system-in-simulink

J. A. Laghari, “Load frequency control model in MATLAB/Simulink,” MATLAB Central File Exchange, 2022. https://www.mathworks.com/matlabcentral/fileexchange/93810-load-frequency-control-model-in-matlab-simulink

M. N. Hawas, I. J. Hasan, and M. J. Mnati, “Simulation and analysis of the distributed photovoltaic generation systems based on DIgSILENT PowerFactory,” Indonesian Journal of Electrical Engineering and Computer Science, vol. 28, no. 3, pp. 1227–1238, 2022. http://dx.doi.org/10.11591/ijeecs.v28.i3.pp1227-1238

K. G. Abdulhussein, N. M. Yasin, and I. J. Hasan, “Comparison of cascade P PI controller tuning methods for PMDC motor based on intelligence techniques,” International Journal of Electrical and Computer Engineering (IJECE), vol. 12, no. 1, pp. 1–11, 2022. http://dx.doi.org/10.11591/ijece.v12i1.pp1-11

Y. Liu et al., “Impact of wind power integration on frequency stability of two area interconnected power system,” Processes, vol. 11, no. 8, art. 2488, 2023. http://dx.doi.org/10.3390/pr11082488

A. A. Saleh and A. A. Hussain, “Load frequency control of multi source power system using PSO tuned PID controller,” Technologies, vol. 11, no. 1, art. 22, Jan. 2023. http://dx.doi.org/10.3390/technologies11010022

SimulationTutor.com, “Load Frequency Control with Kalman Filter – MATLAB Simulink Example,” 2021. https://simulationtutor.com/load-frequency-control-with-kalman-filter-matlab-simulink/

I. J. Hasan, B. M. Waheib, N. A. Salih, and N. I. Abdulkhaleq, “A global system for mobile communications based electrical power consumption for a non contact smart billing system,” International Journal of Electrical and Computer Engineering, vol. 11, no. 6, pp. 4659–4666, Dec. 2021. http://dx.doi.org/10.11591/ijece.v11i6.pp4659-4666

H. Wang, H. R. Cai, and M. Ding, “A simulation based education model for power systems using Simulink,” Energy Procedia, vol. 153, pp. 45–50, 2018.

M. Khodabakhshian and M. Edrisi, “A new fuzzy PID controller design for load frequency control,” Journal of Electrical Engineering & Technology, vol. 10, no. 2, pp. 682–690, Mar. 2015.

K. G. Abdulhussein, N. M. Yasin, I. J. Hasan, and K. G. Abdulhussein, “Comparison between butterfly optimization algorithm and particle swarm optimization for tuning cascade PID control system of PMDC motor,” International Journal of Power Electronics and Drive Systems, vol. 12, no. 2, pp. 736–744, 2021. http://dx.doi.org/10.11591/ijpeds.v12.i2.pp736-744

I. J. Hasan, N. A. J. Salih, and N. I. Abdulkhaleq, “Three phase photovoltaic grid inverter system design based on PIC24FJ256GB110 for distributed generation,” International Journal of Power Electronics and Drive Systems, vol. 10, no. 3, p. 1215, 2019. http://dx.doi.org/10.11591/ijpeds.v10.i3.pp1215-1222

I. J. Hasan, M. A. Ghani, and C. K. Gan, “Optimum distributed generation allocation using PSO in order to reduce losses and voltage improvement,” in 3rd IET Int. Conf. on Clean Energy and Technology (CEAT), 2014, pp. 1–6. http://dx.doi.org/10.1049/cp.2014.1476

P. Kundur, Power System Stability and Control, New York, NY, USA: McGraw Hill, 1994.

O. I. Elgerd, Electric Energy Systems Theory: An Introduction, 2nd ed., New York, NY, USA: McGraw Hill, 1982.

P. W. Sauer and M. A. Pai, Power System Dynamics and Stability, Upper Saddle River, NJ, USA: Prentice Hall, 1997.

http://dx.doi.org/10.28989/avitec.v7i3.3082

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