Power Quality Enhancement In Electrical Power System By Using DCM-ICM IRPT UCBPWM Based Genetic Algorithm Optimized Shunt Active Power Filter

This paper presented a Genetic Algorithm optimized Shunt Active Power Filter (SAPF) for power quality improvement in three - phase distribution systems using Direct Control and Indirect Control based Unit Current Based Pulse Width Modulation (UCBPWM). The proposed system is developed to reduce the harmonic distortion, compensate reactive power, improve source current waveform quality and maintain stable operation under nonlinear load conditions. The SAPF system was modeled and simulated in MATLAB/ Simulink using a Voltage Source Inverter based compensation structure. Instantaneous reactive power theory was employed for reference current generation while the Genetic Algorithm is used to optimize controller parameters for improved dynamic performance and harmonic compensation capability. The Direct Control technique provided the fast current tracking and rapid transient response whereas the Indirect Control method improved the synchronization accuracy and DC link voltage stability. The UCBPWM switching technique generated the accurate inverter gating pulses and improved the compensating current injection performance. Simulation results demonstrated significant improvement in overall power quality after implementation of the proposed SAPF. The distorted source current waveform became nearly sinusoidal after compensation and reactive power demand from the source was effectively reduced. The proposed controller also maintained a stable DC-link voltage under varying load conditions. FFT analysis confirmed substantial reduction in the Total Harmonic Distortion (THD) and the obtained THD value satisfied the harmonic limits specified by IEEE-519 standards. The Genetic Algorithm optimized controller achieved better harmonic mitigation performance, improved steady-state accuracy, reduced transient oscillations and faster convergence compared with the conventional controller tuning methods. The combined implementation of Direct Control and Indirect Control based UCBPWM enhanced the overall compensation capability and operational stability of the SAPF system. The obtained results confirm that the proposed Genetic Algorithm optimized SAPF provides an efficient and reliable solution for the harmonic mitigation and power quality enhancement in modern distribution systems. The proposed method is suitable for industrial and utility applications where the nonlinear loads create severe harmonic disturbances and reactive power problems. Future work may include real time hardware implementation and investigation of advanced hybrid optimization techniques for further improvement in the SAPF performance.

1. Behnam Amini, Hasan Rastegar, and Mohammad Pichan. An optimized proportional resonant current controller based genetic algorithm for enhancing shunt active power filter performance. International Journal of Electrical Power & Energy Systems, 156:109738, 2024. 2. Jan Baros, Vojtech Sotola, Petr Bilik, Radek Martinek, Rene Jaros, Lukas Danys, and Petr Simonik. Review of fundamental active current extraction techniques for sapf. Sensors, 22(20):7985, 2022. 3. Minh Ly Duc, Lukas Hlavaty, Petr Bilik, and Radek Martinek. Harmonic mitigation using meta-heuristic optimization for shunt adaptive power filters: A review. Energies, 16(10):3998, 2023. 4. Annu Govind, Kuldeep Jayaswal, Vijay Kumar Tayal, and Prakash Kumar. Simulation and real time implementation of shunt active power filter for power quality enhancement using adaptive neural network topology. Electric Power Systems Research, 228:110042, 2024. 5. Yap Hoon, Mohd Amran Mohd Radzi, Mohd Khair Hassan, and Nashiren Farzilah Mailah. Control algorithms of shunt active power filter for harmonics mitigation: A review. Energies, 10(12):2038, 2017. 6. Yap Hoon, Mohd Amran Mohd Radzi, Muhammad Ammirrul Atiqi Mohd Zainuri, and Mohamad Adzhar Md Zawawi. Shunt active power filter: A review on phase synchronization control techniques. Electronics, 8(7):791, 2019. 7. Roberto Langella, Alfredo Testa, Et Alii, et al. Ieee recommended practice and requirements for harmonic control in electric power systems. In IEEE recommended practice. IEEE, 2014. 8. Mihaela Popescu, Alexandru Bitoleanu, Constantin Vlad Suru, Mihaita Linca, and Laurentiu Alboteanu. Shunt active power filters in three-phase, three-wire systems: A topical review. Energies, 17(12):2867, 2024. 9. Harnek Singh, Maneet Kour, Dip Vinod Thanki, and Prakash Kumar. A review on shunt active power filter control strategies. International Journal of Engineering & Technology, 7(4.5):121–125, 2018. 10. Shrikant Kumar Namdeo, Sushree Diptimayee Swain. Power quality improvement by using DCC-ICC unipolar CBPWM based shunt active power filter. In 2018 IEEE 8th Power India International Conference (PIICON) (pp. 1-5). IEEE.