Power Quality Enhancement in Electrical Systems Using Shunt Active Power Filter: A Literature Review

This paper presented a comprehensive review of Shunt active power filters (SAPFs) for harmonic mitigation and reactive power compensation in modern electrical distribution systems. The study discussed SAPF operating principles, configurations, reference current extraction methods and various control approaches including HCC, SPWM, FLC, ANN, SMC and optimization based controllers. The review showed that intelligent optimization techniques such as PSO, GA and GWO significantly decrease total harmonic distortion (THD), improves power factor, DC link voltage regulation and transient response. The application of SAPF with smart grids and microgrids was also examined. The study concluded that SAPF provide superior power quality improvement compared with conventional passive filtering techniques. Future research should focus on adaptive intelligent control, real time implementation, reduced computational complexity and cost effective SAPF design for next generation power systems.

1.                Mohit Bajaj and Amit Kumar Singh. Grid integrated renewable dg systems: A review of power quality challenges and state-of-the-art mitigation techniques. International Journal of Energy Research, 44(1):26–69, 2020. 2.                 Soumya Ranjan Das, Prakash Kumar Ray, Arun Kumar Sahoo, Somula Ramasubbareddy, Thanikanti Sudhakar Babu, Nallapaneni Manoj Kumar, Rajvikram Madurai Elavarasan, and Lucian Mihet-Popa. A comprehensive survey on different control strategies and applications of active power filters for power quality improvement. Energies, 14(15):4589, 2021. 3.                 Dipak Kumar Dash and Pradip Kumar Sadhu. A review on the use of active power filter for grid-connected renewable energy conversion systems. Processes, 11(5):1467, 2023. 4.                 Juntao Fei, Shenglei Zhang, and Jian Zhou. Adaptive sliding mode control of single-phase shunt active power filter. Mathematical Problems in Engineering, 2012(1):809187, 2012. 5.                Zineb Hekss, Abdelmajid Abouloifa, Ibtissam Lachkar, Abdelali El Aroudi, Salwa Echalih, Mohammed Al-Numay, and Fouad Giri. Advanced nonlinear controller of single-phase shunt active power filter interfacing solar photovoltaic source and electrical power grid. International Transactions on Electrical Energy Systems, 31(12):e13237, 2021. 6.                Srilakshmi Koganti, Krishna Jyothi Koganti, and Surender Reddy Salkuti. Design of multi-objective-based artificial intelligence controller for wind/battery-connected shunt active power filter. Algorithms, 15(8):256, 2022. 7.                P Rajesh Kumar, Chapala Shravani, M Rajitha, and Ch Lokeshwar Reddy. A review of emerging techniques for power quality improvement in renewable energy integration. In E3S Web of Conferences, volume 616, page 03029. EDP Sciences, 2025. 8.                Ravinder Kumar, Hari Om Bansal, Aditya R Gautam, Om Prakash Mahela, and Baseem Khan. Experimental investigations on particle swarm optimization based control algorithm for shunt active power filter to enhance electric power quality. IEEE Access, 10:54878–54890, 2022. 9.                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. 10.             Xiaodong Liang. Emerging power quality challenges due to integration of renewable energy sources. IEEE Transactions on Industry Applications, 53(2):855–866, 2016.