International Journal of Applied Power Engineering (IJAPE) Vol. 13, No. 4, December 2024, pp. 844~852 ISSN: 2252-8792, DOI: 10.11591/ijape.v13.i4.pp844-852  844 Journal homepage: http://ijape.iaescore.com A comprehensive review on power quality issues and disturbances mitigation through shunt active power filters Siddharthsingh K. Chauhan 1 , Vineeta S. Chauhan 2 1 Department of Electrical Engineering, Institute of Technology, Nirma University, Ahmedabad, India 2 Department of Electrical Engineering, Indus University, Ahmedabad, India Article Info ABSTRACT Article history: Received Dec 21, 2023 Revised May 6, 2024 Accepted Jun 13, 2024 In contemporary power systems, power quality (PQ) has become a matter of paramount concern. The challenges associated with PQ extend beyond conventional three-phase systems, encompassing the integration of various distributed generation (DG) sources like renewable energy installations, storage systems, and diverse power generation technologies such as diesel generators and fuel cells. The prevalent adoption of rapid-switching devices within the utility infrastructure has resulted in a surge of harmonics and reactive power disturbances. The increased use of harmonics-producing loads has led to several power quality issues, particularly harmonics. The distortions caused by these power quality issues must adhere to the limits established by international standards. Mitigation of these concerns is critical, and active power filters are a realistic option. However, passive filters have problems such as bulkiness, and resonance with either/both load and utility impedance, and the source impedance affects filtering properties. As a result, active power filters (APF) are designed to address the shortcomings of passive filters. Active power filters (APF) offer several advantages over passive filters, including compact size, enhanced filtering characteristics, dynamic performance, and flexible operation. The control strategy of APF strongly influences the APF performance, efficiency, and reliability. This paper presents a detailed assessment of current active filter control systems, highlighting their key features. The characteristics, performance, applicability, and implementation of various control techniques are explored and investigated. Keywords: Active power filters Control strategies Current control Harmonics Power quality This is an open access article under the CC BY-SA license. Corresponding Author: Vineeta S. Chauhan Department of Electrical Engineering, Indus University Ahmedabad, India Email: vineetachauhan.el@indusuni.ac.in 1. INTRODUCTION Enhancing power quality has evolved into an imperative undertaking for researchers and engineers involved in utility networks. Advances in power electronics technology have streamlined the process of aligning power quality with IEEE standards [1], [2]. Insufficient power quality can give rise to numerous issues, such as undesirable device operation, increased power losses, a diminished power factor, compromised performance efficiency, and interference with communication networks [3]-[6]. Custom power devices (CPD) are widely employed to overcome these undesired disturbances. CPD performance at variable voltage stages appears to be becoming more common in the electricity (utility) and industrial sectors [7]-[10]. Initially, passive filters (PF) in the electricity industry were primarily employed for harmonic reduction and rectification. However, issues like fixed compensation, unwieldy size, and