International Journal of Power Electronics and Drive Systems (IJPEDS) Vol. 13, No. 4, December 2022, pp. 2148~2158 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v13.i4.pp2148-2158  2148 Journal homepage: http://ijpeds.iaescore.com Distributed power flow controller based on fuzzy-logic controller for solar-wind energy hybrid system Vemuri Sowmya Sree, Coppisetty Srinivasa Rao Department of Electrical and Electronics Engineering, Jawaharlal Nehru Technological University, Anantapuramu, India Department of Electrical and Electronics Engineering, G. Pullaiah College of Engineering and Technology, Andhra Pradesh, India Article Info ABSTRACT Article history: Received Jan 3, 2022 Revised Sep 13, 2022 Accepted Sep 30, 2022 The demand of electricity globally led to the concept of renewable energy resources for power generation that are eco-friendly and freely available from nature. The solar photovoltaic systems and wind-based power generators are considered as primary renewable resources and are called as Distributed Generation units as they are scattered in nature. These are operated with bidirectional converters by providing auxiliary services at grid side and load side in either mode of microgrid operation. Besides, the DC power generation units’ integration gets converted into AC system by means of inverters. These types of systems not only increase voltage and current harmonics, power frequency deviations but also drive the distribution system to risky operating zone. This emphasizes the stipulation of advanced control schemes for microgrid architecture. Consequently, power electronic converters introduce harmonics in the system and affect the system performance. To report these expanded issues, the authors recognized an advanced custom power device entitled distributed power flow controller. The proposed hybrid solar-wind energy system is first studied with a distributed power-flow controller. Later the system is examined by replacing proportional integral controller with fuzzy logic controller (FLC) for shunt control of distributed power-flow controller. To validate the investigations, MATLAB/Simulink software is used. Keywords: Distributed power flow controller Fuzzy logic controller MATLAB/Simulink Power quality Solar-wind system This is an open access article under the CC BY-SA license. Corresponding Author: Vemuri Sowmya Sree Department of Electrical and Electronics Engineering, Jawaharlal Nehru Technological University Anantapuramu 515002, India Email: sowmya.sree14@gmail.com 1. INTRODUCTION The swift escalation of power electronic equipment and its appliance have vividly altered the distinctiveness in the distribution system. The redundant serious power-quality problems are created in recent distribution system due to power electronic device based nonlinear components. Fascinatingly, it is renowned that the same power electronic devices have the capability to shield utility grid and load either from power quality problems. The flexible AC transmission system (FACTS) device and custom power device (CPD) are considered as the vital compensation devices to be installed in power system for finest control of active and reactive power flow [1]. The development of the FACTS has allowed for the implementation of various novel ideas that are making the power system more dependable, flexible, and providing greater control over power flow without affecting the generating schedule. In an effort to optimize the performance of the power system network, the authors of this research suggest an unique device termed as distributed-power flow controller (DPFC), which is an improved version of the unified power flow controller (UPFC). The primary distinction between DPFC and UPFC is the lack of