e-Prime: Advances in Electrical Engineering, Electronics and Energy (Jun 2024)
A critical analysis of different power quality improvement techniques in microgrid
Abstract
Summary: Recently, the exponential decay of traditional petroleum and coal-based reserves with the ever-rising energy demand has led to the need for alternate energy sources. Distributed Generation (DG) based on renewable energy sources serves as a viable alternative solution for researchers to counter the issue of rising load. Hence the use of renewable energy sources is of utmost priority. Renewable non-traditional energy resources also have the advantage of being an unlimited energy source and climate-friendly in nature. In this context, distributed micro-generating units come into the picture, popularly known as MicroGrid (MG). The MGs are small-scale resources generating electrical energy and connected to the main utility through power electronic converters. The main drawbacks associated with MGs are their association with converters and switching devices, which leads to the injection of disturbances in the power system. Due to the tremendous use of MGs in modern power systems, the inherent intermittent nature of the renewable sources increased infiltration of nonlinear loads, and the distributed nature of micro-generating units, huge power quality (PQ) issues are observed hazardous to both generation and supply ends. PQ issues could be either the reactive power compensation or the generation of harmonics that hamper the normal functioning of the electrical energy system. To maintain healthy transmission and distribution of electrical power, these issues must be taken care of utmost priority. Because of customer satisfaction, utilities have adopted many profitable schemes and power quality improvement methods. In this regard, around 350 recent review articles have been comprehensively surveyed, and a detailed discussion about regulation of power quality issues using the filters, controllers, Flexible AC Transmission Systems (FACTS), optimization techniques (OTs), and machine learning tools with modern and advanced control techniques have been highlighted in this review article. A clear idea regarding power quality and its enhancement in MG has been presented. The technical and economic aspects have also been projected in brief. In addition, an in-depth study covering all challenges has been cited, and possible solutions in the future for hassle-free PQ improvement have been suggested in detail. It is believed that this review article would serve as an efficient background for researchers, academicians, electrical engineers, industrialists, and manufacturers working towards the hassle-free operation of MGs by efficient PQ issues mitigation.
