A Comprehensive Review on Supraharmonics—The Next Big Power Quality Concern

In recent years, electric power distribution systems have been focusing on power electronic converters. This is due to the integration of smart grids, electric vehicles, and renewable energy sources. As a result of incorporating renewable energy sources, nonlinear loads, and power electronics-based devices, modern electrical power grids are vulnerable to several power quality issues. The use of power electronics converters results in novel supraharmonic emissions, that do not fall within the traditional power quality frequency range. A detailed analysis of supraharmonic emissions is essential as they have a significant impact on the modern electrical grid. This paper starts by discussing the current scenario of electrical power systems and then introduces supraharmonics. The intentional and non-intentional sources of supraharmonics, such as power line communication (PLC), electric vehicle (EV) charging devices, lighting devices, solar and wind energy converters, along with their corresponding emission frequency bands, are also discussed. This paper presents a summary of the measurement methods and standards related to supraharmonic emissions. Finally, various research approaches addressing the reduction of supraharmonic emissions are proposed.