Editorial Special Section on Harmonics Stability and Mitigation in Power Electronics

The global electrical energy consumption is still increasing, which demands that the power capacity and power transmission capabilities must be more than double within 20 years. This is not only resulting from the rising electricity demand but also caused by an ever-increasing amount of electrification in the society. Electric power production has been changing from conventional fossil energy sources to renewable energy sources—in 2014, 60% of all installed production capacity came from renewables. The global shift to renewable-energy-based power generation brings in an unprecedented opportunity for the development of highly efficient and sustainable power electronics technology. As an enabling technology for a full control of electric power, power electronics are increasingly used for power generation, transmission/distribution, and various end-user applications. Such a large-scale expansion of power electronics usage is changing the characteristic of the power system by introducing more highly nonlinear and time-delayed dynamic systems, therefore increasing the risk of instability and power quality problems in the future power systems.