**Preface to "Industrial and Technological Applications of Power Electronics Systems"**

Since the turn of the century, interest in electrical power systems has been growing steadily, in part due to a tendency to move from directly controlled to intelligent autonomous energy systems. In particular, the increasing presence of renewable energy sources and the development of novel technologies, which demand active and often ultra-precise power supply systems, have generated extensive research in the area of advanced power electronics systems. The importance and scope of the application of regulated power sources in various technological systems are also growing, e.g., using plasma, ultrasounds, and superconductors. Furthermore, researchers pay great attention to loads in these systems, which are mostly represented by various types of electric drives that should be energy efficient. Hence, the main role in many modern technologies and industrial systems is to diversify power electronics converters by applying new topologies, components, and smart controls, where emphasis is placed on such merits as wide input voltage, load regulation range, improved quality of the input and output parameters, high control flexibility, and low cost. To promote research, and accelerate the transfer of knowledge and experience in the above areas, we propose a Special Issue of Energies on industrial and technological applications of power electronics systems. An important premise of this Special Issue would be the synergy effect derived from a combination of views and approaches from various power electronics application areas.

> **Ryszard Strzelecki, Galina Demidova , Dmitri Vinnikov** *Editors*

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