High Voltage Insulating Materials-Current State and Prospects

Dear Colleagues,

The proper operation of high-voltage devices, especially transformers, is mainly determined by their insulation conditions. Solid, liquid, and gaseous dielectrics used as electrical insulation in high-voltage equipment must ensure correct, continuous, uninterrupted, and safe operation of the devices. In addition, ensuring an appropriate level of environmental safety is extremely important. Insulation materials work under conditions of high temperature, high electric fields, or mechanical stresses. Such conditions require high-quality materials, which should not change over time. Therefore, it is very important to study the properties of materials used in high-voltage equipment from various perspectives, such as electrical (AC, DC, LI, or combined exposure), thermal (e.g., accelerated aging), or chemical (impact of environmental factors or material compatibility). In all these areas, researchers are seeking to find optimal solutions for insualting materials that will work well in industrial applications. The development of the HVDC technology, which involves specific stress conditions and thus specific physical phenomena associated with stress, has become extremely important in this respect.

Since insulating materials are constantly developing and new materials keep appearing in the market (e.g., biodegradable insulating liquids in the case of liquid dielectrics or nano-fluids), this Special Issue will be focused on all aspects of new solutions proposed for use in high-voltage applications.

Therefore, papers that deal with the study of the dielectric and thermal properties of insulation materials for electrical applications and those focused on other properties of dielectrics are warmly welcomed. Studies on the chemical structure of materials and on the impact of this structure (admixtures, nanoparticles) on the properties of single dielectrics and mixtures are also of interest. Papers may as well report research methods to study insulating materials in the laboratory testing phase as well as in operating conditions.

Prof. Dr. Pawel Rozga
Prof. Dr. Abderrahmane Beroual
Guest Editors

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