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The requirements for limiting electromagnetic disturbances result in the need to use appropriately selected elements that suppress the disturbances in question. Therefore, detailed studies of the attenuation efficiency at the design stage should be carried out. The above approach is to ensure adaptation to the current requirements in the field of electromagnetic compatibility. Ferrite cores are the least expensive way to reduce the cost of electromagnetic interference suppression. The structure of ferrite cores is usually mixed, and the nomenclature used by manufacturers is varied. Also, the lack of detailed data on the parameters of the ferrite core may lead to incorrect design assumptions, which results with increased in design costs. Therefore, this article presents in detail the method of assessing the attenuation characteristics of ferrite depending on its parameters, based on the example of specific ferrites. Also, this article shows a methodology for defining the attenuation performance characteristics of selected ferrite cores based on experimental studies. The above-mentioned studies can be helpful by refinement of the CISPR 17 standard. The results presented in this article will indicate the possible range of impedance for the application of the analyzed methods for the evaluation of ferrite damping properties based on CISPR 17. [ABSTRACT FROM AUTHOR]

This paper presents the possibilities of reducing emergency situations and reducing the time of failure in the power grid. The paper contains a detailed description of the method (algorithm) of operation in emergency situations on the example of a Gas-Insulated Switchgear (GIS) located in one of the system-forming (node) stations in the power grid. The level of detail contained in this paper, which has not been previously encountered in previous publications, favors an in-depth understanding of the possible solutions that result from these emergencies. The above method (algorithm) of activities has been developed based on three levels of research: simulation, theoretical and practical. This means that the simulation analysis that was performed based on theoretical information was experimentally tested as part of an emergency situation in one of the system-forming (nodal) stations in the power system. In order to achieve the result described in this article, one of the most promising types of devices used in power systems was selected - the GIS. This has been confirmed by numerous analyzes of the effectiveness of these devices included in this article. The paper contains a detailed description of the individual steps in the field of corrective actions and aimed at minimizing downtime. In addition, this article provides guidance to monitor possible emergencies that are designed to increase the reliability of the power grid. [ABSTRACT FROM AUTHOR]