Краткий осмотр (реферат): An inductive short circuit current limiter with a superconducting shield and its operation under normal and emergency conditions are analyzed. A method for calculating its key parameters is proposed. Ссылка на статью (доступны первая и вторая страницы статьи для просмотра)
У статті розглянуто обмежувач струму короткого замикання індуктивного типу з високотемпературними надпровідними обмоткою та екраном. Проаналізовано основні особливості перехідного процесу при виникненні струму короткого замикання. В статье рассмотрен ограничитель тока короткого замыкания индуктивного типа с высокотемпературными сверхпроводящими обмоткой и экраном. Проанализированы основные особенности переходного процесса при возникновении тока короткого замыкания.
Purpose. The inductances of magnetic system of a current limiter for the nominal operating mode were determined. The aspects of functioning and a design of a superconducting short-circuit current limiter of inductive type with a superconductive main and additional screens, and superconductive winding, which are placed in a general cryostat on a ferromagnetic core, which ensures an improvement of magnetic field dissipation and in energy efficiency are observed. Methodology. The analysis of distribution of magnetic field of the short-circuit current limiter of inductive type with superconducting high-temperature coil and superconducting main and additional screens, using mathematical modeling by the finite element method in math software package FEMM for different modes of operation is carried out. Results. The calculations of magnetic field dissipation in operational modes are carried out. Originality. The investigations aimed to analyze the influence of distribution of the magnetic field in inductive short-circuit current limiter with superconducting additional screen on its operation modes. First calculation of the distribution of magnetic fields in different modes of operation for the short-circuit current limiter in the area between hightemperature superconducting screens. Practical value. The advantage of additional screen of superconducting short-circuit current limiter is to improve screening from dissipation of the magnetic fields of the magnetic system and reducing the power losses at nominal mode. Using the proposed methodology will identify options acceptable to the current limiter mode of operation. References 15, tables 3, figures 6. Key words: current limiter, high-temperature superconductor, superconducting screen, inductance, magnetic field, ferromagnetic core.Проведен анализ режимов работы и конструктивной схемы сверхпроводящего ограничителя тока короткого замыкания индуктивного типа с дополнительным сверхпроводящим экраном. Проведено математическое моделирование магнитной системы ограничителя тока методом конечных элементов в программной среде FEMM. Проведен расчет распределения магнитных полей в различных режимах срабатывания ограничителя тока короткого замыкания на участке между основным и дополнительным экранами, что позволяет определить параметры ограничителя тока. Библ. 15, табл. 3, рис. 6. Ключевые слова: ограничитель тока, высокотемпературный сверхпроводник, сверхпроводящий экран, индуктивность, магнитное поле, магнитопровод.
An effective method for the purposeful synthesis of elastomer composites with improved processing and mechanical properties is the use of chemical modifi ers. Mono-and bifunctional C-nitroso aromatic (CNA) compounds, mainly p-nitrosodiphenylamine (PNDPA) and 1,4-bis(4-nitrosophenyl)piperazine (promoter 127), are most widely used for these purposes [1-3].
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