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Information × Registration Number 0223U001964, 0121U111836 , R & D reports Title Investigation of nonlinear magnetic connections between elements of power cables of high-voltage power lines covered by ferromagnetic cores popup.stage_title Head Hrinchenko Volodymyr S., Кандидат технічних наук Registration Date 06-02-2023 Organization A. Podgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine popup.description2  The goal of the project is to develop a mathematical model of electromagnetic processes in high-voltage cables covered by ferromagnetic cores, taking into account nonlinear magnetic coupling between cores and shields, and to increase the accuracy of calculating the shielded magnetic field of the cable line. Based on the laws of theoretical electrical engineering and classical electrodynamics, a mathematical model of electromagnetic processes that occur in cables of a high-voltage cable line covered by ferromagnetic cores, which are part of the shielding system of its magnetic field, when the cables shields are grounded at both ends, is developed. The nonlinear magnetic coupling between the cores and the cables shields is described using the effective magnetic permeability of ferromagnetic cores, and an iterative algorithm for its calculation is proposed. To determine the main magnetization curve of the cores, which is included in the input data of this algorithm, a measuring bench was assembled, relevant experimental studies are performed, and a new approach to the approximation of the measurement results by an analytical function is developed. The resulting fine-rational function adequately describes the magnetization curve of the cores and can be used in engineering calculations of the effective magnetic permeability using an iterative algorithm. According to the results of the project, the draft of amendments to item E.6 of the regulatory document SOU-N MEV 40.1-37471933-49:2011 "Design of cable lines with voltage up to 330 kV" is developed. Product Description popup.authors popup.nrat_date 2023-02-06 Close